./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/half_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 01:52:08,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 01:52:08,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 01:52:09,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 01:52:09,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 01:52:09,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 01:52:09,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 01:52:09,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 01:52:09,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 01:52:09,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 01:52:09,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 01:52:09,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 01:52:09,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 01:52:09,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 01:52:09,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 01:52:09,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 01:52:09,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 01:52:09,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 01:52:09,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 01:52:09,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 01:52:09,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 01:52:09,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 01:52:09,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 01:52:09,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 01:52:09,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 01:52:09,060 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 01:52:09,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 01:52:09,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 01:52:09,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 01:52:09,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 01:52:09,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 01:52:09,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 01:52:09,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 01:52:09,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 01:52:09,071 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 01:52:09,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 01:52:09,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 01:52:09,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 01:52:09,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 01:52:09,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 01:52:09,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 01:52:09,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 01:52:09,114 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 01:52:09,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 01:52:09,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 01:52:09,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 01:52:09,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 01:52:09,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 01:52:09,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 01:52:09,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 01:52:09,118 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 01:52:09,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 01:52:09,120 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 01:52:09,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 01:52:09,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 01:52:09,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 01:52:09,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 01:52:09,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 01:52:09,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 01:52:09,122 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 01:52:09,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 01:52:09,123 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 01:52:09,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 01:52:09,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 01:52:09,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 01:52:09,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 01:52:09,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:52:09,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 01:52:09,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 01:52:09,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 01:52:09,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 01:52:09,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 01:52:09,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 01:52:09,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 01:52:09,127 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 01:52:09,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 01:52:09,127 INFO L138 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_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2022-11-23 01:52:09,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 01:52:09,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 01:52:09,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 01:52:09,463 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 01:52:09,464 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 01:52:09,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/loop-invgen/half_2.i [2022-11-23 01:52:12,495 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 01:52:12,723 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 01:52:12,724 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/sv-benchmarks/c/loop-invgen/half_2.i [2022-11-23 01:52:12,730 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/data/82efeb50f/f9d9ad359d544d89a10fb72648d91bed/FLAG626b185d0 [2022-11-23 01:52:12,745 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/data/82efeb50f/f9d9ad359d544d89a10fb72648d91bed [2022-11-23 01:52:12,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 01:52:12,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 01:52:12,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 01:52:12,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 01:52:12,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 01:52:12,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:12,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d148ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12, skipping insertion in model container [2022-11-23 01:52:12,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:12,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 01:52:12,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 01:52:12,934 WARN L237 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_df7cce77-4dbc-4c98-9638-05376aaef9cc/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2022-11-23 01:52:12,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:52:12,962 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 01:52:12,973 WARN L237 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_df7cce77-4dbc-4c98-9638-05376aaef9cc/sv-benchmarks/c/loop-invgen/half_2.i[893,906] [2022-11-23 01:52:12,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 01:52:12,990 INFO L208 MainTranslator]: Completed translation [2022-11-23 01:52:12,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12 WrapperNode [2022-11-23 01:52:12,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 01:52:12,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 01:52:12,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 01:52:12,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 01:52:12,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,023 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-11-23 01:52:13,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 01:52:13,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 01:52:13,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 01:52:13,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 01:52:13,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,053 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 01:52:13,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 01:52:13,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 01:52:13,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 01:52:13,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (1/1) ... [2022-11-23 01:52:13,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 01:52:13,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:13,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 01:52:13,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 01:52:13,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 01:52:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 01:52:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 01:52:13,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 01:52:13,208 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 01:52:13,210 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 01:52:13,317 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 01:52:13,324 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 01:52:13,324 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 01:52:13,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:13 BoogieIcfgContainer [2022-11-23 01:52:13,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 01:52:13,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 01:52:13,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 01:52:13,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 01:52:13,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:52:12" (1/3) ... [2022-11-23 01:52:13,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4123cb08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:13, skipping insertion in model container [2022-11-23 01:52:13,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:12" (2/3) ... [2022-11-23 01:52:13,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4123cb08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:13, skipping insertion in model container [2022-11-23 01:52:13,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:13" (3/3) ... [2022-11-23 01:52:13,336 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2022-11-23 01:52:13,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 01:52:13,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 01:52:13,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 01:52:13,410 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=LoopsAndPotentialCycles, 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;@39cc1bcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 01:52:13,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 01:52:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 01:52:13,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:13,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:13,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2022-11-23 01:52:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:13,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899054176] [2022-11-23 01:52:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:13,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:13,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:13,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899054176] [2022-11-23 01:52:13,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899054176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:52:13,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:52:13,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 01:52:13,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537186688] [2022-11-23 01:52:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:52:13,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 01:52:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:13,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 01:52:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 01:52:13,607 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:13,621 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-11-23 01:52:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 01:52:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 01:52:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:13,645 INFO L225 Difference]: With dead ends: 24 [2022-11-23 01:52:13,645 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 01:52:13,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 01:52:13,652 INFO L413 NwaCegarLoop]: 16 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, 16 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 [2022-11-23 01:52:13,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 01:52:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 01:52:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 01:52:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-23 01:52:13,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-11-23 01:52:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:13,685 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-23 01:52:13,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-23 01:52:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 01:52:13,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:13,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:13,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 01:52:13,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:13,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:13,688 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2022-11-23 01:52:13,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:13,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059255049] [2022-11-23 01:52:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:13,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:14,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:14,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059255049] [2022-11-23 01:52:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059255049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:52:14,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 01:52:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 01:52:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235129916] [2022-11-23 01:52:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:52:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 01:52:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 01:52:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 01:52:14,092 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:14,172 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-11-23 01:52:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:52:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 01:52:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:14,174 INFO L225 Difference]: With dead ends: 18 [2022-11-23 01:52:14,174 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 01:52:14,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 01:52:14,176 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:14,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 01:52:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 01:52:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-11-23 01:52:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-23 01:52:14,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-23 01:52:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:14,190 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-23 01:52:14,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-23 01:52:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 