./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-89.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-89.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu --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 c364d5742786a109dce2eae30e32833d89e81ae3212872a34b0b87c86d2f2db6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:35,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:35,792 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:00:35,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:35,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:35,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:35,827 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:35,827 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:35,828 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:35,829 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:35,830 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:35,830 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:35,831 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:35,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:35,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:00:35,833 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:35,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:35,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:35,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:35,835 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:00:35,836 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:35,837 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:00:35,837 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:35,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:00:35,839 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:35,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:35,840 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:35,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:35,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:35,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:35,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:35,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:00:35,843 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:35,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:35,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:35,845 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:00:35,846 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:35,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:35,847 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:35,847 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_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c364d5742786a109dce2eae30e32833d89e81ae3212872a34b0b87c86d2f2db6 [2023-11-19 08:00:36,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:36,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:36,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:36,149 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:36,150 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:36,151 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-89.i [2023-11-19 08:00:39,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:39,825 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:39,826 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-89.i [2023-11-19 08:00:39,840 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/data/d6dbe8f64/b4997b632d2345d3addea5c24332d2d6/FLAG995c8ae6a [2023-11-19 08:00:39,852 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/data/d6dbe8f64/b4997b632d2345d3addea5c24332d2d6 [2023-11-19 08:00:39,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:39,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:39,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:39,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:39,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:39,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:39" (1/1) ... [2023-11-19 08:00:39,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68211212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:39, skipping insertion in model container [2023-11-19 08:00:39,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:39" (1/1) ... [2023-11-19 08:00:39,922 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:40,071 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_942d760a-5c8f-48cf-81b0-d5ff6de703d5/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-89.i[916,929] [2023-11-19 08:00:40,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:40,307 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:40,323 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_942d760a-5c8f-48cf-81b0-d5ff6de703d5/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-89.i[916,929] [2023-11-19 08:00:40,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:40,486 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:40,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40 WrapperNode [2023-11-19 08:00:40,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:40,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:40,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:40,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:40,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,634 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 444 [2023-11-19 08:00:40,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:40,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:40,638 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:40,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:40,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,657 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,677 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,729 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,736 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,757 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:40,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:40,771 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:40,771 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:40,772 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (1/1) ... [2023-11-19 08:00:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:40,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:40,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:40,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:00:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:00:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:40,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:40,998 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:41,001 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:42,042 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:42,053 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:42,054 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:00:42,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:42 BoogieIcfgContainer [2023-11-19 08:00:42,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:42,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:42,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:42,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:42,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:39" (1/3) ... [2023-11-19 08:00:42,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12dc0f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:42, skipping insertion in model container [2023-11-19 08:00:42,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:40" (2/3) ... [2023-11-19 08:00:42,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12dc0f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:42, skipping insertion in model container [2023-11-19 08:00:42,069 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:42" (3/3) ... [2023-11-19 08:00:42,070 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-89.i [2023-11-19 08:00:42,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:42,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:00:42,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:42,164 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;@351fc855, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:42,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:00:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 185 states, 139 states have (on average 1.5611510791366907) internal successors, (217), 140 states have internal predecessors, (217), 43 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-19 08:00:42,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-11-19 08:00:42,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:42,228 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:42,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:42,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2137416249, now seen corresponding path program 1 times [2023-11-19 08:00:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:42,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926071883] [2023-11-19 08:00:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:42,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:42,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926071883] [2023-11-19 08:00:42,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:00:42,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899539614] [2023-11-19 08:00:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:42,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:42,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:00:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:43,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:00:43,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2023-11-19 