./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-87.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_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/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_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-87.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/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_170e3c92-0e7c-4bfc-935b-71c304f7778a/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 4d3cce94ffabfa8eb2319567467a3939f8beda53c0e9f767c0ac9dd6ba326551 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 07:12:28,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 07:12:28,759 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 07:12:28,764 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 07:12:28,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 07:12:28,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 07:12:28,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 07:12:28,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 07:12:28,793 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 07:12:28,794 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 07:12:28,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 07:12:28,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 07:12:28,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 07:12:28,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 07:12:28,797 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 07:12:28,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 07:12:28,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 07:12:28,798 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 07:12:28,799 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 07:12:28,799 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 07:12:28,800 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 07:12:28,800 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 07:12:28,801 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 07:12:28,801 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 07:12:28,801 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 07:12:28,802 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 07:12:28,802 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 07:12:28,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 07:12:28,803 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 07:12:28,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 07:12:28,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 07:12:28,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:12:28,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 07:12:28,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 07:12:28,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 07:12:28,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 07:12:28,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 07:12:28,805 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 07:12:28,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 07:12:28,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 07:12:28,806 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 07:12:28,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 07:12:28,806 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_170e3c92-0e7c-4bfc-935b-71c304f7778a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d3cce94ffabfa8eb2319567467a3939f8beda53c0e9f767c0ac9dd6ba326551 [2023-11-29 07:12:29,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 07:12:29,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 07:12:29,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 07:12:29,058 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 07:12:29,058 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 07:12:29,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-87.i [2023-11-29 07:12:31,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 07:12:32,108 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 07:12:32,109 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-87.i [2023-11-29 07:12:32,125 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/data/040748f00/38b2c197b9bd469e8112b525630aaaad/FLAG498983c9e [2023-11-29 07:12:32,140 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/data/040748f00/38b2c197b9bd469e8112b525630aaaad [2023-11-29 07:12:32,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 07:12:32,144 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 07:12:32,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 07:12:32,146 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 07:12:32,151 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 07:12:32,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:32,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fcc622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32, skipping insertion in model container [2023-11-29 07:12:32,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:32,223 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 07:12:32,370 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_170e3c92-0e7c-4bfc-935b-71c304f7778a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-87.i[916,929] [2023-11-29 07:12:32,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:12:32,623 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 07:12:32,636 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_170e3c92-0e7c-4bfc-935b-71c304f7778a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-87.i[916,929] [2023-11-29 07:12:32,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:12:32,779 INFO L206 MainTranslator]: Completed translation [2023-11-29 07:12:32,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32 WrapperNode [2023-11-29 07:12:32,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 07:12:32,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 07:12:32,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 07:12:32,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 07:12:32,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:32,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:32,979 INFO L138 Inliner]: procedures = 26, calls = 81, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 707 [2023-11-29 07:12:32,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 07:12:32,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 07:12:32,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 07:12:32,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 07:12:32,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,029 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,069 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 07:12:33,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,124 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 07:12:33,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 07:12:33,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 07:12:33,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 07:12:33,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (1/1) ... [2023-11-29 07:12:33,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:12:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:33,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 07:12:33,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 07:12:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 07:12:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 07:12:33,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 07:12:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 07:12:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 07:12:33,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 07:12:33,396 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 07:12:33,398 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 07:12:34,437 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 07:12:34,499 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 07:12:34,499 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 07:12:34,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:12:34 BoogieIcfgContainer [2023-11-29 07:12:34,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 07:12:34,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 07:12:34,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 07:12:34,506 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 07:12:34,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:12:32" (1/3) ... [2023-11-29 07:12:34,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e04f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:12:34, skipping insertion in model container [2023-11-29 07:12:34,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:12:32" (2/3) ... [2023-11-29 07:12:34,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e04f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:12:34, skipping insertion in model container [2023-11-29 07:12:34,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:12:34" (3/3) ... [2023-11-29 07:12:34,509 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-87.i [2023-11-29 07:12:34,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 07:12:34,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 07:12:34,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 07:12:34,592 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;@7d8c9a38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 07:12:34,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 07:12:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 196 states have (on average 1.586734693877551) internal successors, (311), 197 states have internal predecessors, (311), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 07:12:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 07:12:34,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:34,631 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:34,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:34,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1388841345, now seen corresponding path program 1 times [2023-11-29 07:12:34,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:34,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847799335] [2023-11-29 07:12:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:34,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:35,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:35,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847799335] [2023-11-29 07:12:35,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 07:12:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108592090] [2023-11-29 07:12:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:35,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:35,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:35,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:35,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 07:12:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:35,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 07:12:35,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2023-11-29 07:12:35,528 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:35,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108592090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:35,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:35,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:12:35,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415590059] [2023-11-29 07:12:35,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:35,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 07:12:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 07:12:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 07:12:35,568 INFO L87 Difference]: Start difference. First operand has 267 states, 196 states have (on average 1.586734693877551) internal successors, (311), 197 states have internal predecessors, (311), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 2 states, 2 states have (on average 62.5) internal successors, (125), 2 states have internal predecessors, (125), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 07:12:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:35,636 INFO L93 Difference]: Finished difference Result 531 states and 960 transitions. [2023-11-29 07:12:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 07:12:35,639 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 62.5) internal successors, (125), 2 states have internal predecessors, (125), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) Word has length 460 [2023-11-29 07:12:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:35,648 INFO L225 Difference]: With dead ends: 531 [2023-11-29 07:12:35,648 INFO L226 Difference]: Without dead ends: 265 [2023-11-29 07:12:35,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 459 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 07:12:35,656 INFO L413 NwaCegarLoop]: 434 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, 434 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 07:12:35,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 434 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 07:12:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-29 07:12:35,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2023-11-29 07:12:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 195 states have (on average 1.5435897435897437) internal successors, (301), 195 states have internal predecessors, (301), 68 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 07:12:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 437 transitions. [2023-11-29 07:12:35,731 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 437 transitions. Word has length 460 [2023-11-29 07:12:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:35,732 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 437 transitions. [2023-11-29 07:12:35,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 62.5) internal successors, (125), 2 states have internal predecessors, (125), 2 states have call successors, (68), 2 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 2 states have call successors, (68) [2023-11-29 07:12:35,733 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 437 transitions. [2023-11-29 07:12:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 07:12:35,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:35,746 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:35,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 07:12:35,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 07:12:35,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:35,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 66301689, now seen corresponding path program 1 times [2023-11-29 07:12:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:35,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102648005] [2023-11-29 07:12:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:35,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:36,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:36,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952774420] [2023-11-29 07:12:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:36,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:36,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 07:12:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:36,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 07:12:36,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:37,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:37,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:37,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102648005] [2023-11-29 07:12:37,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:37,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952774420] [2023-11-29 07:12:37,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952774420] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:37,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:37,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:12:37,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152326887] [2023-11-29 07:12:37,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:37,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:12:37,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:37,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:12:37,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:12:37,108 INFO L87 Difference]: Start difference. First operand 265 states and 437 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:37,645 INFO L93 Difference]: Finished difference Result 862 states and 1422 transitions. [2023-11-29 07:12:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:12:37,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 460 [2023-11-29 07:12:37,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:37,655 INFO L225 Difference]: With dead ends: 862 [2023-11-29 07:12:37,656 INFO L226 Difference]: Without dead ends: 598 [2023-11-29 07:12:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:12:37,660 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 919 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:37,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1672 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:12:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2023-11-29 07:12:37,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 526. [2023-11-29 07:12:37,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 387 states have (on average 1.545219638242894) internal successors, (598), 387 states have internal predecessors, (598), 136 states have call successors, (136), 2 states have call predecessors, (136), 2 