01:52:14,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:14,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:14,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 01:52:14,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2022-11-23 01:52:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:14,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424985264] [2022-11-23 01:52:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424985264] [2022-11-23 01:52:14,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424985264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:14,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969888789] [2022-11-23 01:52:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:14,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:14,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:14,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 01:52:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:14,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 01:52:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:14,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:14,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969888789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:14,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:14,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 01:52:14,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243406529] [2022-11-23 01:52:14,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:14,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 01:52:14,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:14,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 01:52:14,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 01:52:14,984 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:15,513 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-23 01:52:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 01:52:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 01:52:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:15,514 INFO L225 Difference]: With dead ends: 41 [2022-11-23 01:52:15,515 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 01:52:15,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-11-23 01:52:15,517 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:15,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 01:52:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 01:52:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2022-11-23 01:52:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-23 01:52:15,526 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-11-23 01:52:15,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:15,527 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-23 01:52:15,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-23 01:52:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 01:52:15,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:15,528 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:15,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:15,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:15,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:15,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash -424251923, now seen corresponding path program 2 times [2022-11-23 01:52:15,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:15,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733406445] [2022-11-23 01:52:15,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:15,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:15,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733406445] [2022-11-23 01:52:15,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733406445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:15,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457493604] [2022-11-23 01:52:15,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:52:15,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:15,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:16,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 01:52:16,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:52:16,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 01:52:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:16,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:16,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457493604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:16,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:16,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 01:52:16,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961996052] [2022-11-23 01:52:16,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:16,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 01:52:16,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 01:52:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-23 01:52:16,280 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:16,672 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-11-23 01:52:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 01:52:16,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 01:52:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:16,675 INFO L225 Difference]: With dead ends: 51 [2022-11-23 01:52:16,675 INFO L226 Difference]: Without dead ends: 49 [2022-11-23 01:52:16,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-11-23 01:52:16,677 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:16,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 85 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 01:52:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-23 01:52:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 19. [2022-11-23 01:52:16,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-23 01:52:16,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2022-11-23 01:52:16,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:16,693 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-23 01:52:16,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-23 01:52:16,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 01:52:16,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:16,694 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:16,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 01:52:16,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:16,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:16,899 INFO L85 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2022-11-23 01:52:16,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028484394] [2022-11-23 01:52:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:16,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:17,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:17,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028484394] [2022-11-23 01:52:17,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028484394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:17,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915988684] [2022-11-23 01:52:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:17,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:17,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:17,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:17,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 01:52:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:17,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 01:52:17,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:17,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 01:52:17,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915988684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 01:52:17,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 01:52:17,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-23 01:52:17,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144113142] [2022-11-23 01:52:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 01:52:17,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 01:52:17,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:17,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 01:52:17,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 01:52:17,167 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:17,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:17,225 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-11-23 01:52:17,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 01:52:17,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 01:52:17,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:17,228 INFO L225 Difference]: With dead ends: 27 [2022-11-23 01:52:17,228 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 01:52:17,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-23 01:52:17,231 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:17,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 01:52:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 01:52:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 01:52:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-23 01:52:17,247 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-11-23 01:52:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:17,248 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-23 01:52:17,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-23 01:52:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 01:52:17,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:17,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:17,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:17,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:17,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 1 times [2022-11-23 01:52:17,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:17,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617572317] [2022-11-23 01:52:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:17,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:17,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617572317] [2022-11-23 01:52:17,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617572317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:17,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160483108] [2022-11-23 01:52:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:17,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:17,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 01:52:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:17,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 01:52:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:17,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:18,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160483108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:18,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:18,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-11-23 01:52:18,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290963358] [2022-11-23 01:52:18,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:18,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 01:52:18,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 01:52:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-23 01:52:18,204 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:18,943 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-11-23 01:52:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 01:52:18,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 01:52:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:18,944 INFO L225 Difference]: With dead ends: 47 [2022-11-23 01:52:18,944 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 01:52:18,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 01:52:18,947 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 86 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:18,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 42 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 01:52:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 01:52:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2022-11-23 01:52:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-23 01:52:18,966 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-11-23 01:52:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:18,967 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-23 01:52:18,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-23 01:52:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 01:52:18,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:18,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:18,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 01:52:19,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:19,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 2 times [2022-11-23 01:52:19,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:19,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188537996] [2022-11-23 01:52:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:19,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:19,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188537996] [2022-11-23 01:52:19,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188537996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441824067] [2022-11-23 01:52:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:52:19,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:19,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:19,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 01:52:19,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:52:19,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:19,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 01:52:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:19,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:20,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441824067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:20,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:20,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-11-23 01:52:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031175223] [2022-11-23 01:52:20,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 01:52:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 01:52:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-23 01:52:20,173 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:21,002 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-23 01:52:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 01:52:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 01:52:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:21,004 INFO L225 Difference]: With dead ends: 49 [2022-11-23 01:52:21,004 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 01:52:21,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 01:52:21,005 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:21,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 01:52:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 01:52:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-11-23 01:52:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-23 01:52:21,018 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-11-23 01:52:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:21,018 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-23 01:52:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-23 01:52:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 01:52:21,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:21,019 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:21,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:21,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 01:52:21,224 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:21,225 INFO L85 PathProgramCache]: Analyzing