08:00:43,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:43,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899539614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:43,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:43,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861670774] [2023-11-19 08:00:43,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:43,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:00:43,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:43,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:00:43,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:43,396 INFO L87 Difference]: Start difference. First operand has 185 states, 139 states have (on average 1.5611510791366907) internal successors, (217), 140 states have internal predecessors, (217), 43 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 2 states have call successors, (43) [2023-11-19 08:00:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:43,479 INFO L93 Difference]: Finished difference Result 363 states and 643 transitions. [2023-11-19 08:00:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:00:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 2 states have call successors, (43) Word has length 298 [2023-11-19 08:00:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:43,495 INFO L225 Difference]: With dead ends: 363 [2023-11-19 08:00:43,495 INFO L226 Difference]: Without dead ends: 181 [2023-11-19 08:00:43,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:00:43,505 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:43,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-19 08:00:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-11-19 08:00:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 136 states have (on average 1.5441176470588236) internal successors, (210), 136 states have internal predecessors, (210), 43 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-19 08:00:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 296 transitions. [2023-11-19 08:00:43,598 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 296 transitions. Word has length 298 [2023-11-19 08:00:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:43,599 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 296 transitions. [2023-11-19 08:00:43,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 2 states have call successors, (43) [2023-11-19 08:00:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 296 transitions. [2023-11-19 08:00:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-11-19 08:00:43,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:43,611 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:43,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:00:43,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:43,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1146442027, now seen corresponding path program 1 times [2023-11-19 08:00:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096346908] [2023-11-19 08:00:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:44,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:44,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536438701] [2023-11-19 08:00:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:44,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:44,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:44,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:44,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:00:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:44,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:00:44,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:00:44,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:44,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:44,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096346908] [2023-11-19 08:00:44,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536438701] [2023-11-19 08:00:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536438701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:44,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:44,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:44,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237333678] [2023-11-19 08:00:44,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:44,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:44,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:44,513 INFO L87 Difference]: Start difference. First operand 181 states and 296 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:44,769 INFO L93 Difference]: Finished difference Result 504 states and 822 transitions. [2023-11-19 08:00:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:44,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 298 [2023-11-19 08:00:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:44,778 INFO L225 Difference]: With dead ends: 504 [2023-11-19 08:00:44,778 INFO L226 Difference]: Without dead ends: 326 [2023-11-19 08:00:44,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:44,783 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 225 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:44,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 669 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:44,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-11-19 08:00:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 233. [2023-11-19 08:00:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 188 states have (on average 1.5851063829787233) internal successors, (298), 188 states have internal predecessors, (298), 43 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2023-11-19 08:00:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 384 transitions. [2023-11-19 08:00:44,823 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 384 transitions. Word has length 298 [2023-11-19 08:00:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:44,826 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 384 transitions. [2023-11-19 08:00:44,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 384 transitions. [2023-11-19 08:00:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:00:44,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:44,833 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:44,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:45,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:45,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:45,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:45,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1796107940, now seen corresponding path program 1 times [2023-11-19 08:00:45,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:45,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731235567] [2023-11-19 08:00:45,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:45,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:45,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224258284] [2023-11-19 08:00:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:45,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:45,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:45,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:00:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:45,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:00:45,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:00:45,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:45,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:45,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731235567] [2023-11-19 08:00:45,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:45,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224258284] [2023-11-19 08:00:45,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224258284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:45,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:45,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:45,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125411074] [2023-11-19 08:00:45,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:45,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:45,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:45,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:45,517 INFO L87 Difference]: Start difference. First operand 233 states and 384 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:45,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:45,606 INFO L93 Difference]: Finished difference Result 619 states and 1021 transitions. [2023-11-19 08:00:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 299 [2023-11-19 08:00:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:45,613 INFO L225 Difference]: With dead ends: 619 [2023-11-19 08:00:45,613 INFO L226 Difference]: Without dead ends: 389 [2023-11-19 08:00:45,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:45,616 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 155 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:45,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 553 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-19 08:00:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 386. [2023-11-19 08:00:45,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 336 states have (on average 1.6011904761904763) internal successors, (538), 337 states have internal predecessors, (538), 47 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-19 08:00:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 632 transitions. [2023-11-19 08:00:45,700 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 632 transitions. Word has length 299 [2023-11-19 08:00:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:45,702 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 632 transitions. [2023-11-19 