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-29 07:12:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 870 transitions. [2023-11-29 07:12:37,752 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 870 transitions. Word has length 460 [2023-11-29 07:12:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:37,754 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 870 transitions. [2023-11-29 07:12:37,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 870 transitions. [2023-11-29 07:12:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-29 07:12:37,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:37,761 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:37,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 07:12:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 07:12:37,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:37,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:37,963 INFO L85 PathProgramCache]: Analyzing trace with hash 93367291, now seen corresponding path program 1 times [2023-11-29 07:12:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:37,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153798057] [2023-11-29 07:12:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:38,051 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:38,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357780183] [2023-11-29 07:12:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:38,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:38,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:38,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:38,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 07:12:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:38,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 07:12:38,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:39,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:39,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:39,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153798057] [2023-11-29 07:12:39,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:39,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357780183] [2023-11-29 07:12:39,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357780183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:39,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:39,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:12:39,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474606951] [2023-11-29 07:12:39,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:39,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:12:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:12:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:12:39,049 INFO L87 Difference]: Start difference. First operand 526 states and 870 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:39,550 INFO L93 Difference]: Finished difference Result 1700 states and 2811 transitions. [2023-11-29 07:12:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:12:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 460 [2023-11-29 07:12:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:39,562 INFO L225 Difference]: With dead ends: 1700 [2023-11-29 07:12:39,562 INFO L226 Difference]: Without dead ends: 1175 [2023-11-29 07:12:39,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:12:39,565 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 867 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:39,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 1401 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:12:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2023-11-29 07:12:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1049. [2023-11-29 07:12:39,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 772 states have (on average 1.544041450777202) internal successors, (1192), 772 states have internal predecessors, (1192), 272 states have call successors, (272), 4 states have call predecessors, (272), 4 states have return successors, (272), 272 states have call predecessors, (272), 272 states have call successors, (272) [2023-11-29 07:12:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1736 transitions. [2023-11-29 07:12:39,677 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1736 transitions. Word has length 460 [2023-11-29 07:12:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:39,679 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1736 transitions. [2023-11-29 07:12:39,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 4 states have internal predecessors, (123), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1736 transitions. [2023-11-29 07:12:39,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 07:12:39,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:39,684 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:39,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 07:12:39,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:39,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:39,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1740720760, now seen corresponding path program 1 times [2023-11-29 07:12:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:39,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801032778] [2023-11-29 07:12:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:39,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:40,012 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:40,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806307334] [2023-11-29 07:12:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:40,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:40,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:40,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:40,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 07:12:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:40,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 07:12:40,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:40,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:40,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:40,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801032778] [2023-11-29 07:12:40,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:40,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806307334] [2023-11-29 07:12:40,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806307334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:40,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:40,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:12:40,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188031746] [2023-11-29 07:12:40,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:40,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:12:40,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:12:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:12:40,470 INFO L87 Difference]: Start difference. First operand 1049 states and 1736 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:40,642 INFO L93 Difference]: Finished difference Result 3145 states and 5206 transitions. [2023-11-29 07:12:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:12:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 461 [2023-11-29 07:12:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:40,656 INFO L225 Difference]: With dead ends: 3145 [2023-11-29 07:12:40,656 INFO L226 Difference]: Without dead ends: 2097 [2023-11-29 07:12:40,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:12:40,661 INFO L413 NwaCegarLoop]: 695 mSDtfsCounter, 409 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:40,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1791 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:12:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2023-11-29 07:12:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1519. [2023-11-29 07:12:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1242 states have (on average 1.607085346215781) internal successors, (1996), 1242 states have internal predecessors, (1996), 272 states have call successors, (272), 4 states have call predecessors, (272), 4 states have return successors, (272), 272 states have call predecessors, (272), 272 states have call successors, (272) [2023-11-29 07:12:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2540 transitions. [2023-11-29 07:12:40,838 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2540 transitions. Word has length 461 [2023-11-29 07:12:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:40,840 INFO L495 AbstractCegarLoop]: Abstraction has 1519 states and 2540 transitions. [2023-11-29 07:12:40,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2540 transitions. [2023-11-29 07:12:40,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 07:12:40,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:40,846 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:40,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 07:12:41,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:41,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:41,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:41,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1817621558, now seen corresponding path program 1 times [2023-11-29 07:12:41,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:41,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584908192] [2023-11-29 07:12:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:41,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:41,127 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:41,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720224318] [2023-11-29 07:12:41,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:41,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:41,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:41,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:41,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 07:12:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:41,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:12:41,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:41,523 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:41,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:41,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584908192] [2023-11-29 07:12:41,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:41,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720224318] [2023-11-29 07:12:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720224318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:41,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:41,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:12:41,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231652652] [2023-11-29 07:12:41,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:41,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:12:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:12:41,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:12:41,528 INFO L87 Difference]: Start difference. First operand 1519 states and 2540 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:41,775 INFO L93 Difference]: Finished difference Result 4515 states and 7538 transitions. [2023-11-29 07:12:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:12:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 461 [2023-11-29 07:12:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:41,797 INFO L225 Difference]: With dead ends: 4515 [2023-11-29 07:12:41,798 INFO L226 Difference]: Without dead ends: 2997 [2023-11-29 07:12:41,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 459 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 07:12:41,803 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 408 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:41,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 1230 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:12:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2023-11-29 07:12:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2959. [2023-11-29 07:12:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2406 states have (on average 1.5852036575228594) internal successors, (3814), 2406 states have internal predecessors, (3814), 544 states have call successors, (544), 8 states have call predecessors, (544), 8 states have return successors, (544), 544 states have call predecessors, (544), 544 states have call successors, (544) [2023-11-29 07:12:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 4902 transitions. [2023-11-29 07:12:42,083 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 4902 transitions. Word has length 461 [2023-11-29 07:12:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:42,084 INFO L495 AbstractCegarLoop]: Abstraction has 2959 states and 4902 transitions. [2023-11-29 07:12:42,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 4902 transitions. [2023-11-29 07:12:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 07:12:42,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:42,092 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:42,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 07:12:42,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:42,295 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:42,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:42,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1261192012, now seen corresponding path program 1 times [2023-11-29 07:12:42,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817026368] [2023-11-29 07:12:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:42,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:42,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:42,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17449638] [2023-11-29 07:12:42,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:42,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:42,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:42,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 07:12:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:42,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:12:42,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:42,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:42,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:42,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817026368] [2023-11-29 07:12:42,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:42,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17449638] [2023-11-29 07:12:42,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17449638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:42,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:42,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:12:42,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315666713] [2023-11-29 07:12:42,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:42,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:12:42,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:42,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:12:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:12:42,923 INFO L87 Difference]: Start difference. First operand 2959 states and 4902 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:43,282 INFO L93 Difference]: Finished difference Result 8747 states and 14496 transitions. [2023-11-29 07:12:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:12:43,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 461 [2023-11-29 07:12:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:43,323 INFO L225 Difference]: With dead ends: 8747 [2023-11-29 07:12:43,323 INFO L226 Difference]: Without dead ends: 5789 [2023-11-29 07:12:43,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 459 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 07:12:43,334 INFO L413 NwaCegarLoop]: 675 mSDtfsCounter, 387 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:43,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1096 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:12:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5789 states. [2023-11-29 07:12:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5789 to 4003. [2023-11-29 07:12:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 3450 states have (on average 1.6179710144927537) internal successors, (5582), 3450 states have internal predecessors, (5582), 544 states have call successors, (544), 8 states have call predecessors, (544), 8 states have return successors, (544), 544 states have call predecessors, (544), 544 states have call successors, (544) [2023-11-29 07:12:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 6670 transitions. [2023-11-29 07:12:43,969 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 6670 transitions. Word has length 461 [2023-11-29 07:12:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:43,970 INFO L495 AbstractCegarLoop]: Abstraction has 4003 states and 6670 transitions. [2023-11-29 07:12:43,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 6670 transitions. [2023-11-29 07:12:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 07:12:43,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:43,978 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:43,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 07:12:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:44,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:44,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1719212980, now seen corresponding path program 1 times [2023-11-29 07:12:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:44,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759460759] [2023-11-29 