trace with hash 38169965, now seen corresponding path program 3 times [2022-11-23 01:52:21,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:21,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516719699] [2022-11-23 01:52:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:21,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:21,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516719699] [2022-11-23 01:52:21,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516719699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:21,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14979389] [2022-11-23 01:52:21,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 01:52:21,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:21,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:21,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:21,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 01:52:21,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 01:52:21,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:21,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 01:52:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:21,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:21,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14979389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:21,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:21,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-11-23 01:52:21,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075382450] [2022-11-23 01:52:21,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:21,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 01:52:21,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:21,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 01:52:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-11-23 01:52:21,937 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:22,672 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-11-23 01:52:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 01:52:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 01:52:22,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:22,674 INFO L225 Difference]: With dead ends: 82 [2022-11-23 01:52:22,674 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 01:52:22,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=750, Invalid=2220, Unknown=0, NotChecked=0, Total=2970 [2022-11-23 01:52:22,676 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 135 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:22,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 105 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 01:52:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 01:52:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2022-11-23 01:52:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-11-23 01:52:22,717 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2022-11-23 01:52:22,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:22,717 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-11-23 01:52:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-11-23 01:52:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 01:52:22,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:22,718 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:22,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:22,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:22,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 4 times [2022-11-23 01:52:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:22,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756718625] [2022-11-23 01:52:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:23,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:23,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756718625] [2022-11-23 01:52:23,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756718625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:23,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74168664] [2022-11-23 01:52:23,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 01:52:23,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:23,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:23,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 01:52:23,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 01:52:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:23,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 01:52:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:23,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:24,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74168664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:24,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:24,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-11-23 01:52:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225723027] [2022-11-23 01:52:24,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 01:52:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 01:52:24,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-11-23 01:52:24,176 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:24,741 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-23 01:52:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 01:52:24,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 01:52:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:24,743 INFO L225 Difference]: With dead ends: 56 [2022-11-23 01:52:24,743 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 01:52:24,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 01:52:24,746 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:24,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 01:52:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 01:52:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-11-23 01:52:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-11-23 01:52:24,791 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2022-11-23 01:52:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:24,791 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-11-23 01:52:24,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-11-23 01:52:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 01:52:24,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:24,792 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:24,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:24,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:24,998 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 5 times [2022-11-23 01:52:25,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:25,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977921799] [2022-11-23 01:52:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:25,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:25,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977921799] [2022-11-23 01:52:25,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977921799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162263784] [2022-11-23 01:52:25,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 01:52:25,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:25,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:25,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:25,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 01:52:25,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-23 01:52:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:25,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 01:52:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:25,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:26,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162263784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:26,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:26,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 36 [2022-11-23 01:52:26,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793871429] [2022-11-23 01:52:26,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 01:52:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 01:52:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 01:52:26,786 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:28,511 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-11-23 01:52:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 01:52:28,511 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 01:52:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:28,513 INFO L225 Difference]: With dead ends: 93 [2022-11-23 01:52:28,513 INFO L226 Difference]: Without dead ends: 72 [2022-11-23 01:52:28,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=604, Invalid=3056, Unknown=0, NotChecked=0, Total=3660 [2022-11-23 01:52:28,516 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 131 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:28,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 87 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 01:52:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-23 01:52:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2022-11-23 01:52:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-23 01:52:28,541 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2022-11-23 01:52:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:28,541 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-23 01:52:28,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-23 01:52:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 01:52:28,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:28,542 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:28,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:28,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 01:52:28,748 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:28,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 6 times [2022-11-23 01:52:28,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:28,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594647827] [2022-11-23 01:52:28,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594647827] [2022-11-23 01:52:29,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594647827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15695315] [2022-11-23 01:52:29,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 01:52:29,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:29,409 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:29,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 01:52:29,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-23 01:52:29,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 01:52:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:30,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:31,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15695315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:31,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:31,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-11-23 01:52:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303364615] [2022-11-23 01:52:31,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 01:52:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 01:52:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 01:52:31,103 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:32,464 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-11-23 01:52:32,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 01:52:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-23 01:52:32,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:32,466 INFO L225 Difference]: With dead ends: 60 [2022-11-23 01:52:32,466 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 01:52:32,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=562, Invalid=3598, Unknown=0, NotChecked=0, Total=4160 [2022-11-23 01:52:32,468 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 71 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:32,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 93 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 01:52:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 01:52:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-11-23 01:52:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-23 01:52:32,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-11-23 01:52:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:32,489 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-23 01:52:32,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 48 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-23 01:52:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 01:52:32,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:32,490 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:32,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:32,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 7 times [2022-11-23 01:52:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:32,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596000627] [2022-11-23 01:52:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:32,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596000627] [2022-11-23 01:52:33,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596000627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:33,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714508343] [2022-11-23 01:52:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 01:52:33,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:33,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:33,460 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:33,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 01:52:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 01:52:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:33,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:34,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714508343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:34,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:34,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-11-23 01:52:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059437156] [2022-11-23 01:52:34,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:34,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-23 01:52:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-23 01:52:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 01:52:34,957 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:37,579 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-11-23 01:52:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 01:52:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-23 01:52:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:37,580 INFO L225 Difference]: With dead ends: 93 [2022-11-23 01:52:37,580 INFO L226 Difference]: Without dead ends: 66 [2022-11-23 01:52:37,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2022-11-23 01:52:37,582 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 160 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:37,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 120 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 01:52:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-23 01:52:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-11-23 01:52:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-23 01:52:37,611 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 33 [2022-11-23 01:52:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:37,612 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-23 01:52:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-23 01:52:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 01:52:37,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:37,613 