08:00:45,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 632 transitions. [2023-11-19 08:00:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:00:45,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:45,711 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:45,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:45,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:45,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1156449782, now seen corresponding path program 1 times [2023-11-19 08:00:45,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:45,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634272178] [2023-11-19 08:00:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:46,038 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:46,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672465176] [2023-11-19 08:00:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:46,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:46,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:00:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:46,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:00:46,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:00:46,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:46,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:46,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634272178] [2023-11-19 08:00:46,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:46,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672465176] [2023-11-19 08:00:46,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672465176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:46,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:46,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:46,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778392436] [2023-11-19 08:00:46,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:46,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:46,342 INFO L87 Difference]: Start difference. First operand 386 states and 632 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:46,433 INFO L93 Difference]: Finished difference Result 1033 states and 1684 transitions. [2023-11-19 08:00:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 299 [2023-11-19 08:00:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:46,442 INFO L225 Difference]: With dead ends: 1033 [2023-11-19 08:00:46,442 INFO L226 Difference]: Without dead ends: 650 [2023-11-19 08:00:46,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:46,445 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 141 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:46,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 611 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:00:46,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-11-19 08:00:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 647. [2023-11-19 08:00:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 585 states have (on average 1.5914529914529914) internal successors, (931), 588 states have internal predecessors, (931), 57 states have call successors, (57), 4 states have call predecessors, (57), 4 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-19 08:00:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1045 transitions. [2023-11-19 08:00:46,482 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1045 transitions. Word has length 299 [2023-11-19 08:00:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:46,483 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 1045 transitions. [2023-11-19 08:00:46,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:46,484 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1045 transitions. [2023-11-19 08:00:46,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:00:46,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:46,491 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:46,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:46,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:46,704 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:46,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:46,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1766710216, now seen corresponding path program 1 times [2023-11-19 08:00:46,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:46,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426479878] [2023-11-19 08:00:46,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:46,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:46,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579427456] [2023-11-19 08:00:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:46,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:46,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:46,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:46,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:00:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:47,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:00:47,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 42 proven. 126 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 08:00:48,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:00:49,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:49,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426479878] [2023-11-19 08:00:49,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:49,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579427456] [2023-11-19 08:00:49,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579427456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:49,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:49,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-19 08:00:49,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518582937] [2023-11-19 08:00:49,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:49,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:00:49,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:00:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:00:49,092 INFO L87 Difference]: Start difference. First operand 647 states and 1045 transitions. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 08:00:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:49,915 INFO L93 Difference]: Finished difference Result 1803 states and 2900 transitions. [2023-11-19 08:00:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:00:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) Word has length 299 [2023-11-19 08:00:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:49,932 INFO L225 Difference]: With dead ends: 1803 [2023-11-19 08:00:49,933 INFO L226 Difference]: Without dead ends: 1159 [2023-11-19 08:00:49,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2023-11-19 08:00:49,937 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 512 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:49,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1316 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:00:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2023-11-19 08:00:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1127. [2023-11-19 08:00:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1061 states have (on average 1.5692742695570217) internal successors, (1665), 1064 states have internal predecessors, (1665), 57 states have call successors, (57), 8 states have call predecessors, (57), 8 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2023-11-19 08:00:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1779 transitions. [2023-11-19 08:00:50,018 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1779 transitions. Word has length 299 [2023-11-19 08:00:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:50,019 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1779 transitions. [2023-11-19 08:00:50,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 08:00:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1779 transitions. [2023-11-19 08:00:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2023-11-19 08:00:50,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:50,025 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:50,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:50,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:50,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:50,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:50,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1052157740, now seen corresponding path program 1 times [2023-11-19 08:00:50,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:50,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610467950] [2023-11-19 08:00:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:50,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:50,309 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:50,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469354001] [2023-11-19 08:00:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:50,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:50,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:50,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:00:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:50,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 08:00:50,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 42 proven. 