07:12:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:44,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:44,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:44,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199199747] [2023-11-29 07:12:44,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:44,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:44,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:44,252 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:44,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 07:12:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:44,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:12:44,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:45,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:45,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759460759] [2023-11-29 07:12:45,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:45,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199199747] [2023-11-29 07:12:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199199747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:45,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:45,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:12:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886674791] [2023-11-29 07:12:45,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:45,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:12:45,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:12:45,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:12:45,822 INFO L87 Difference]: Start difference. First operand 4003 states and 6670 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:46,379 INFO L93 Difference]: Finished difference Result 10691 states and 17889 transitions. [2023-11-29 07:12:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:12:46,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 461 [2023-11-29 07:12:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:46,415 INFO L225 Difference]: With dead ends: 10691 [2023-11-29 07:12:46,415 INFO L226 Difference]: Without dead ends: 6689 [2023-11-29 07:12:46,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:12:46,425 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 496 mSDsluCounter, 1257 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:46,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 1682 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:12:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6689 states. [2023-11-29 07:12:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6689 to 4335. [2023-11-29 07:12:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4335 states, 3713 states have (on average 1.6094802046862375) internal successors, (5976), 3713 states have internal predecessors, (5976), 612 states have call successors, (612), 9 states have call predecessors, (612), 9 states have return successors, (612), 612 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 07:12:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4335 states to 4335 states and 7200 transitions. [2023-11-29 07:12:46,778 INFO L78 Accepts]: Start accepts. Automaton has 4335 states and 7200 transitions. Word has length 461 [2023-11-29 07:12:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:46,779 INFO L495 AbstractCegarLoop]: Abstraction has 4335 states and 7200 transitions. [2023-11-29 07:12:46,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4335 states and 7200 transitions. [2023-11-29 07:12:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-29 07:12:46,785 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:46,785 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:46,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 07:12:46,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 07:12:46,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:46,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash 889574478, now seen corresponding path program 1 times [2023-11-29 07:12:46,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:46,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337026497] [2023-11-29 07:12:46,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:47,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:47,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726065157] [2023-11-29 07:12:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:47,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:47,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:47,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 07:12:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:47,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:12:47,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:48,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:48,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337026497] [2023-11-29 07:12:48,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726065157] [2023-11-29 07:12:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726065157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:48,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:48,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:12:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151883938] [2023-11-29 07:12:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:48,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:12:48,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:12:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:12:48,436 INFO L87 Difference]: Start difference. First operand 4335 states and 7200 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:48,837 INFO L93 Difference]: Finished difference Result 9212 states and 15342 transitions. [2023-11-29 07:12:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:12:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 461 [2023-11-29 07:12:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:48,866 INFO L225 Difference]: With dead ends: 9212 [2023-11-29 07:12:48,866 INFO L226 Difference]: Without dead ends: 5000 [2023-11-29 07:12:48,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:12:48,875 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 331 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:48,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1250 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:12:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2023-11-29 07:12:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4334. [2023-11-29 07:12:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4334 states, 3712 states have (on average 1.6088362068965518) internal successors, (5972), 3712 states have internal predecessors, (5972), 612 states have call successors, (612), 9 states have call predecessors, (612), 9 states have return successors, (612), 612 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 07:12:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 7196 transitions. [2023-11-29 07:12:49,149 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 7196 transitions. Word has length 461 [2023-11-29 07:12:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:49,150 INFO L495 AbstractCegarLoop]: Abstraction has 4334 states and 7196 transitions. [2023-11-29 07:12:49,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:49,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 7196 transitions. [2023-11-29 07:12:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-29 07:12:49,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:49,159 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:49,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 07:12:49,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 07:12:49,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:49,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:49,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1366911347, now seen corresponding path program 1 times [2023-11-29 07:12:49,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:49,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679034893] [2023-11-29 07:12:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:49,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:49,430 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:49,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910058981] [2023-11-29 07:12:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:49,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:49,431 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 07:12:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:49,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:12:49,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 3363 proven. 153 refuted. 0 times theorem prover too weak. 5596 trivial. 0 not checked. [2023-11-29 07:12:50,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:12:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 48 proven. 153 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 07:12:50,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:50,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679034893] [2023-11-29 07:12:50,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:50,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910058981] [2023-11-29 07:12:50,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910058981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:12:50,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:12:50,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 07:12:50,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796190391] [2023-11-29 07:12:50,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:12:50,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:12:50,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:12:50,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:12:50,684 INFO L87 Difference]: Start difference. First operand 4334 states and 7196 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-29 07:12:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:51,480 INFO L93 Difference]: Finished difference Result 8534 states and 14136 transitions. [2023-11-29 07:12:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:12:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) Word has length 463 [2023-11-29 07:12:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:51,497 INFO L225 Difference]: With dead ends: 8534 [2023-11-29 07:12:51,497 INFO L226 Difference]: Without dead ends: 4390 [2023-11-29 07:12:51,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 918 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:12:51,507 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 480 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:51,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 960 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:12:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2023-11-29 07:12:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 4370. [2023-11-29 07:12:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 3739 states have (on average 1.599625568333779) internal successors, (5981), 3739 states have internal predecessors, (5981), 612 states have call successors, (612), 18 states have call predecessors, (612), 18 states have return successors, (612), 612 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 07:12:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 7205 transitions. [2023-11-29 07:12:51,896 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 7205 transitions. Word has length 463 [2023-11-29 07:12:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:51,897 INFO L495 AbstractCegarLoop]: Abstraction has 4370 states and 7205 transitions. [2023-11-29 07:12:51,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-29 07:12:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 7205 transitions. [2023-11-29 07:12:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-29 07:12:51,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:51,906 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:51,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 07:12:52,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 07:12:52,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:52,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:52,107 INFO L85 PathProgramCache]: Analyzing trace with hash 798986311, now seen corresponding path program 1 times [2023-11-29 07:12:52,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:52,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936600390] [2023-11-29 07:12:52,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:52,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:52,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:52,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981874360] [2023-11-29 07:12:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:52,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:52,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:52,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 07:12:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:52,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 07:12:52,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:53,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:12:53,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:12:53,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:53,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936600390] [2023-11-29 07:12:53,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:53,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981874360] [2023-11-29 07:12:53,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981874360] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:12:53,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:12:53,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:12:53,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409945567] [2023-11-29 07:12:53,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:12:53,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:12:53,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:12:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:12:53,037 INFO L87 Difference]: Start difference. First operand 4370 states and 7205 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:54,039 INFO L93 Difference]: Finished difference Result 16928 states and 28031 transitions. [2023-11-29 07:12:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:12:54,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 464 [2023-11-29 07:12:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:54,067 INFO L225 Difference]: With dead ends: 16928 [2023-11-29 07:12:54,067 INFO L226 Difference]: Without dead ends: 12720 [2023-11-29 07:12:54,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:12:54,076 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 1623 mSDsluCounter, 1831 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1623 SdHoareTripleChecker+Valid, 2283 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:54,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1623 Valid, 2283 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 07:12:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12720 states. [2023-11-29 07:12:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12720 to 11192. [2023-11-29 07:12:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11192 states, 10148 states have (on average 1.6098738667717778) internal successors, (16337), 10158 states have internal predecessors, (16337), 1004 states have call successors, (1004), 39 states have call predecessors, (1004), 39 states have return successors, (1004), 994 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-29 07:12:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11192 states to 11192 states and 18345 transitions. [2023-11-29 07:12:54,660 INFO L78 Accepts]: Start accepts. Automaton has 11192 states and 18345 transitions. Word has length 464 [2023-11-29 07:12:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:54,661 INFO L495 AbstractCegarLoop]: Abstraction has 11192 states and 18345 transitions. [2023-11-29 07:12:54,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 5 states have internal predecessors, (127), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:12:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 11192 states and 18345 transitions. [2023-11-29 07:12:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-29 07:12:54,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:54,670 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:54,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 07:12:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 07:12:54,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:54,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1098701891, now seen corresponding path program 1 times [2023-11-29 07:12:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:54,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949825861] [2023-11-29 07:12:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:54,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:54,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898408013] [2023-11-29 07:12:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:54,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:54,943 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:54,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 07:12:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:55,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:12:55,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4243 proven. 