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:37,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:37,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 01:52:37,818 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:37,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 8 times [2022-11-23 01:52:37,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:37,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092323640] [2022-11-23 01:52:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:37,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:38,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092323640] [2022-11-23 01:52:38,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092323640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073579215] [2022-11-23 01:52:38,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:52:38,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:38,644 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:38,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 01:52:38,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:52:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 01:52:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:39,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:40,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073579215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:40,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:40,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-11-23 01:52:40,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640900115] [2022-11-23 01:52:40,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:40,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 01:52:40,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 01:52:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 01:52:40,312 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:43,490 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-11-23 01:52:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-23 01:52:43,490 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 01:52:43,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:43,491 INFO L225 Difference]: With dead ends: 124 [2022-11-23 01:52:43,491 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 01:52:43,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1097, Invalid=6213, Unknown=0, NotChecked=0, Total=7310 [2022-11-23 01:52:43,495 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 187 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:43,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 141 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 01:52:43,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 01:52:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-11-23 01:52:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-23 01:52:43,561 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 37 [2022-11-23 01:52:43,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:43,561 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-23 01:52:43,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-23 01:52:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 01:52:43,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:43,563 INFO L195 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:43,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:43,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 01:52:43,765 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash -826667923, now seen corresponding path program 9 times [2022-11-23 01:52:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:43,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192951688] [2022-11-23 01:52:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:44,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192951688] [2022-11-23 01:52:44,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192951688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161424367] [2022-11-23 01:52:44,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 01:52:44,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:44,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:44,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:44,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 01:52:44,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-23 01:52:44,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:44,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 01:52:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:44,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:45,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161424367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:45,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:45,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-11-23 01:52:45,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501207867] [2022-11-23 01:52:45,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-23 01:52:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-23 01:52:45,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2022-11-23 01:52:45,581 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:47,577 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2022-11-23 01:52:47,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-23 01:52:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-23 01:52:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:47,579 INFO L225 Difference]: With dead ends: 266 [2022-11-23 01:52:47,579 INFO L226 Difference]: Without dead ends: 264 [2022-11-23 01:52:47,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3111, Invalid=9771, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 01:52:47,583 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 370 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:47,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 210 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 01:52:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-23 01:52:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 72. [2022-11-23 01:52:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-11-23 01:52:47,652 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2022-11-23 01:52:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:47,652 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-11-23 01:52:47,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-11-23 01:52:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 01:52:47,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:47,654 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:47,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:47,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 01:52:47,859 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 10 times [2022-11-23 01:52:47,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:47,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300932793] [2022-11-23 01:52:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:48,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300932793] [2022-11-23 01:52:48,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300932793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772070572] [2022-11-23 01:52:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 01:52:48,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:48,784 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:48,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 01:52:48,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 01:52:48,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:48,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 01:52:48,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:50,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772070572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:50,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:50,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 24] total 56 [2022-11-23 01:52:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367472542] [2022-11-23 01:52:50,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-23 01:52:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-23 01:52:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 01:52:50,920 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:52:54,826 INFO L93 Difference]: Finished difference Result 277 states and 289 transitions. [2022-11-23 01:52:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-23 01:52:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-23 01:52:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:52:54,828 INFO L225 Difference]: With dead ends: 277 [2022-11-23 01:52:54,828 INFO L226 Difference]: Without dead ends: 244 [2022-11-23 01:52:54,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1394, Invalid=7918, Unknown=0, NotChecked=0, Total=9312 [2022-11-23 01:52:54,830 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 250 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 01:52:54,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 151 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 01:52:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-23 01:52:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 71. [2022-11-23 01:52:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-23 01:52:54,908 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 41 [2022-11-23 01:52:54,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:52:54,908 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-23 01:52:54,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 56 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:52:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-23 01:52:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 01:52:54,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:52:54,909 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:52:54,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 01:52:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 01:52:55,119 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:52:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:52:55,119 INFO L85 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 11 times [2022-11-23 01:52:55,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:52:55,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755823668] [2022-11-23 01:52:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:52:55,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:52:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:52:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:56,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:52:56,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755823668] [2022-11-23 01:52:56,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755823668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:52:56,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823249987] [2022-11-23 01:52:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 01:52:56,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:52:56,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:52:56,150 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:52:56,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 01:52:56,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-23 01:52:56,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:52:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 01:52:56,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:52:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:56,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:52:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:52:58,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823249987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:52:58,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:52:58,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 26] total 61 [2022-11-23 01:52:58,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823547851] [2022-11-23 01:52:58,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:52:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-23 01:52:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:52:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-23 01:52:58,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3097, Unknown=0, NotChecked=0, Total=3660 [2022-11-23 01:52:58,583 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:53:03,296 INFO L93 Difference]: Finished difference Result 268 states and 281 transitions. [2022-11-23 01:53:03,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-23 01:53:03,297 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-23 01:53:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:53:03,298 INFO L225 Difference]: With dead ends: 268 [2022-11-23 01:53:03,298 INFO L226 Difference]: Without dead ends: 232 [2022-11-23 01:53:03,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1644, Invalid=9486, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 01:53:03,300 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 262 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 01:53:03,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 192 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 01:53:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-23 01:53:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 70. [2022-11-23 01:53:03,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-11-23 01:53:03,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 45 [2022-11-23 01:53:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:53:03,360 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-11-23 01:53:03,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9344262295081966) internal successors, (118), 61 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-11-23 01:53:03,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 01:53:03,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:53:03,361 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:53:03,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 01:53:03,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 01:53:03,564 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:53:03,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:53:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 12 times [2022-11-23 01:53:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:53:03,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547050823] [2022-11-23 01:53:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:53:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:53:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:53:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:04,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:53:04,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547050823] [2022-11-23 01:53:04,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547050823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:53:04,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941186497] [2022-11-23 01:53:04,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 01:53:04,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:53:04,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:53:04,730 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:53:04,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 01:53:04,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-23 01:53:04,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:53:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 