126 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 08:00:52,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:00:53,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:53,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610467950] [2023-11-19 08:00:53,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:53,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469354001] [2023-11-19 08:00:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469354001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:53,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-11-19 08:00:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159093262] [2023-11-19 08:00:53,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:00:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:00:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:00:53,356 INFO L87 Difference]: Start difference. First operand 1127 states and 1779 transitions. Second operand has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 4 states have call successors, (86), 3 states have call predecessors, (86), 4 states have return successors, (86), 2 states have call predecessors, (86), 4 states have call successors, (86) [2023-11-19 08:00:54,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:54,347 INFO L93 Difference]: Finished difference Result 3919 states and 6162 transitions. [2023-11-19 08:00:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:00:54,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 4 states have call successors, (86), 3 states have call predecessors, (86), 4 states have return successors, (86), 2 states have call predecessors, (86), 4 states have call successors, (86) Word has length 299 [2023-11-19 08:00:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:54,367 INFO L225 Difference]: With dead ends: 3919 [2023-11-19 08:00:54,367 INFO L226 Difference]: Without dead ends: 2795 [2023-11-19 08:00:54,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:00:54,371 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1794 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 1425 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:54,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1836 Valid, 1425 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:00:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2023-11-19 08:00:54,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2249. [2023-11-19 08:00:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2118 states have (on average 1.5684608120868744) internal successors, (3322), 2124 states have internal predecessors, (3322), 114 states have call successors, (114), 16 states have call predecessors, (114), 16 states have return successors, (114), 108 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-19 08:00:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 3550 transitions. [2023-11-19 08:00:54,492 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 3550 transitions. Word has length 299 [2023-11-19 08:00:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:54,494 INFO L495 AbstractCegarLoop]: Abstraction has 2249 states and 3550 transitions. [2023-11-19 08:00:54,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 4 states have call successors, (86), 3 states have call predecessors, (86), 4 states have return successors, (86), 2 states have call predecessors, (86), 4 states have call successors, (86) [2023-11-19 08:00:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 3550 transitions. [2023-11-19 08:00:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-19 08:00:54,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:54,503 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:54,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:54,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:54,717 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:54,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2038995018, now seen corresponding path program 1 times [2023-11-19 08:00:54,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:54,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753519678] [2023-11-19 08:00:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:54,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:54,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:54,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224299861] [2023-11-19 08:00:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:54,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:54,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:54,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:00:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:55,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:00:55,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:00:55,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:00:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753519678] [2023-11-19 08:00:55,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224299861] [2023-11-19 08:00:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224299861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:55,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:55,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781892455] [2023-11-19 08:00:55,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:55,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:55,115 INFO L87 Difference]: Start difference. First operand 2249 states and 3550 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:00:55,186 INFO L93 Difference]: Finished difference Result 4495 states and 7097 transitions. [2023-11-19 08:00:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 300 [2023-11-19 08:00:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:00:55,204 INFO L225 Difference]: With dead ends: 4495 [2023-11-19 08:00:55,205 INFO L226 Difference]: Without dead ends: 2249 [2023-11-19 08:00:55,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:55,213 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 126 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:00:55,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 456 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:00:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2023-11-19 08:00:55,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2249. [2023-11-19 08:00:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2118 states have (on average 1.5675165250236072) internal successors, (3320), 2124 states have internal predecessors, (3320), 114 states have call successors, (114), 16 states have call predecessors, (114), 16 states have return successors, (114), 108 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-19 08:00:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 3548 transitions. [2023-11-19 08:00:55,333 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 3548 transitions. Word has length 300 [2023-11-19 08:00:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:00:55,335 INFO L495 AbstractCegarLoop]: Abstraction has 2249 states and 3548 transitions. [2023-11-19 08:00:55,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:00:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 3548 transitions. [2023-11-19 08:00:55,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-19 08:00:55,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:00:55,343 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:55,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:00:55,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:55,557 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:00:55,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1379953272, now seen corresponding path program 1 times [2023-11-19 08:00:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:55,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804896605] [2023-11-19 08:00:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:55,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:55,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:00:55,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010842566] [2023-11-19 08:00:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:55,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:00:55,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:55,614 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:00:55,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:00:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:55,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 08:00:55,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:00:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 42 proven. 126 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 08:00:57,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:00:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:00:57,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:57,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804896605] [2023-11-19 08:00:57,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:00:57,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010842566] [2023-11-19 08:00:57,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010842566] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:00:57,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:00:57,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-11-19 08:00:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328624366] [2023-11-19 08:00:57,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:00:57,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 08:00:57,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 08:00:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:00:57,939 INFO L87 Difference]: Start difference. First operand 2249 states and 3548 transitions. Second operand has 16 states, 16 states have (on average 10.25) internal successors, (164), 16 states have internal predecessors, (164), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 08:01:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:00,452 INFO L93 Difference]: Finished difference Result 8816 states and 13937 transitions. [2023-11-19 08:01:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 08:01:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.25) internal successors, (164), 