129 refuted. 0 times theorem prover too weak. 4740 trivial. 0 not checked. [2023-11-29 07:12:55,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:12:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 72 proven. 129 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 07:12:56,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949825861] [2023-11-29 07:12:56,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898408013] [2023-11-29 07:12:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898408013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:12:56,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:12:56,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2023-11-29 07:12:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222925412] [2023-11-29 07:12:56,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:12:56,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:12:56,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:56,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:12:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:12:56,186 INFO L87 Difference]: Start difference. First operand 11192 states and 18345 transitions. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 3 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 3 states have call predecessors, (112), 3 states have call successors, (112) [2023-11-29 07:12:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:57,213 INFO L93 Difference]: Finished difference Result 22316 states and 36517 transitions. [2023-11-29 07:12:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:12:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 3 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 3 states have call predecessors, (112), 3 states have call successors, (112) Word has length 464 [2023-11-29 07:12:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:57,236 INFO L225 Difference]: With dead ends: 22316 [2023-11-29 07:12:57,236 INFO L226 Difference]: Without dead ends: 11298 [2023-11-29 07:12:57,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 917 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-29 07:12:57,249 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 441 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:57,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 1563 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 07:12:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11298 states. [2023-11-29 07:12:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11298 to 11244. [2023-11-29 07:12:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11244 states, 10187 states have (on average 1.5963482870324923) internal successors, (16262), 10197 states have internal predecessors, (16262), 1004 states have call successors, (1004), 52 states have call predecessors, (1004), 52 states have return successors, (1004), 994 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-29 07:12:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11244 states to 11244 states and 18270 transitions. [2023-11-29 07:12:57,874 INFO L78 Accepts]: Start accepts. Automaton has 11244 states and 18270 transitions. Word has length 464 [2023-11-29 07:12:57,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:12:57,875 INFO L495 AbstractCegarLoop]: Abstraction has 11244 states and 18270 transitions. [2023-11-29 07:12:57,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 3 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 3 states have call predecessors, (112), 3 states have call successors, (112) [2023-11-29 07:12:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 11244 states and 18270 transitions. [2023-11-29 07:12:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2023-11-29 07:12:57,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:12:57,890 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:12:57,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 07:12:58,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 07:12:58,090 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:12:58,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:12:58,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1193174278, now seen corresponding path program 1 times [2023-11-29 07:12:58,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:12:58,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554065988] [2023-11-29 07:12:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:12:58,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:12:58,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966819953] [2023-11-29 07:12:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:12:58,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:12:58,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:12:58,155 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:12:58,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 07:12:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:12:58,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:12:58,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:12:58,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4603 proven. 93 refuted. 0 times theorem prover too weak. 4416 trivial. 0 not checked. [2023-11-29 07:12:58,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:12:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 108 proven. 93 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 07:12:59,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:12:59,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554065988] [2023-11-29 07:12:59,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:12:59,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966819953] [2023-11-29 07:12:59,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966819953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:12:59,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:12:59,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 07:12:59,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644544841] [2023-11-29 07:12:59,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:12:59,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 07:12:59,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:12:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 07:12:59,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 07:12:59,062 INFO L87 Difference]: Start difference. First operand 11244 states and 18270 transitions. Second operand has 10 states, 10 states have (on average 16.4) internal successors, (164), 10 states have internal predecessors, (164), 3 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 3 states have call predecessors, (100), 3 states have call successors, (100) [2023-11-29 07:12:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:12:59,754 INFO L93 Difference]: Finished difference Result 22436 states and 36384 transitions. [2023-11-29 07:12:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:12:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.4) internal successors, (164), 10 states have internal predecessors, (164), 3 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 3 states have call predecessors, (100), 3 states have call successors, (100) Word has length 465 [2023-11-29 07:12:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:12:59,777 INFO L225 Difference]: With dead ends: 22436 [2023-11-29 07:12:59,777 INFO L226 Difference]: Without dead ends: 11330 [2023-11-29 07:12:59,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 920 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-29 07:12:59,789 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 678 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:12:59,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1071 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:12:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11330 states. [2023-11-29 07:13:00,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11330 to 11276. [2023-11-29 07:13:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11276 states, 10206 states have (on average 1.5913188320595728) internal successors, (16241), 10216 states have internal predecessors, (16241), 1004 states have call successors, (1004), 65 states have call predecessors, (1004), 65 states have return successors, (1004), 994 states have call predecessors, (1004), 1004 states have call successors, (1004) [2023-11-29 07:13:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11276 states to 11276 states and 18249 transitions. [2023-11-29 07:13:00,740 INFO L78 Accepts]: Start accepts. Automaton has 11276 states and 18249 transitions. Word has length 465 [2023-11-29 07:13:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:00,740 INFO L495 AbstractCegarLoop]: Abstraction has 11276 states and 18249 transitions. [2023-11-29 07:13:00,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.4) internal successors, (164), 10 states have internal predecessors, (164), 3 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 3 states have call predecessors, (100), 3 states have call successors, (100) [2023-11-29 07:13:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 11276 states and 18249 transitions. [2023-11-29 07:13:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2023-11-29 07:13:00,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:00,752 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:00,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 07:13:00,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:00,952 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:00,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2023744518, now seen corresponding path program 1 times [2023-11-29 07:13:00,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:00,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716001485] [2023-11-29 07:13:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:00,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:01,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:01,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073183542] [2023-11-29 07:13:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:01,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:01,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:01,023 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:01,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 07:13:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:01,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 07:13:01,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 3217 proven. 156 refuted. 0 times theorem prover too weak. 5739 trivial. 0 not checked. [2023-11-29 07:13:02,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:13:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 07:13:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:13:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716001485] [2023-11-29 07:13:03,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:13:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073183542] [2023-11-29 07:13:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073183542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:13:03,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:13:03,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 07:13:03,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397175632] [2023-11-29 07:13:03,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:13:03,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 07:13:03,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:13:03,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 07:13:03,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-29 07:13:03,234 INFO L87 Difference]: Start difference. First operand 11276 states and 18249 transitions. Second operand has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 07:13:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:13:07,429 INFO L93 Difference]: Finished difference Result 38734 states and 62202 transitions. [2023-11-29 07:13:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 07:13:07,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 465 [2023-11-29 07:13:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:13:07,474 INFO L225 Difference]: With dead ends: 38734 [2023-11-29 07:13:07,474 INFO L226 Difference]: Without dead ends: 27648 [2023-11-29 07:13:07,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 926 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=768, Invalid=2202, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 07:13:07,486 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 4538 mSDsluCounter, 4941 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 1105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4570 SdHoareTripleChecker+Valid, 5303 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:13:07,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4570 Valid, 5303 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 07:13:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27648 states. [2023-11-29 07:13:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27648 to 18566. [2023-11-29 07:13:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18566 states, 16735 states have (on average 1.5800418285031372) internal successors, (26442), 16771 states have internal predecessors, (26442), 1684 states have call successors, (1684), 146 states have call predecessors, (1684), 146 states have return successors, (1684), 1648 states have call predecessors, (1684), 1684 states have call successors, (1684) [2023-11-29 07:13:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18566 states to 18566 states and 29810 transitions. [2023-11-29 07:13:08,784 INFO L78 Accepts]: Start accepts. Automaton has 18566 states and 29810 transitions. Word has length 465 [2023-11-29 07:13:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:08,784 INFO L495 AbstractCegarLoop]: Abstraction has 18566 states and 29810 transitions. [2023-11-29 07:13:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.692307692307692) internal successors, (204), 13 states have internal predecessors, (204), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 07:13:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 18566 states and 29810 transitions. [2023-11-29 07:13:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2023-11-29 07:13:08,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:08,796 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:08,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 07:13:08,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:08,997 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:08,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1623990782, now seen corresponding path program 1 times [2023-11-29 07:13:08,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:08,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220607714] [2023-11-29 07:13:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:08,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:09,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:09,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560770801] [2023-11-29 07:13:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:09,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:09,063 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:09,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 07:13:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:09,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 07:13:09,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4551 proven. 87 refuted. 0 times theorem prover too weak. 4474 trivial. 0 not checked. [2023-11-29 07:13:11,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:13:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 114 proven. 