01:53:04,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:53:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:06,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:53:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:08,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941186497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:53:08,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:53:08,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 78 [2022-11-23 01:53:08,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204281232] [2022-11-23 01:53:08,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:53:08,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-23 01:53:08,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:53:08,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-23 01:53:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=5264, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 01:53:08,151 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:53:12,038 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-11-23 01:53:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 01:53:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-23 01:53:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:53:12,039 INFO L225 Difference]: With dead ends: 117 [2022-11-23 01:53:12,039 INFO L226 Difference]: Without dead ends: 78 [2022-11-23 01:53:12,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1364, Invalid=9766, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 01:53:12,041 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 134 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 01:53:12,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 100 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 01:53:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-23 01:53:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2022-11-23 01:53:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-11-23 01:53:12,105 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 49 [2022-11-23 01:53:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:53:12,106 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-11-23 01:53:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.794871794871795) internal successors, (140), 78 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-11-23 01:53:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 01:53:12,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:53:12,107 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:53:12,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 01:53:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 01:53:12,311 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:53:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:53:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 13 times [2022-11-23 01:53:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:53:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327887524] [2022-11-23 01:53:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:53:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:53:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:53:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:13,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:53:13,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327887524] [2022-11-23 01:53:13,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327887524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:53:13,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752309672] [2022-11-23 01:53:13,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 01:53:13,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:53:13,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:53:13,654 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:53:13,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 01:53:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:53:13,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-23 01:53:13,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:53:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:14,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:53:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:16,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752309672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:53:16,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:53:16,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2022-11-23 01:53:16,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047534414] [2022-11-23 01:53:16,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:53:16,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-23 01:53:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:53:16,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-23 01:53:16,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2022-11-23 01:53:16,407 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:53:22,435 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2022-11-23 01:53:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-23 01:53:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-23 01:53:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:53:22,436 INFO L225 Difference]: With dead ends: 232 [2022-11-23 01:53:22,436 INFO L226 Difference]: Without dead ends: 190 [2022-11-23 01:53:22,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3801 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=2115, Invalid=12647, Unknown=0, NotChecked=0, Total=14762 [2022-11-23 01:53:22,439 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 305 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 01:53:22,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 229 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1589 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 01:53:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-23 01:53:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 68. [2022-11-23 01:53:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-11-23 01:53:22,514 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 53 [2022-11-23 01:53:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:53:22,514 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-11-23 01:53:22,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-11-23 01:53:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 01:53:22,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:53:22,515 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:53:22,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 01:53:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 01:53:22,715 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:53:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:53:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 14 times [2022-11-23 01:53:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:53:22,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702628656] [2022-11-23 01:53:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:53:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:53:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:53:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:53:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702628656] [2022-11-23 01:53:24,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702628656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:53:24,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619443869] [2022-11-23 01:53:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:53:24,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:53:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:53:24,174 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:53:24,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 01:53:24,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:53:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:53:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-23 01:53:24,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:53:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:25,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:53:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:28,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619443869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:53:28,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:53:28,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 32] total 89 [2022-11-23 01:53:28,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244525824] [2022-11-23 01:53:28,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:53:28,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-23 01:53:28,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:53:28,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-23 01:53:28,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1070, Invalid=6762, Unknown=0, NotChecked=0, Total=7832 [2022-11-23 01:53:28,565 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:37,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:53:37,549 INFO L93 Difference]: Finished difference Result 205 states and 221 transitions. [2022-11-23 01:53:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-23 01:53:37,550 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-23 01:53:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:53:37,551 INFO L225 Difference]: With dead ends: 205 [2022-11-23 01:53:37,551 INFO L226 Difference]: Without dead ends: 160 [2022-11-23 01:53:37,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6748 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=3012, Invalid=19040, Unknown=0, NotChecked=0, Total=22052 [2022-11-23 01:53:37,553 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 372 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 01:53:37,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 294 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 01:53:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-23 01:53:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 67. [2022-11-23 01:53:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-11-23 01:53:37,617 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2022-11-23 01:53:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:53:37,617 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-11-23 01:53:37,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 89 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-11-23 01:53:37,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 01:53:37,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:53:37,618 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:53:37,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-23 01:53:37,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:53:37,818 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:53:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:53:37,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 15 times [2022-11-23 01:53:37,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:53:37,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756144732] [2022-11-23 01:53:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:53:37,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:53:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:53:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:39,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:53:39,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756144732] [2022-11-23 01:53:39,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756144732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:53:39,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215764324] [2022-11-23 01:53:39,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 01:53:39,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:53:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:53:39,399 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:53:39,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 01:53:39,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-23 01:53:39,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:53:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 01:53:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:53:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:41,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:53:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:44,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215764324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:53:44,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:53:44,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 100 [2022-11-23 01:53:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757705151] [2022-11-23 01:53:44,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:53:44,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-23 01:53:44,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:53:44,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-23 01:53:44,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=8718, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 01:53:44,567 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:53:50,362 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-11-23 01:53:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 01:53:50,363 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-23 01:53:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:53:50,363 INFO L225 Difference]: With dead ends: 116 [2022-11-23 01:53:50,363 INFO L226 Difference]: Without dead ends: 68 [2022-11-23 01:53:50,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4730 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2173, Invalid=15917, Unknown=0, NotChecked=0, Total=18090 [2022-11-23 01:53:50,365 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 208 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 01:53:50,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 141 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 01:53:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-23 01:53:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-23 01:53:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-11-23 01:53:50,430 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2022-11-23 01:53:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:53:50,431 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-11-23 01:53:50,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:53:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-11-23 01:53:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 01:53:50,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:53:50,431 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:53:50,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 01:53:50,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:53:50,632 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:53:50,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:53:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 16 times [2022-11-23 01:53:50,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:53:50,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639024929] [2022-11-23 01:53:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:53:50,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:53:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:53:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:52,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:53:52,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639024929] [2022-11-23 01:53:52,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639024929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:53:52,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056343371] [2022-11-23 01:53:52,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 