16 states have internal predecessors, (164), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) Word has length 300 [2023-11-19 08:01:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:00,491 INFO L225 Difference]: With dead ends: 8816 [2023-11-19 08:01:00,492 INFO L226 Difference]: Without dead ends: 6570 [2023-11-19 08:01:00,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2023-11-19 08:01:00,498 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 1363 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1363 SdHoareTripleChecker+Valid, 2038 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:00,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1363 Valid, 2038 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-19 08:01:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6570 states. [2023-11-19 08:01:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6570 to 3954. [2023-11-19 08:01:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3823 states have (on average 1.5919434998692126) internal successors, (6086), 3829 states have internal predecessors, (6086), 114 states have call successors, (114), 16 states have call predecessors, (114), 16 states have return successors, (114), 108 states have call predecessors, (114), 114 states have call successors, (114) [2023-11-19 08:01:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 6314 transitions. [2023-11-19 08:01:00,720 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 6314 transitions. Word has length 300 [2023-11-19 08:01:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:00,720 INFO L495 AbstractCegarLoop]: Abstraction has 3954 states and 6314 transitions. [2023-11-19 08:01:00,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.25) internal successors, (164), 16 states have internal predecessors, (164), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 08:01:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 6314 transitions. [2023-11-19 08:01:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-19 08:01:00,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:00,729 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:00,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:00,951 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:00,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1402585526, now seen corresponding path program 1 times [2023-11-19 08:01:00,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:00,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516003520] [2023-11-19 08:01:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:00,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:00,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:00,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664691581] [2023-11-19 08:01:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:01,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:01,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:01,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:01,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:01:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:01,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:01:01,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 918 proven. 108 refuted. 0 times theorem prover too weak. 2586 trivial. 0 not checked. [2023-11-19 08:01:01,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:01:01,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516003520] [2023-11-19 08:01:01,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:01,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664691581] [2023-11-19 08:01:01,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664691581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:01,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:01,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:01:01,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049057205] [2023-11-19 08:01:01,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:01,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:01:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:01,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:01:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:01,954 INFO L87 Difference]: Start difference. First operand 3954 states and 6314 transitions. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 08:01:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:02,407 INFO L93 Difference]: Finished difference Result 6314 states and 10120 transitions. [2023-11-19 08:01:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:01:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) Word has length 300 [2023-11-19 08:01:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:02,422 INFO L225 Difference]: With dead ends: 6314 [2023-11-19 08:01:02,422 INFO L226 Difference]: Without dead ends: 2347 [2023-11-19 08:01:02,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 592 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:01:02,428 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 170 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:02,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 625 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:01:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2023-11-19 08:01:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2338. [2023-11-19 08:01:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2224 states have (on average 1.5764388489208634) internal successors, (3506), 2227 states have internal predecessors, (3506), 100 states have call successors, (100), 13 states have call predecessors, (100), 13 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-19 08:01:02,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 3706 transitions. [2023-11-19 08:01:02,527 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 3706 transitions. Word has length 300 [2023-11-19 08:01:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:02,527 INFO L495 AbstractCegarLoop]: Abstraction has 2338 states and 3706 transitions. [2023-11-19 08:01:02,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 2 states have call successors, (79), 2 states have call predecessors, (79), 4 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 08:01:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 3706 transitions. [2023-11-19 08:01:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-19 08:01:02,533 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:02,533 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:02,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:02,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:02,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:02,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2109129271, now seen corresponding path program 1 times [2023-11-19 08:01:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:02,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956103542] [2023-11-19 08:01:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:02,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:02,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156368433] [2023-11-19 08:01:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:02,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:02,818 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:02,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:01:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:03,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:01:03,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 658 proven. 114 refuted. 0 times theorem prover too weak. 2840 trivial. 0 not checked. [2023-11-19 08:01:03,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 12 proven. 114 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:01:04,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:04,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956103542] [2023-11-19 08:01:04,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156368433] [2023-11-19 08:01:04,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156368433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:04,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:04,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:01:04,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326497437] [2023-11-19 08:01:04,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:04,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:01:04,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:04,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:01:04,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:01:04,012 INFO L87 Difference]: Start difference. First operand 2338 states and 3706 transitions. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2023-11-19 08:01:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:04,501 INFO L93 Difference]: Finished difference Result 3706 states and 5907 transitions. [2023-11-19 08:01:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:01:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) Word has length 301 [2023-11-19 08:01:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:04,512 INFO L225 Difference]: With dead ends: 3706 [2023-11-19 08:01:04,512 INFO L226 Difference]: Without dead ends: 1393 [2023-11-19 08:01:04,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 594 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:01:04,517 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 345 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:04,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 609 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:01:04,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2023-11-19 08:01:04,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 738. [2023-11-19 08:01:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 680 states have (on average 1.5647058823529412) internal successors, (1064), 681 states have internal predecessors, (1064), 49 states have call successors, (49), 8 states have call predecessors, (49), 8 states have return successors, (49), 48 states have call predecessors, (49), 49 states have call successors, (49) [2023-11-19 08:01:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1162 transitions. [2023-11-19 08:01:04,574 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1162 transitions. Word has length 301 [2023-11-19 08:01:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:04,575 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1162 transitions. [2023-11-19 08:01:04,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 2 states have call successors, (81), 2 states have call predecessors, (81), 4 states have return successors, (82), 2 states have call predecessors, (82), 2 states have call successors, (82) [2023-11-19 08:01:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1162 transitions. [2023-11-19 08:01:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2023-11-19 08:01:04,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:04,583 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:04,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:04,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:01:04,797 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:04,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1797713581, now seen corresponding path program 1 times [2023-11-19 08:01:04,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:04,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751832754] [2023-11-19 08:01:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:04,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:04,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:04,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987220218] [2023-11-19 08:01:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:04,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:04,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:04,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:04,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:01:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:05,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:01:05,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:01:05,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:05,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:05,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751832754] [2023-11-19 08:01:05,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:05,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987220218] [2023-11-19 08:01:05,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987220218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:05,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:05,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 08:01:05,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087545722] [2023-11-19 08:01:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:05,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 08:01:05,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 08:01:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-19 08:01:05,665 INFO L87 Difference]: Start difference. First operand 738 states and 1162 transitions. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:01:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:06,706 INFO L93 Difference]: Finished difference Result 3047 states and 4828 transitions. [2023-11-19 08:01:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 08:01:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 301 [2023-11-19 08:01:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:06,723 INFO L225 Difference]: With dead ends: 3047 [2023-11-19 08:01:06,724 INFO L226 Difference]: Without dead ends: 2338 [2023-11-19 08:01:06,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2023-11-19 08:01:06,727 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 906 mSDsluCounter, 3352 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 3914 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:06,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 3914 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 08:01:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2023-11-19 08:01:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 2313. [2023-11-19 08:01:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2157 states have (on average 1.563745943439963) internal successors, (3373), 2159 states have internal predecessors, (3373), 137 states have call successors, (137), 18 states have call predecessors, (137), 18 states have return successors, (137), 135 states have call predecessors, (137), 137 states have call successors, (137) [2023-11-19 08:01:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3647 transitions. [2023-11-19 08:01:06,867 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3647 transitions. Word has length 301 [2023-11-19 08:01:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:06,868 INFO L495 AbstractCegarLoop]: Abstraction has 2313 states and 3647 transitions. [2023-11-19 08:01:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 8 states have internal predecessors, (89), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:01:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3647 transitions. [2023-11-19 08:01:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:01:06,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:06,874 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:06,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:07,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 08:01:07,097 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:07,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1213864289, now seen corresponding path program 1 times [2023-11-19 08:01:07,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:07,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133725584] [2023-11-19 08:01:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:07,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:07,153 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336531903] [2023-11-19 08:01:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:07,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:07,155 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:07,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 08:01:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:07,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:01:07,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 366 proven. 120 refuted. 0 times theorem prover too weak. 3126 trivial. 0 not checked. [2023-11-19 08:01:07,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:01:08,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133725584] [2023-11-19 08:01:08,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336531903] [2023-11-19 08:01:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336531903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:08,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:08,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 08:01:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157536223] [2023-11-19 08:01:08,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:08,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:01:08,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:08,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:01:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:01:08,305 INFO L87 Difference]: Start difference. First operand 2313 states and 3647 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 3 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 3 states have call predecessors, (84), 3 states have call successors, (84) [2023-11-19 08:01:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:08,786 INFO L93 Difference]: Finished difference Result 3352 states and 5257 transitions. [2023-11-19 08:01:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:01:08,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 3 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 3 states have call predecessors, (84), 3 states have call successors, (84) Word has length 302 [2023-11-19 08:01:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:08,799 INFO L225 Difference]: With dead ends: 3352 [2023-11-19 08:01:08,799 INFO L226 Difference]: Without dead ends: 1527 [2023-11-19 08:01:08,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:01:08,804 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 313 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:08,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 553 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:01:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2023-11-19 08:01:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1521. [2023-11-19 08:01:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1360 states have (on average 1.5205882352941176) internal successors, (2068), 1362 states have internal predecessors, (2068), 137 states have call successors, (137), 23 states have call predecessors, (137), 23 states have return successors, (137), 135 states have call predecessors, (137), 137 states have call successors, (137) [2023-11-19 08:01:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2342 transitions. [2023-11-19 08:01:08,938 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2342 transitions. Word has length 302 [2023-11-19 08:01:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:08,939 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 2342 