87 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 07:13:13,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:13:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220607714] [2023-11-29 07:13:13,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:13:13,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560770801] [2023-11-29 07:13:13,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560770801] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:13:13,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:13:13,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2023-11-29 07:13:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072075738] [2023-11-29 07:13:13,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:13:13,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 07:13:13,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:13:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 07:13:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-29 07:13:13,741 INFO L87 Difference]: Start difference. First operand 18566 states and 29810 transitions. Second operand has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 07:13:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:13:21,168 INFO L93 Difference]: Finished difference Result 68522 states and 111140 transitions. [2023-11-29 07:13:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 07:13:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 465 [2023-11-29 07:13:21,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:13:21,234 INFO L225 Difference]: With dead ends: 68522 [2023-11-29 07:13:21,235 INFO L226 Difference]: Without dead ends: 50150 [2023-11-29 07:13:21,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 917 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=947, Invalid=2835, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 07:13:21,254 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 6004 mSDsluCounter, 5212 mSDsCounter, 0 mSdLazyCounter, 3903 mSolverCounterSat, 1072 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6077 SdHoareTripleChecker+Valid, 5736 SdHoareTripleChecker+Invalid, 4975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1072 IncrementalHoareTripleChecker+Valid, 3903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:13:21,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6077 Valid, 5736 Invalid, 4975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1072 Valid, 3903 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 07:13:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50150 states. [2023-11-29 07:13:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50150 to 35456. [2023-11-29 07:13:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35456 states, 32531 states have (on average 1.5949709507854046) internal successors, (51886), 32623 states have internal predecessors, (51886), 2646 states have call successors, (2646), 278 states have call predecessors, (2646), 278 states have return successors, (2646), 2554 states have call predecessors, (2646), 2646 states have call successors, (2646) [2023-11-29 07:13:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35456 states to 35456 states and 57178 transitions. [2023-11-29 07:13:23,018 INFO L78 Accepts]: Start accepts. Automaton has 35456 states and 57178 transitions. Word has length 465 [2023-11-29 07:13:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:23,019 INFO L495 AbstractCegarLoop]: Abstraction has 35456 states and 57178 transitions. [2023-11-29 07:13:23,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 12.947368421052632) internal successors, (246), 19 states have internal predecessors, (246), 4 states have call successors, (136), 3 states have call predecessors, (136), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 07:13:23,019 INFO L276 IsEmpty]: Start isEmpty. Operand 35456 states and 57178 transitions. [2023-11-29 07:13:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 07:13:23,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:23,030 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:23,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 07:13:23,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 07:13:23,230 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:23,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash -102142905, now seen corresponding path program 1 times [2023-11-29 07:13:23,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:23,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501905310] [2023-11-29 07:13:23,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:23,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:23,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:23,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716781382] [2023-11-29 07:13:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:23,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:23,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:23,288 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:23,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 07:13:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:23,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:13:23,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:13:24,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:13:24,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:13:24,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501905310] [2023-11-29 07:13:24,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:13:24,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716781382] [2023-11-29 07:13:24,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716781382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:13:24,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:13:24,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:13:24,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111560274] [2023-11-29 07:13:24,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:13:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:13:24,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:13:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:13:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:13:24,112 INFO L87 Difference]: Start difference. First operand 35456 states and 57178 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:13:27,053 INFO L93 Difference]: Finished difference Result 117312 states and 190462 transitions. [2023-11-29 07:13:27,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 07:13:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 467 [2023-11-29 07:13:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:13:27,155 INFO L225 Difference]: With dead ends: 117312 [2023-11-29 07:13:27,155 INFO L226 Difference]: Without dead ends: 82058 [2023-11-29 07:13:27,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:13:27,175 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 1615 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:13:27,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 2112 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:13:27,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82058 states. [2023-11-29 07:13:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82058 to 70708. [2023-11-29 07:13:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70708 states, 64935 states have (on average 1.5858627858627858) internal successors, (102978), 65119 states have internal predecessors, (102978), 5224 states have call successors, (5224), 548 states have call predecessors, (5224), 548 states have return successors, (5224), 5040 states have call predecessors, (5224), 5224 states have call successors, (5224) [2023-11-29 07:13:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70708 states to 70708 states and 113426 transitions. [2023-11-29 07:13:30,579 INFO L78 Accepts]: Start accepts. Automaton has 70708 states and 113426 transitions. Word has length 467 [2023-11-29 07:13:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:30,579 INFO L495 AbstractCegarLoop]: Abstraction has 70708 states and 113426 transitions. [2023-11-29 07:13:30,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 70708 states and 113426 transitions. [2023-11-29 07:13:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-29 07:13:30,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:30,598 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:30,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 07:13:30,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 07:13:30,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:30,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1615925388, now seen corresponding path program 1 times [2023-11-29 07:13:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019375547] [2023-11-29 07:13:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:30,855 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:30,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574858136] [2023-11-29 07:13:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:30,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:30,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:30,857 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:30,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 07:13:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:31,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:13:31,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:13:31,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:13:31,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:13:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019375547] [2023-11-29 07:13:31,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:13:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574858136] [2023-11-29 07:13:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574858136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:13:31,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:13:31,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:13:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452669772] [2023-11-29 07:13:31,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:13:31,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:13:31,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:13:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:13:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:13:31,267 INFO L87 Difference]: Start difference. First operand 70708 states and 113426 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:13:33,506 INFO L93 Difference]: Finished difference Result 104286 states and 167747 transitions. [2023-11-29 07:13:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:13:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 468 [2023-11-29 07:13:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:13:33,616 INFO L225 Difference]: With dead ends: 104286 [2023-11-29 07:13:33,616 INFO L226 Difference]: Without dead ends: 71116 [2023-11-29 07:13:33,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 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 07:13:33,638 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 0 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:13:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 845 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 07:13:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71116 states. [2023-11-29 07:13:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71116 to 71116. [2023-11-29 07:13:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71116 states, 65343 states have (on average 1.5822046737982645) internal successors, (103386), 65527 states have internal predecessors, (103386), 5224 states have call successors, (5224), 548 states have call predecessors, (5224), 548 states have return successors, (5224), 5040 states have call predecessors, (5224), 5224 states have call successors, (5224) [2023-11-29 07:13:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71116 states to 71116 states and 113834 transitions. [2023-11-29 07:13:37,307 INFO L78 Accepts]: Start accepts. Automaton has 71116 states and 113834 transitions. Word has length 468 [2023-11-29 07:13:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:37,308 INFO L495 AbstractCegarLoop]: Abstraction has 71116 states and 113834 transitions. [2023-11-29 07:13:37,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 71116 states and 113834 transitions. [2023-11-29 07:13:37,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-29 07:13:37,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:37,326 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:37,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 07:13:37,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 07:13:37,527 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:37,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash 429538652, now seen corresponding path program 1 times [2023-11-29 07:13:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:37,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648882114] [2023-11-29 07:13:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:37,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:37,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922588429] [2023-11-29 07:13:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:37,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:37,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:37,571 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:37,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 07:13:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:37,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:13:37,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 2901 proven. 162 refuted. 0 times theorem prover too weak. 6049 trivial. 0 not checked. [2023-11-29 07:13:38,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:13:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 39 proven. 162 refuted. 0 times theorem prover too weak. 8911 trivial. 0 not checked. [2023-11-29 07:13:38,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:13:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648882114] [2023-11-29 07:13:38,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:13:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922588429] [2023-11-29 07:13:38,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922588429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:13:38,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:13:38,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 07:13:38,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707292750] [2023-11-29 07:13:38,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:13:38,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:13:38,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:13:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:13:38,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:13:38,519 INFO L87 Difference]: Start difference. First operand 71116 states and 113834 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-29 07:13:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:13:39,344 INFO L93 Difference]: Finished difference Result 74038 states and 118336 transitions. [2023-11-29 07:13:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:13:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) Word has length 468 [2023-11-29 07:13:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:13:39,350 INFO L225 Difference]: With dead ends: 74038 [2023-11-29 07:13:39,350 INFO L226 Difference]: Without dead ends: 3110 [2023-11-29 07:13:39,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 928 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:13:39,378 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 456 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:13:39,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 836 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:13:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2023-11-29 07:13:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2871. [2023-11-29 07:13:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2493 states have (on average 1.4821500200561573) internal successors, (3695), 2493 states have internal predecessors, (3695), 340 states have call successors, (340), 37 states have call predecessors, (340), 37 states have return successors, (340), 340 states have call predecessors, (340), 340 states have call successors, (340) [2023-11-29 07:13:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 4375 transitions. [2023-11-29 07:13:39,534 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 4375 transitions. Word has length 468 [2023-11-29 07:13:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:39,535 INFO L495 AbstractCegarLoop]: Abstraction has 2871 states and 4375 transitions. [2023-11-29 07:13:39,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 2 states have call predecessors, (123), 2 states have call successors, (123) [2023-11-29 07:13:39,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 4375 transitions. [2023-11-29 07:13:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-29 07:13:39,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:39,537 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:39,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 07:13:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 07:13:39,738 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:39,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1877061987, now seen corresponding path program 1 times [2023-11-29 07:13:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:39,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773265572] [2023-11-29 07:13:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:39,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:39,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76186863] [2023-11-29 07:13:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:39,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:39,789 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:39,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 07:13:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:40,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:13:40,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:13:41,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:13:41,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:13:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773265572] [2023-11-29 07:13:41,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:13:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76186863] [2023-11-29 07:13:41,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76186863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:13:41,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:13:41,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:13:41,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182487878] [2023-11-29 07:13:41,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:13:41,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:13:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:13:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:13:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:13:41,066 INFO L87 Difference]: Start difference. First operand 2871 states and 4375 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:13:41,366 INFO L93 Difference]: Finished difference Result 7979 