01:53:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:53:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:53:52,372 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:53:52,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 01:53:52,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 01:53:52,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:53:52,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-23 01:53:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:53:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:53,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:53:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:53:56,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056343371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:53:56,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:53:56,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 36] total 86 [2022-11-23 01:53:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885094082] [2022-11-23 01:53:56,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:53:56,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-23 01:53:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:53:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-23 01:53:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1078, Invalid=6232, Unknown=0, NotChecked=0, Total=7310 [2022-11-23 01:53:56,488 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:54:05,428 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2022-11-23 01:54:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 01:54:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-23 01:54:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:54:05,429 INFO L225 Difference]: With dead ends: 181 [2022-11-23 01:54:05,430 INFO L226 Difference]: Without dead ends: 130 [2022-11-23 01:54:05,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5960 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3209, Invalid=19441, Unknown=0, NotChecked=0, Total=22650 [2022-11-23 01:54:05,431 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 440 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 01:54:05,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 340 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 01:54:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-23 01:54:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2022-11-23 01:54:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-11-23 01:54:05,544 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 65 [2022-11-23 01:54:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:54:05,545 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-11-23 01:54:05,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-11-23 01:54:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 01:54:05,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:54:05,546 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:05,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 01:54:05,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 01:54:05,747 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:54:05,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:05,748 INFO L85 PathProgramCache]: Analyzing trace with hash -181376823, now seen corresponding path program 17 times [2022-11-23 01:54:05,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:05,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255829417] [2022-11-23 01:54:05,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:05,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:07,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:07,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255829417] [2022-11-23 01:54:07,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255829417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:07,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582895482] [2022-11-23 01:54:07,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 01:54:07,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:07,651 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:07,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 01:54:07,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-23 01:54:07,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:54:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-23 01:54:07,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:09,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:12,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582895482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:12,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:12,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 91 [2022-11-23 01:54:12,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456266859] [2022-11-23 01:54:12,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:12,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-23 01:54:12,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:12,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-23 01:54:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1212, Invalid=6978, Unknown=0, NotChecked=0, Total=8190 [2022-11-23 01:54:12,192 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:54:22,671 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2022-11-23 01:54:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-23 01:54:22,671 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-23 01:54:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:54:22,673 INFO L225 Difference]: With dead ends: 236 [2022-11-23 01:54:22,673 INFO L226 Difference]: Without dead ends: 182 [2022-11-23 01:54:22,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6846 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=3634, Invalid=22126, Unknown=0, NotChecked=0, Total=25760 [2022-11-23 01:54:22,675 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 453 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 01:54:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 450 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 2943 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 01:54:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-23 01:54:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2022-11-23 01:54:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2022-11-23 01:54:22,870 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 69 [2022-11-23 01:54:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:54:22,871 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2022-11-23 01:54:22,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.021978021978022) internal successors, (184), 91 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2022-11-23 01:54:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 01:54:22,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:54:22,872 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:22,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 01:54:23,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 01:54:23,077 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:54:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1267468051, now seen corresponding path program 18 times [2022-11-23 01:54:23,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:23,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146459857] [2022-11-23 01:54:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:23,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:25,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:25,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146459857] [2022-11-23 01:54:25,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146459857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:25,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774239559] [2022-11-23 01:54:25,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 01:54:25,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:25,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:25,184 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:25,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 01:54:25,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-23 01:54:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:54:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-23 01:54:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:27,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:31,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774239559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:31,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:31,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42, 42] total 118 [2022-11-23 01:54:31,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050883759] [2022-11-23 01:54:31,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-23 01:54:31,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:31,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-23 01:54:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1626, Invalid=12180, Unknown=0, NotChecked=0, Total=13806 [2022-11-23 01:54:31,979 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:54:41,176 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2022-11-23 01:54:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-23 01:54:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-23 01:54:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:54:41,179 INFO L225 Difference]: With dead ends: 197 [2022-11-23 01:54:41,179 INFO L226 Difference]: Without dead ends: 140 [2022-11-23 01:54:41,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6730 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=2952, Invalid=22170, Unknown=0, NotChecked=0, Total=25122 [2022-11-23 01:54:41,181 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 243 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 01:54:41,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 137 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 01:54:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-23 01:54:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-11-23 01:54:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 135 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2022-11-23 01:54:41,379 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 73 [2022-11-23 01:54:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:54:41,380 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2022-11-23 01:54:41,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.7966101694915255) internal successors, (212), 118 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2022-11-23 01:54:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 01:54:41,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:54:41,381 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:41,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 01:54:41,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 01:54:41,587 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:54:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash -473444811, now seen corresponding path program 19 times [2022-11-23 01:54:41,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546174173] [2022-11-23 01:54:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:42,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:42,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546174173] [2022-11-23 01:54:42,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546174173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:42,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721265541] [2022-11-23 01:54:42,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 01:54:42,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:42,606 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:42,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 01:54:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:42,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-23 01:54:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:43,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721265541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:44,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:44,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2022-11-23 01:54:44,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401742479] [2022-11-23 01:54:44,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:44,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-23 01:54:44,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:44,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-23 01:54:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2022-11-23 01:54:44,673 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:46,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:54:46,407 INFO L93 Difference]: Finished difference Result 194 states and 213 transitions. [2022-11-23 01:54:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-23 01:54:46,408 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-11-23 01:54:46,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:54:46,412 INFO L225 Difference]: With dead ends: 194 [2022-11-23 01:54:46,412 INFO L226 Difference]: Without dead ends: 192 [2022-11-23 01:54:46,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 94 SyntacticMatches, 17 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3941 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2199, Invalid=10011, Unknown=0, NotChecked=0, Total=12210 [2022-11-23 01:54:46,414 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 356 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 01:54:46,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 103 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 01:54:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-23 01:54:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 78. [2022-11-23 01:54:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-23 01:54:46,556 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-11-23 01:54:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:54:46,557 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-23 01:54:46,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:54:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-23 01:54:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 01:54:46,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:54:46,558 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:54:46,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 01:54:46,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 01:54:46,758 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:54:46,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:54:46,758 INFO L85 PathProgramCache]: Analyzing trace with hash 283060809, now seen corresponding path program 20 times [2022-11-23 01:54:46,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:54:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479558362] [2022-11-23 01:54:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:54:46,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:54:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:54:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:54:49,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479558362] [2022-11-23 01:54:49,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479558362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:54:49,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172490140] [2022-11-23 01:54:49,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:54:49,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:54:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:54:49,079 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:54:49,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 