transitions. [2023-11-19 08:01:08,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 3 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 3 states have call predecessors, (84), 3 states have call successors, (84) [2023-11-19 08:01:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2342 transitions. [2023-11-19 08:01:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:01:08,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:08,944 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:08,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:09,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 08:01:09,163 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:09,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:09,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2104211485, now seen corresponding path program 1 times [2023-11-19 08:01:09,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:09,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523978149] [2023-11-19 08:01:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:09,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:09,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:09,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559562044] [2023-11-19 08:01:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:09,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:09,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:09,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:09,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 08:01:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:09,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 08:01:09,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 42 proven. 126 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2023-11-19 08:01:10,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:01:11,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:11,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523978149] [2023-11-19 08:01:11,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:11,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559562044] [2023-11-19 08:01:11,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559562044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:11,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:11,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-11-19 08:01:11,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817494055] [2023-11-19 08:01:11,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:11,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 08:01:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 08:01:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:01:11,489 INFO L87 Difference]: Start difference. First operand 1521 states and 2342 transitions. Second operand has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 08:01:12,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:12,578 INFO L93 Difference]: Finished difference Result 2604 states and 3996 transitions. [2023-11-19 08:01:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 08:01:12,579 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) Word has length 302 [2023-11-19 08:01:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:12,591 INFO L225 Difference]: With dead ends: 2604 [2023-11-19 08:01:12,592 INFO L226 Difference]: Without dead ends: 1690 [2023-11-19 08:01:12,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 589 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-11-19 08:01:12,595 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 661 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:12,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 1187 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 08:01:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2023-11-19 08:01:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 962. [2023-11-19 08:01:12,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 811 states have (on average 1.4845869297163996) internal successors, (1204), 811 states have internal predecessors, (1204), 129 states have call successors, (129), 21 states have call predecessors, (129), 21 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-19 08:01:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1462 transitions. [2023-11-19 08:01:12,724 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1462 transitions. Word has length 302 [2023-11-19 08:01:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:12,725 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1462 transitions. [2023-11-19 08:01:12,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-19 08:01:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1462 transitions. [2023-11-19 08:01:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:01:12,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:12,730 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:12,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:12,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 08:01:12,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:12,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1152830305, now seen corresponding path program 1 times [2023-11-19 08:01:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334439190] [2023-11-19 08:01:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:12,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:12,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749775600] [2023-11-19 08:01:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:12,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:12,997 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:13,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 08:01:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:13,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:01:13,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:01:13,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:13,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334439190] [2023-11-19 08:01:13,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:13,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749775600] [2023-11-19 08:01:13,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749775600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:13,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:13,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246694840] [2023-11-19 08:01:13,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:13,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:13,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:13,844 INFO L87 Difference]: Start difference. First operand 962 states and 1462 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:01:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:13,999 INFO L93 Difference]: Finished difference Result 1730 states and 2636 transitions. [2023-11-19 08:01:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 302 [2023-11-19 08:01:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:14,018 INFO L225 Difference]: With dead ends: 1730 [2023-11-19 08:01:14,027 INFO L226 Difference]: Without dead ends: 1346 [2023-11-19 08:01:14,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:14,030 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 173 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:14,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 812 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:01:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2023-11-19 08:01:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1344. [2023-11-19 08:01:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1143 states have (on average 1.4855643044619422) internal successors, (1698), 1143 states have internal predecessors, (1698), 172 states have call successors, (172), 28 states have call predecessors, (172), 28 states have return successors, (172), 172 states have call predecessors, (172), 172 states have call successors, (172) [2023-11-19 08:01:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 2042 transitions. [2023-11-19 08:01:14,184 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 2042 transitions. Word has length 302 [2023-11-19 08:01:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:14,185 INFO L495 AbstractCegarLoop]: Abstraction has 1344 states and 2042 transitions. [2023-11-19 08:01:14,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:01:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 2042 transitions. [2023-11-19 08:01:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-19 08:01:14,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:14,189 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:14,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:14,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 08:01:14,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:14,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:14,413 INFO L85 PathProgramCache]: Analyzing trace with hash 233373089, now seen corresponding path program 1 times [2023-11-19 08:01:14,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:14,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128758407] [2023-11-19 08:01:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:14,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:14,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051905357] [2023-11-19 08:01:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:14,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:14,463 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:14,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 08:01:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:14,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:01:14,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1428 proven. 