states and 12221 transitions. [2023-11-29 07:13:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:13:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 469 [2023-11-29 07:13:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:13:41,373 INFO L225 Difference]: With dead ends: 7979 [2023-11-29 07:13:41,373 INFO L226 Difference]: Without dead ends: 5465 [2023-11-29 07:13:41,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 466 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 07:13:41,377 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 209 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:13:41,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1295 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:13:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2023-11-29 07:13:41,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5447. [2023-11-29 07:13:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5447 states, 4769 states have (on average 1.4852170266303208) internal successors, (7083), 4769 states have internal predecessors, (7083), 612 states have call successors, (612), 65 states have call predecessors, (612), 65 states have return successors, (612), 612 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 07:13:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5447 states to 5447 states and 8307 transitions. [2023-11-29 07:13:41,710 INFO L78 Accepts]: Start accepts. Automaton has 5447 states and 8307 transitions. Word has length 469 [2023-11-29 07:13:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:41,711 INFO L495 AbstractCegarLoop]: Abstraction has 5447 states and 8307 transitions. [2023-11-29 07:13:41,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5447 states and 8307 transitions. [2023-11-29 07:13:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:13:41,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:41,714 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:41,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 07:13:41,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 07:13:41,914 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:41,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1290285684, now seen corresponding path program 1 times [2023-11-29 07:13:41,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:41,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499948957] [2023-11-29 07:13:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:41,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:41,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392268570] [2023-11-29 07:13:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:41,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:41,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:41,967 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:41,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 07:13:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:42,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 07:13:42,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:13:42,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:13:42,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:13:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499948957] [2023-11-29 07:13:42,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:13:42,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392268570] [2023-11-29 07:13:42,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392268570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:13:42,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:13:42,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 07:13:42,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801847108] [2023-11-29 07:13:42,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:13:42,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 07:13:42,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:13:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 07:13:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:13:42,744 INFO L87 Difference]: Start difference. First operand 5447 states and 8307 transitions. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 8 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:13:45,171 INFO L93 Difference]: Finished difference Result 26540 states and 40562 transitions. [2023-11-29 07:13:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 07:13:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 8 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 470 [2023-11-29 07:13:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:13:45,199 INFO L225 Difference]: With dead ends: 26540 [2023-11-29 07:13:45,199 INFO L226 Difference]: Without dead ends: 21426 [2023-11-29 07:13:45,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-11-29 07:13:45,208 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 2443 mSDsluCounter, 2538 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2443 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:13:45,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2443 Valid, 3228 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 07:13:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21426 states. [2023-11-29 07:13:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21426 to 15446. [2023-11-29 07:13:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15446 states, 13976 states have (on average 1.4948483113909559) internal successors, (20892), 13992 states have internal predecessors, (20892), 1300 states have call successors, (1300), 169 states have call predecessors, (1300), 169 states have return successors, (1300), 1284 states have call predecessors, (1300), 1300 states have call successors, (1300) [2023-11-29 07:13:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15446 states to 15446 states and 23492 transitions. [2023-11-29 07:13:46,333 INFO L78 Accepts]: Start accepts. Automaton has 15446 states and 23492 transitions. Word has length 470 [2023-11-29 07:13:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:13:46,333 INFO L495 AbstractCegarLoop]: Abstraction has 15446 states and 23492 transitions. [2023-11-29 07:13:46,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 8 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:13:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 15446 states and 23492 transitions. [2023-11-29 07:13:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:13:46,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:13:46,341 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:13:46,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 07:13:46,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:46,541 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:13:46,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:13:46,542 INFO L85 PathProgramCache]: Analyzing trace with hash -325463431, now seen corresponding path program 1 times [2023-11-29 07:13:46,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:13:46,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381516423] [2023-11-29 07:13:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:46,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:13:46,610 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:13:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027500200] [2023-11-29 07:13:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:13:46,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:13:46,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:13:46,612 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:13:46,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 07:13:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:13:47,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 07:13:47,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:13:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 5425 proven. 432 refuted. 0 times theorem prover too weak. 3255 trivial. 0 not checked. [2023-11-29 07:13:50,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:14:22,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:14:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381516423] [2023-11-29 07:14:22,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:14:22,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027500200] [2023-11-29 07:14:22,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027500200] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:14:22,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:14:22,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 07:14:22,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025834393] [2023-11-29 07:14:22,901 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 07:14:22,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 07:14:22,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:14:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 07:14:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=528, Unknown=1, NotChecked=0, Total=650 [2023-11-29 07:14:22,903 INFO L87 Difference]: Start difference. First operand 15446 states and 23492 transitions. Second operand has 20 states, 20 states have (on average 7.55) internal successors, (151), 18 states have internal predecessors, (151), 5 states have call successors, (68), 5 states have call predecessors, (68), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) [2023-11-29 07:14:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:14:28,008 INFO L93 Difference]: Finished difference Result 36446 states and 55403 transitions. [2023-11-29 07:14:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 07:14:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.55) internal successors, (151), 18 states have internal predecessors, (151), 5 states have call successors, (68), 5 states have call predecessors, (68), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) Word has length 470 [2023-11-29 07:14:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:14:28,036 INFO L225 Difference]: With dead ends: 36446 [2023-11-29 07:14:28,036 INFO L226 Difference]: Without dead ends: 23068 [2023-11-29 07:14:28,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=536, Invalid=2013, Unknown=1, NotChecked=0, Total=2550 [2023-11-29 07:14:28,050 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 1225 mSDsluCounter, 3717 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 4079 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:14:28,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 4079 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 07:14:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2023-11-29 07:14:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 19076. [2023-11-29 07:14:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19076 states, 17434 states have (on average 1.4983939428702535) internal successors, (26123), 17474 states have internal predecessors, (26123), 1444 states have call successors, (1444), 197 states have call predecessors, (1444), 197 states have return successors, (1444), 1404 states have call predecessors, (1444), 1444 states have call successors, (1444) [2023-11-29 07:14:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19076 states to 19076 states and 29011 transitions. [2023-11-29 07:14:29,010 INFO L78 Accepts]: Start accepts. Automaton has 19076 states and 29011 transitions. Word has length 470 [2023-11-29 07:14:29,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:14:29,011 INFO L495 AbstractCegarLoop]: Abstraction has 19076 states and 29011 transitions. [2023-11-29 07:14:29,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.55) internal successors, (151), 18 states have internal predecessors, (151), 5 states have call successors, (68), 5 states have call predecessors, (68), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) [2023-11-29 07:14:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 19076 states and 29011 transitions. [2023-11-29 07:14:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:14:29,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:14:29,018 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:29,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 07:14:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:14:29,218 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:14:29,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:14:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1655731781, now seen corresponding path program 1 times [2023-11-29 07:14:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:14:29,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015188497] [2023-11-29 07:14:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:14:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:14:29,271 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:14:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937530890] [2023-11-29 07:14:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:14:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:14:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:14:29,272 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:14:29,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 07:14:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:14:29,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 07:14:29,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:14:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:14:31,485 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:14:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:14:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015188497] [2023-11-29 07:14:31,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:14:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937530890] [2023-11-29 07:14:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937530890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:14:31,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:14:31,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:14:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222539560] [2023-11-29 07:14:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:14:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:14:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:14:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:14:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:14:31,488 INFO L87 Difference]: Start difference. First operand 19076 states and 29011 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:14:32,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:14:32,628 INFO L93 Difference]: Finished difference Result 34476 states and 52392 transitions. [2023-11-29 07:14:32,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:14:32,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 470 [2023-11-29 07:14:32,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:14:32,653 INFO L225 Difference]: With dead ends: 34476 [2023-11-29 07:14:32,654 INFO L226 Difference]: Without dead ends: 19246 [2023-11-29 07:14:32,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:14:32,667 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 270 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:14:32,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1190 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:14:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19246 states. [2023-11-29 07:14:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19246 to 19076. [2023-11-29 07:14:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19076 states, 17434 states have (on average 1.4980497877710222) internal successors, (26117), 17474 states have internal predecessors, (26117), 1444 states have call successors, (1444), 197 states have call predecessors, (1444), 197 states have return successors, (1444), 1404 states have call predecessors, (1444), 1444 states have call successors, (1444) [2023-11-29 07:14:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19076 states to 19076 states and 29005 transitions. [2023-11-29 07:14:33,701 INFO L78 Accepts]: Start accepts. Automaton has 19076 states and 29005 transitions. Word has length 470 [2023-11-29 07:14:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:14:33,702 INFO L495 AbstractCegarLoop]: Abstraction has 19076 states and 29005 transitions. [2023-11-29 07:14:33,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:14:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 19076 states and 29005 transitions. [2023-11-29 07:14:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:14:33,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:14:33,709 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:14:33,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 07:14:33,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:14:33,909 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:14:33,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:14:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1578830983, now seen corresponding path program 1 times [2023-11-29 07:14:33,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:14:33,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499193622] [2023-11-29 07:14:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:14:33,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:14:33,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:14:33,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191355056] [2023-11-29 07:14:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:14:33,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:14:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:14:33,966 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:14:33,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 07:14:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:14:34,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 07:14:34,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:14:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 5296 proven. 