01:54:49,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:54:49,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:54:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-23 01:54:49,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:54:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:51,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:54:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:54:56,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172490140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:54:56,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:54:56,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 42] total 119 [2022-11-23 01:54:56,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561789516] [2022-11-23 01:54:56,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:54:56,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-11-23 01:54:56,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:54:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-11-23 01:54:56,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1870, Invalid=12172, Unknown=0, NotChecked=0, Total=14042 [2022-11-23 01:54:56,414 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:55:12,447 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-11-23 01:55:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-11-23 01:55:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-23 01:55:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:55:12,449 INFO L225 Difference]: With dead ends: 214 [2022-11-23 01:55:12,449 INFO L226 Difference]: Without dead ends: 154 [2022-11-23 01:55:12,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12268 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=5252, Invalid=34150, Unknown=0, NotChecked=0, Total=39402 [2022-11-23 01:55:12,452 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 536 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 01:55:12,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 500 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 01:55:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-23 01:55:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2022-11-23 01:55:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-11-23 01:55:12,627 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 77 [2022-11-23 01:55:12,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:55:12,627 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-11-23 01:55:12,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.8823529411764706) internal successors, (224), 119 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-11-23 01:55:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 01:55:12,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:55:12,628 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:55:12,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 01:55:12,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:55:12,829 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:55:12,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:55:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1899663213, now seen corresponding path program 21 times [2022-11-23 01:55:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:55:12,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924612125] [2022-11-23 01:55:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:55:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:55:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:55:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:15,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:55:15,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924612125] [2022-11-23 01:55:15,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924612125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:55:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59806319] [2022-11-23 01:55:15,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 01:55:15,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:55:15,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:55:15,300 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:55:15,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 01:55:15,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-23 01:55:15,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:55:15,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-23 01:55:15,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:55:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:18,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:55:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:23,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59806319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:55:23,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:55:23,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 46, 46] total 130 [2022-11-23 01:55:23,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169767588] [2022-11-23 01:55:23,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:55:23,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-23 01:55:23,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:55:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-23 01:55:23,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1957, Invalid=14813, Unknown=0, NotChecked=0, Total=16770 [2022-11-23 01:55:23,526 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:55:34,258 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-11-23 01:55:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-23 01:55:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-23 01:55:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:55:34,259 INFO L225 Difference]: With dead ends: 168 [2022-11-23 01:55:34,259 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 01:55:34,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7998 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=3558, Invalid=26892, Unknown=0, NotChecked=0, Total=30450 [2022-11-23 01:55:34,262 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 289 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2062 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 2062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 01:55:34,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 121 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 2062 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 01:55:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 01:55:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-23 01:55:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2022-11-23 01:55:34,463 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 81 [2022-11-23 01:55:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:55:34,464 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2022-11-23 01:55:34,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.8153846153846154) internal successors, (236), 130 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2022-11-23 01:55:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 01:55:34,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:55:34,465 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:55:34,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 01:55:34,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 01:55:34,671 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:55:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:55:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1093180597, now seen corresponding path program 22 times [2022-11-23 01:55:34,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:55:34,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149504562] [2022-11-23 01:55:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:55:34,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:55:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:55:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 171 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:35,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:55:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149504562] [2022-11-23 01:55:35,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149504562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:55:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087078550] [2022-11-23 01:55:35,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 01:55:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:55:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:55:35,902 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:55:35,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 01:55:35,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 01:55:35,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:55:35,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-23 01:55:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:55:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:36,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:55:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087078550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:55:38,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:55:38,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2022-11-23 01:55:38,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652348815] [2022-11-23 01:55:38,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:55:38,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-23 01:55:38,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:55:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-23 01:55:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=5689, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 01:55:38,155 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:55:40,249 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2022-11-23 01:55:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 01:55:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-11-23 01:55:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:55:40,250 INFO L225 Difference]: With dead ends: 165 [2022-11-23 01:55:40,250 INFO L226 Difference]: Without dead ends: 163 [2022-11-23 01:55:40,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 104 SyntacticMatches, 19 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2683, Invalid=12323, Unknown=0, NotChecked=0, Total=15006 [2022-11-23 01:55:40,251 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 242 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 01:55:40,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 135 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 01:55:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-23 01:55:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2022-11-23 01:55:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:40,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-11-23 01:55:40,418 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2022-11-23 01:55:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:55:40,419 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-11-23 01:55:40,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:55:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-11-23 01:55:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 01:55:40,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:55:40,420 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:55:40,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 01:55:40,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 01:55:40,626 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:55:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:55:40,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1789015095, now seen corresponding path program 23 times [2022-11-23 01:55:40,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:55:40,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128767113] [2022-11-23 01:55:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:55:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:55:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:55:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:43,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:55:43,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128767113] [2022-11-23 01:55:43,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128767113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:55:43,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515925411] [2022-11-23 01:55:43,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 01:55:43,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:55:43,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:55:43,170 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:55:43,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 01:55:43,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-23 01:55:43,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:55:43,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-23 01:55:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:55:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:45,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:55:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:55:49,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515925411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:55:49,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:55:49,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 46] total 111 [2022-11-23 01:55:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107052874] [2022-11-23 01:55:49,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:55:49,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-23 01:55:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:55:49,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-23 01:55:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1784, Invalid=10426, Unknown=0, NotChecked=0, Total=12210 [2022-11-23 01:55:49,819 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:56:08,685 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2022-11-23 01:56:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-23 01:56:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-11-23 01:56:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:56:08,687 INFO L225 Difference]: With dead ends: 236 [2022-11-23 01:56:08,687 INFO L226 Difference]: Without dead ends: 170 [2022-11-23 01:56:08,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10430 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=5397, Invalid=33609, Unknown=0, NotChecked=0, Total=39006 [2022-11-23 01:56:08,690 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 598 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 4499 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 5080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 4499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 01:56:08,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 531 Invalid, 5080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 4499 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 01:56:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-23 01:56:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2022-11-23 01:56:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2) internal successors, (132), 110 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2022-11-23 01:56:08,943 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 85 [2022-11-23 01:56:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:56:08,943 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2022-11-23 01:56:08,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2022-11-23 