93 refuted. 0 times theorem prover too weak. 2091 trivial. 0 not checked. [2023-11-19 08:01:16,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:01:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 33 proven. 93 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2023-11-19 08:01:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128758407] [2023-11-19 08:01:16,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051905357] [2023-11-19 08:01:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051905357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:01:16,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:01:16,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-19 08:01:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372531910] [2023-11-19 08:01:16,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:01:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:01:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:01:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:01:16,625 INFO L87 Difference]: Start difference. First operand 1344 states and 2042 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (86), 3 states have call predecessors, (86), 5 states have return successors, (86), 4 states have call predecessors, (86), 4 states have call successors, (86) [2023-11-19 08:01:19,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:19,428 INFO L93 Difference]: Finished difference Result 6087 states and 8756 transitions. [2023-11-19 08:01:19,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 08:01:19,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (86), 3 states have call predecessors, (86), 5 states have return successors, (86), 4 states have call predecessors, (86), 4 states have call successors, (86) Word has length 302 [2023-11-19 08:01:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:19,446 INFO L225 Difference]: With dead ends: 6087 [2023-11-19 08:01:19,446 INFO L226 Difference]: Without dead ends: 4939 [2023-11-19 08:01:19,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=651, Unknown=0, NotChecked=0, Total=992 [2023-11-19 08:01:19,452 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1405 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:19,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1502 Valid, 1811 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-19 08:01:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2023-11-19 08:01:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 3444. [2023-11-19 08:01:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 2980 states have (on average 1.4644295302013424) internal successors, (4364), 2986 states have internal predecessors, (4364), 367 states have call successors, (367), 96 states have call predecessors, (367), 96 states have return successors, (367), 361 states have call predecessors, (367), 367 states have call successors, (367) [2023-11-19 08:01:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 5098 transitions. [2023-11-19 08:01:19,888 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 5098 transitions. Word has length 302 [2023-11-19 08:01:19,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:19,889 INFO L495 AbstractCegarLoop]: Abstraction has 3444 states and 5098 transitions. [2023-11-19 08:01:19,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (86), 3 states have call predecessors, (86), 5 states have return successors, (86), 4 states have call predecessors, (86), 4 states have call successors, (86) [2023-11-19 08:01:19,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 5098 transitions. [2023-11-19 08:01:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-19 08:01:19,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:19,894 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:19,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:20,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 08:01:20,108 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:20,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:20,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2132125020, now seen corresponding path program 1 times [2023-11-19 08:01:20,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:20,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729269603] [2023-11-19 08:01:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:20,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:20,169 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:20,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317263065] [2023-11-19 08:01:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:20,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:20,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:20,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:20,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 08:01:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:20,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 08:01:20,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:01:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2023-11-19 08:01:21,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:01:21,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:21,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729269603] [2023-11-19 08:01:21,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:01:21,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317263065] [2023-11-19 08:01:21,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317263065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:21,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:21,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:21,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097928882] [2023-11-19 08:01:21,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:21,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:21,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:21,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:21,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:21,442 INFO L87 Difference]: Start difference. First operand 3444 states and 5098 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:01:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:01:22,303 INFO L93 Difference]: Finished difference Result 12304 states and 18386 transitions. [2023-11-19 08:01:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) Word has length 303 [2023-11-19 08:01:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:01:22,331 INFO L225 Difference]: With dead ends: 12304 [2023-11-19 08:01:22,331 INFO L226 Difference]: Without dead ends: 8986 [2023-11-19 08:01:22,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:22,341 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 456 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 08:01:22,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 761 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 08:01:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8986 states. [2023-11-19 08:01:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8986 to 8652. [2023-11-19 08:01:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8652 states, 7777 states have (on average 1.4886202906004886) internal successors, (11577), 7789 states have internal predecessors, (11577), 691 states have call successors, (691), 183 states have call predecessors, (691), 183 states have return successors, (691), 679 states have call predecessors, (691), 691 states have call successors, (691) [2023-11-19 08:01:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8652 states to 8652 states and 12959 transitions. [2023-11-19 08:01:23,300 INFO L78 Accepts]: Start accepts. Automaton has 8652 states and 12959 transitions. Word has length 303 [2023-11-19 08:01:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:01:23,301 INFO L495 AbstractCegarLoop]: Abstraction has 8652 states and 12959 transitions. [2023-11-19 08:01:23,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (43), 1 states have call predecessors, (43), 1 states have return successors, (43), 1 states have call predecessors, (43), 1 states have call successors, (43) [2023-11-19 08:01:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8652 states and 12959 transitions. [2023-11-19 08:01:23,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-11-19 08:01:23,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:01:23,315 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:23,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 08:01:23,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 08:01:23,537 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:23,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:23,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2116606302, now seen corresponding path program 1 times [2023-11-19 08:01:23,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:23,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963032915] [2023-11-19 08:01:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:23,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:23,625 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:01:23,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954982002] [2023-11-19 08:01:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:23,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:01:23,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:23,637 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:01:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_942d760a-5c8f-48cf-81b0-d5ff6de703d5/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 08:01:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:24,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:01:24,114 INFO L285 TraceCheckSpWp]: Computing forward predicates...