357 refuted. 0 times theorem prover too weak. 3459 trivial. 0 not checked. [2023-11-29 07:14:37,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:14:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 228 proven. 366 refuted. 0 times theorem prover too weak. 8518 trivial. 0 not checked. [2023-11-29 07:14:43,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:14:43,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499193622] [2023-11-29 07:14:43,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:14:43,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191355056] [2023-11-29 07:14:43,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191355056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:14:43,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:14:43,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2023-11-29 07:14:43,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328072028] [2023-11-29 07:14:43,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:14:43,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 07:14:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:14:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 07:14:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2023-11-29 07:14:43,505 INFO L87 Difference]: Start difference. First operand 19076 states and 29005 transitions. Second operand has 27 states, 26 states have (on average 10.423076923076923) internal successors, (271), 25 states have internal predecessors, (271), 8 states have call successors, (136), 5 states have call predecessors, (136), 10 states have return successors, (136), 8 states have call predecessors, (136), 8 states have call successors, (136) [2023-11-29 07:15:06,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 07:15:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:15:13,461 INFO L93 Difference]: Finished difference Result 54514 states and 82845 transitions. [2023-11-29 07:15:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 07:15:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 10.423076923076923) internal successors, (271), 25 states have internal predecessors, (271), 8 states have call successors, (136), 5 states have call predecessors, (136), 10 states have return successors, (136), 8 states have call predecessors, (136), 8 states have call successors, (136) Word has length 470 [2023-11-29 07:15:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:15:13,505 INFO L225 Difference]: With dead ends: 54514 [2023-11-29 07:15:13,505 INFO L226 Difference]: Without dead ends: 36240 [2023-11-29 07:15:13,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 922 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1270, Invalid=3560, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 07:15:13,521 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 3375 mSDsluCounter, 3608 mSDsCounter, 0 mSdLazyCounter, 4079 mSolverCounterSat, 917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3412 SdHoareTripleChecker+Valid, 4153 SdHoareTripleChecker+Invalid, 4996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 917 IncrementalHoareTripleChecker+Valid, 4079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:15:13,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3412 Valid, 4153 Invalid, 4996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [917 Valid, 4079 Invalid, 0 Unknown, 0 Unchecked, 17.0s Time] [2023-11-29 07:15:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36240 states. [2023-11-29 07:15:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36240 to 29006. [2023-11-29 07:15:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29006 states, 27364 states have (on average 1.52686010817132) internal successors, (41781), 27404 states have internal predecessors, (41781), 1444 states have call successors, (1444), 197 states have call predecessors, (1444), 197 states have return successors, (1444), 1404 states have call predecessors, (1444), 1444 states have call successors, (1444) [2023-11-29 07:15:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29006 states to 29006 states and 44669 transitions. [2023-11-29 07:15:15,849 INFO L78 Accepts]: Start accepts. Automaton has 29006 states and 44669 transitions. Word has length 470 [2023-11-29 07:15:15,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:15:15,850 INFO L495 AbstractCegarLoop]: Abstraction has 29006 states and 44669 transitions. [2023-11-29 07:15:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 10.423076923076923) internal successors, (271), 25 states have internal predecessors, (271), 8 states have call successors, (136), 5 states have call predecessors, (136), 10 states have return successors, (136), 8 states have call predecessors, (136), 8 states have call successors, (136) [2023-11-29 07:15:15,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29006 states and 44669 transitions. [2023-11-29 07:15:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:15:15,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:15:15,859 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:15:15,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 07:15:16,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:15:16,060 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:15:16,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:15:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash 638799415, now seen corresponding path program 1 times [2023-11-29 07:15:16,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:15:16,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656727006] [2023-11-29 07:15:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:15:16,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:15:16,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:15:16,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955364581] [2023-11-29 07:15:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:15:16,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:15:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:15:16,107 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:15:16,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 07:15:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:15:16,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 07:15:16,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:16:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 2656 proven. 60 refuted. 0 times theorem prover too weak. 6396 trivial. 0 not checked. [2023-11-29 07:16:01,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:17:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:17:18,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:17:18,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656727006] [2023-11-29 07:17:18,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:17:18,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955364581] [2023-11-29 07:17:18,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955364581] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 07:17:18,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:17:18,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [21] total 33 [2023-11-29 07:17:18,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660394444] [2023-11-29 07:17:18,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:17:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 07:17:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:17:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 07:17:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=840, Unknown=2, NotChecked=0, Total=1056 [2023-11-29 07:17:18,340 INFO L87 Difference]: Start difference. First operand 29006 states and 44669 transitions. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:17:25,372 WARN L293 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 183 DAG size of output: 117 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 07:17:36,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:38,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:43,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:44,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:46,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:48,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:51,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:55,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:17:56,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:00,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:01,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:06,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:08,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:14,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:15,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:20,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:24,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:18:51,997 WARN L293 SmtUtils]: Spent 7.01s on a formula simplification. DAG size of input: 178 DAG size of output: 112 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 07:18:57,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:00,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:01,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:02,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:04,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:08,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:13,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:17,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:19,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:27,359 WARN L293 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 189 DAG size of output: 130 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 07:19:31,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:19:40,450 WARN L293 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 192 DAG size of output: 133 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 07:19:53,991 WARN L293 SmtUtils]: Spent 13.03s on a formula simplification. DAG size of input: 181 DAG size of output: 124 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 07:20:09,450 WARN L293 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 185 DAG size of output: 155 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 07:20:10,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:13,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:17,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:21,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:23,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:25,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:28,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:31,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:33,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:37,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:41,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:46,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:47,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:50,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:53,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:58,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:20:59,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:21:02,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:21:09,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:21:11,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:21:13,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:21:17,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:21:20,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:21:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:21:51,306 INFO L93 Difference]: Finished difference Result 83090 states and 128998 transitions. [2023-11-29 07:21:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 07:21:51,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) Word has length 470 [2023-11-29 07:21:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:21:51,378 INFO L225 Difference]: With dead ends: 83090 [2023-11-29 07:21:51,379 INFO L226 Difference]: Without dead ends: 64328 [2023-11-29 07:21:51,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 911 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 129.4s TimeCoverageRelationStatistics Valid=429, Invalid=1728, Unknown=5, NotChecked=0, Total=2162 [2023-11-29 07:21:51,399 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1667 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 111 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:21:51,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 1556 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1654 Invalid, 12 Unknown, 0 Unchecked, 180.7s Time] [2023-11-29 07:21:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64328 states. [2023-11-29 07:21:53,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64328 to 44652. [2023-11-29 07:21:53,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44652 states, 43154 states have (on average 1.5494044584511286) internal successors, (66863), 43170 states have internal predecessors, (66863), 1300 states have call successors, (1300), 197 states have call predecessors, (1300), 197 states have return successors, (1300), 1284 states have call predecessors, (1300), 1300 states have call successors, (1300) [2023-11-29 07:21:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44652 states to 44652 states and 69463 transitions. [2023-11-29 07:21:53,772 INFO L78 Accepts]: Start accepts. Automaton has 44652 states and 69463 transitions. Word has length 470 [2023-11-29 07:21:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:21:53,772 INFO L495 AbstractCegarLoop]: Abstraction has 44652 states and 69463 transitions. [2023-11-29 07:21:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:21:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44652 states and 69463 transitions. [2023-11-29 07:21:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:21:53,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:21:53,794 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:21:53,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 07:21:53,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 07:21:53,995 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:21:53,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:21:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1300362631, now seen corresponding path program 1 times [2023-11-29 07:21:53,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:21:53,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254002847] [2023-11-29 07:21:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:21:53,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:21:54,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:21:54,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569838462] [2023-11-29 07:21:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:21:54,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:21:54,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:21:54,049 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:21:54,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 07:21:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:21:54,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 07:21:54,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:21:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 6180 proven. 354 refuted. 0 times theorem prover too weak. 2578 trivial. 0 not checked. [2023-11-29 07:21:56,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:21:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 174 proven. 225 refuted. 0 times theorem prover too weak. 8713 trivial. 0 not checked. [2023-11-29 07:21:57,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:21:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254002847] [2023-11-29 07:21:57,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:21:57,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569838462] [2023-11-29 07:21:57,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569838462] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:21:57,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:21:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2023-11-29 07:21:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023204157] [2023-11-29 07:21:57,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:21:57,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 07:21:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:21:57,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 07:21:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2023-11-29 07:21:57,851 INFO L87 Difference]: Start difference. First operand 44652 states and 69463 transitions. Second operand has 30 states, 30 states have (on average 9.066666666666666) internal successors, (272), 30 states have internal predecessors, (272), 8 states have call successors, (129), 5 states have call predecessors, (129), 11 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 07:22:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:22:11,581 INFO L93 Difference]: Finished difference Result 119304 states and 183814 transitions. [2023-11-29 07:22:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 07:22:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 9.066666666666666) internal successors, (272), 30 states have internal predecessors, (272), 8 states have call successors, (129), 5 states have call predecessors, (129), 11 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) Word has length 470 [2023-11-29 07:22:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:22:11,668 INFO L225 Difference]: With dead ends: 119304 [2023-11-29 07:22:11,668 INFO L226 Difference]: Without dead ends: 82526 [2023-11-29 07:22:11,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 994 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1531, Invalid=4475, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 07:22:11,694 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 3366 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 4696 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3367 SdHoareTripleChecker+Valid, 4328 SdHoareTripleChecker+Invalid, 5037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 4696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:22:11,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3367 Valid, 4328 Invalid, 5037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 4696 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-11-29 07:22:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82526 states. [2023-11-29 07:22:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82526 to 65584. [2023-11-29 07:22:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65584 states, 63995 states have (on average 1.5265255098054535) internal successors, (97690), 64035 states have internal predecessors, (97690), 1268 states have call successors, (1268), 320 states have call predecessors, (1268), 320 states have return successors, (1268), 1228 states have call predecessors, (1268), 1268 states have call successors, (1268) [2023-11-29 07:22:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65584 states to 65584 states and 100226 transitions. [2023-11-29 07:22:14,595 INFO L78 Accepts]: Start accepts. Automaton has 65584 states and 100226 transitions. Word has length 470 [2023-11-29 07:22:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:22:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 65584 states and 100226 transitions. [2023-11-29 07:22:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.066666666666666) internal successors, (272), 30 states have internal predecessors, (272), 8 states have call successors, (129), 5 states have call predecessors, (129), 11 states have return successors, (130), 8 states have call predecessors, (130), 8 states have call successors, (130) [2023-11-29 07:22:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 65584 states and 100226 transitions. [2023-11-29 07:22:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 07:22:14,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:22:14,609 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:14,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 07:22:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 07:22:14,810 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:22:14,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:22:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1066016445, now seen corresponding path program 1 times [2023-11-29 07:22:14,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:22:14,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842823028] [2023-11-29 07:22:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:22:14,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:22:14,851 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:22:14,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127484633] [2023-11-29 07:22:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:22:14,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:22:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:22:14,852 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:22:14,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 07:22:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:22:15,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 07:22:15,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:22:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 5238 proven. 528 refuted. 0 times theorem prover too weak. 3346 trivial. 0 not checked. [2023-11-29 07:22:20,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:23:08,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:23:08,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842823028] [2023-11-29 07:23:08,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:23:08,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127484633] [2023-11-29 07:23:08,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127484633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:23:08,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:23:08,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 07:23:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299091229] [2023-11-29 07:23:08,141 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 07:23:08,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 07:23:08,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:23:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 07:23:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=501, Unknown=1, NotChecked=0, Total=600 [2023-11-29 07:23:08,143 INFO L87 Difference]: Start difference. First operand 65584 states and 100226 transitions. Second operand has 20 states, 20 states have (on average 7.6) internal successors, (152), 17 states have internal predecessors, (152), 5 states have call successors, (68), 5 states have call predecessors, (68), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) [2023-11-29 07:23:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:23:17,336 INFO L93 Difference]: Finished difference Result 122816 states and 186391 transitions. [2023-11-29 07:23:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 07:23:17,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.6) internal successors, (152), 17 states have internal predecessors, (152), 5 states have call successors, (68), 5 states have call predecessors, (68), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) Word has length 471 [2023-11-29 07:23:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:23:17,410 INFO L225 Difference]: With dead ends: 122816 [2023-11-29 07:23:17,410 INFO L226 Difference]: Without dead ends: 70526 [2023-11-29 07:23:17,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 538 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=392, Invalid=1587, Unknown=1, NotChecked=0, Total=1980 [2023-11-29 07:23:17,441 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 2063 mSDsluCounter, 3279 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2063 SdHoareTripleChecker+Valid, 3832 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:23:17,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2063 Valid, 3832 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 07:23:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70526 states. [2023-11-29 07:23:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70526 to 65584. [2023-11-29 07:23:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65584 states, 63995 states have (on average 1.5257754512071255) internal successors, (97642), 64035 states have internal predecessors, (97642), 1268 states have call successors, (1268), 320 states have call predecessors, (1268), 320 states have return successors, (1268), 1228 states have call predecessors, (1268), 1268 states have call successors, (1268) [2023-11-29 07:23:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65584 states to 65584 states and 100178 transitions. [2023-11-29 07:23:20,531 INFO L78 Accepts]: Start accepts. Automaton has 65584 states and 100178 transitions. Word has length 471 [2023-11-29 07:23:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:23:20,532 INFO L495 AbstractCegarLoop]: Abstraction has 65584 states and 100178 transitions. [2023-11-29 07:23:20,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.6) internal successors, (152), 17 states have internal predecessors, (152), 5 states have call successors, (68), 5 states have call predecessors, (68), 7 states have return successors, (68), 5 states have call predecessors, (68), 5 states have call successors, (68) [2023-11-29 07:23:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 65584 states and 100178 transitions. [2023-11-29 07:23:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 07:23:20,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:23:20,544 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:23:20,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 07:23:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:23:20,745 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:23:20,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:23:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1093082047, now seen corresponding path program 1 times [2023-11-29 07:23:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:23:20,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545898534] [2023-11-29 07:23:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:23:20,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:23:20,789 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:23:20,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769003296] [2023-11-29 07:23:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:23:20,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:23:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:23:20,791 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:23:20,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 07:23:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:23:21,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 07:23:21,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:23:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 6065 proven. 720 refuted. 0 times theorem prover too weak. 2327 trivial. 0 not checked. [2023-11-29 07:23:25,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:23:57,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:23:57,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545898534] [2023-11-29 07:23:57,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:23:57,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769003296] [2023-11-29 07:23:57,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769003296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:23:57,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:23:57,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-11-29 07:23:57,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382404337] [2023-11-29 07:23:57,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 07:23:57,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 07:23:57,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:23:57,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 07:23:57,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-11-29 07:23:57,367 INFO L87 Difference]: Start difference. First operand 65584 states and 100178 transitions. Second operand has 23 states, 23 states have (on average 6.869565217391305) internal successors, (158), 20 states have internal predecessors, (158), 6 states have call successors, (68), 6 states have call predecessors, (68), 9 states have return successors, (68), 6 states have call predecessors, (68), 6 states have call successors, (68) [2023-11-29 07:24:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:24:06,347 INFO L93 Difference]: Finished difference Result 124184 states and 188647 transitions. [2023-11-29 07:24:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 07:24:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.869565217391305) internal successors, (158), 20 states have internal predecessors, (158), 6 states have call successors, (68), 6 states have call predecessors, (68), 9 states have return successors, (68), 6 states have call predecessors, (68), 6 states have call successors, (68) Word has length 471 [2023-11-29 07:24:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:24:06,421 INFO L225 Difference]: With dead ends: 124184 [2023-11-29 07:24:06,421 INFO L226 Difference]: Without dead ends: 70526 [2023-11-29 07:24:06,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 536 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=571, Invalid=1879, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 07:24:06,453 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1312 mSDsluCounter, 3789 mSDsCounter, 0 mSdLazyCounter, 2184 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 2184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:24:06,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 4210 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 2184 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 07:24:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70526 states. [2023-11-29 07:24:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70526 to 65584. [2023-11-29 07:24:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65584 states, 63995 states have (on average 1.5242753340104696) internal successors, (97546), 64035 states have internal predecessors, (97546), 1268 states have call successors, (1268), 320 states have call predecessors, (1268), 320 states have return successors, (1268), 1228 states have call predecessors, (1268), 1268 states have call successors, (1268) [2023-11-29 07:24:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65584 states to 65584 states and 100082 transitions. [2023-11-29 07:24:09,477 INFO L78 Accepts]: Start accepts. Automaton has 65584 states and 100082 transitions. Word has length 471 [2023-11-29 07:24:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:24:09,478 INFO L495 AbstractCegarLoop]: Abstraction has 65584 states and 100082 transitions. [2023-11-29 07:24:09,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.869565217391305) internal successors, (158), 20 states have internal predecessors, (158), 6 states have call successors, (68), 6 states have call predecessors, (68), 9 states have return successors, (68), 6 states have call predecessors, (68), 6 states have call successors, (68) [2023-11-29 07:24:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 65584 states and 100082 transitions. [2023-11-29 07:24:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2023-11-29 07:24:09,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:24:09,491 INFO L195 NwaCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:24:09,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 07:24:09,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 07:24:09,692 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:24:09,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:24:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1210098813, now seen corresponding path program 1 times [2023-11-29 07:24:09,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:24:09,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427508525] [2023-11-29 07:24:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:24:09,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:24:09,734 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:24:09,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674943311] [2023-11-29 07:24:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:24:09,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:24:09,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:24:09,735 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:24:09,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_170e3c92-0e7c-4bfc-935b-71c304f7778a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 07:24:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:24:10,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 07:24:10,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:24:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 2656 proven. 60 refuted. 0 times theorem prover too weak. 6396 trivial. 0 not checked. [2023-11-29 07:24:15,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:25:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9112 trivial. 0 not checked. [2023-11-29 07:25:54,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:25:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427508525] [2023-11-29 07:25:54,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:25:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674943311] [2023-11-29 07:25:54,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674943311] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 07:25:54,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:25:54,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [20] total 31 [2023-11-29 07:25:54,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361523470] [2023-11-29 07:25:54,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:25:54,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 07:25:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:25:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 07:25:54,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2023-11-29 07:25:54,652 INFO L87 Difference]: Start difference. First operand 65584 states and 100082 transitions. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 1 states have call successors, (68), 1 states have call predecessors, (68), 1 states have return successors, (68), 1 states have call predecessors, (68), 1 states have call successors, (68) [2023-11-29 07:26:25,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 07:26:35,479 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 107 DAG size of output: 102 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)