01:56:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 01:56:08,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:56:08,945 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:56:08,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 01:56:09,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 01:56:09,151 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:56:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:09,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1654831635, now seen corresponding path program 24 times [2022-11-23 01:56:09,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:09,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585107434] [2022-11-23 01:56:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:09,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:11,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585107434] [2022-11-23 01:56:11,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585107434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:56:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378585040] [2022-11-23 01:56:11,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 01:56:11,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:56:11,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:56:11,922 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:56:11,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 01:56:12,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-23 01:56:12,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:56:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-23 01:56:12,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:56:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:15,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:56:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:20,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378585040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:56:20,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:56:20,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 138 [2022-11-23 01:56:21,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8984825] [2022-11-23 01:56:21,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:56:21,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-23 01:56:21,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-23 01:56:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=16694, Unknown=0, NotChecked=0, Total=18906 [2022-11-23 01:56:21,002 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:34,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:56:34,933 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2022-11-23 01:56:34,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-23 01:56:34,934 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-23 01:56:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:56:34,934 INFO L225 Difference]: With dead ends: 184 [2022-11-23 01:56:34,934 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 01:56:34,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8879 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=3979, Invalid=30431, Unknown=0, NotChecked=0, Total=34410 [2022-11-23 01:56:34,937 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 250 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2752 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 2752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 01:56:34,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 158 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 2752 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 01:56:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 01:56:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-11-23 01:56:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-11-23 01:56:35,199 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 89 [2022-11-23 01:56:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:56:35,200 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-11-23 01:56:35,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.8840579710144927) internal successors, (260), 138 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-11-23 01:56:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 01:56:35,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:56:35,201 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:56:35,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-23 01:56:35,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 01:56:35,407 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:56:35,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash -869430475, now seen corresponding path program 25 times [2022-11-23 01:56:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803384961] [2022-11-23 01:56:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 210 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:36,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:36,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803384961] [2022-11-23 01:56:36,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803384961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:56:36,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298455325] [2022-11-23 01:56:36,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 01:56:36,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:56:36,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:56:36,699 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:56:36,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 01:56:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-23 01:56:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:56:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:37,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:56:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:39,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298455325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:56:39,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:56:39,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 91 [2022-11-23 01:56:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683360958] [2022-11-23 01:56:39,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:56:39,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-23 01:56:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-23 01:56:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=6852, Unknown=0, NotChecked=0, Total=8190 [2022-11-23 01:56:39,354 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:41,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:56:41,762 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2022-11-23 01:56:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 01:56:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-11-23 01:56:41,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:56:41,763 INFO L225 Difference]: With dead ends: 181 [2022-11-23 01:56:41,763 INFO L226 Difference]: Without dead ends: 179 [2022-11-23 01:56:41,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 114 SyntacticMatches, 21 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5961 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3215, Invalid=14875, Unknown=0, NotChecked=0, Total=18090 [2022-11-23 01:56:41,766 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 322 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 01:56:41,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 128 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 01:56:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-23 01:56:42,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 94. [2022-11-23 01:56:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-11-23 01:56:42,014 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2022-11-23 01:56:42,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:56:42,014 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-11-23 01:56:42,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:56:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-11-23 01:56:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-23 01:56:42,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:56:42,015 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:56:42,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 01:56:42,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:56:42,221 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:56:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:56:42,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1749306697, now seen corresponding path program 26 times [2022-11-23 01:56:42,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:56:42,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813096354] [2022-11-23 01:56:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:56:42,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:56:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:56:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:45,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:56:45,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813096354] [2022-11-23 01:56:45,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813096354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:56:45,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594438064] [2022-11-23 01:56:45,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:56:45,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:56:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:56:45,059 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:56:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 01:56:45,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:56:45,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:56:45,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-23 01:56:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:56:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:48,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:56:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:56:55,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594438064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:56:55,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:56:55,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50] total 143 [2022-11-23 01:56:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650534800] [2022-11-23 01:56:55,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:56:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-11-23 01:56:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:56:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-11-23 01:56:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2672, Invalid=17634, Unknown=0, NotChecked=0, Total=20306 [2022-11-23 01:56:55,012 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:18,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:57:18,906 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2022-11-23 01:57:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 01:57:18,906 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-11-23 01:57:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:57:18,907 INFO L225 Difference]: With dead ends: 258 [2022-11-23 01:57:18,907 INFO L226 Difference]: Without dead ends: 186 [2022-11-23 01:57:18,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17854 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=7494, Invalid=49388, Unknown=0, NotChecked=0, Total=56882 [2022-11-23 01:57:18,911 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 699 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 5750 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 6403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 5750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 01:57:18,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 684 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 5750 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-23 01:57:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-23 01:57:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 121. [2022-11-23 01:57:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2) internal successors, (144), 120 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-23 01:57:19,216 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 93 [2022-11-23 01:57:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:57:19,216 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-23 01:57:19,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.902097902097902) internal successors, (272), 143 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:19,216 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-23 01:57:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 01:57:19,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:57:19,217 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:57:19,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 01:57:19,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-23 01:57:19,417 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:57:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:57:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash 340008045, now seen corresponding path program 27 times [2022-11-23 01:57:19,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:57:19,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386911353] [2022-11-23 01:57:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:57:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:57:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:57:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:57:22,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:57:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386911353] [2022-11-23 01:57:22,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386911353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:57:22,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124409639] [2022-11-23 01:57:22,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 01:57:22,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:57:22,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:57:22,441 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:57:22,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 01:57:22,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-23 01:57:22,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:57:22,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-23 01:57:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:57:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:57:26,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:57:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:57:33,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124409639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:57:33,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:57:33,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 150 [2022-11-23 01:57:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173179453] [2022-11-23 01:57:33,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:57:33,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-23 01:57:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:57:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-23 01:57:33,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=19748, Unknown=0, NotChecked=0, Total=22350 [2022-11-23 01:57:33,051 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:57:49,248 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2022-11-23 01:57:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-23 01:57:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-11-23 01:57:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:57:49,249 INFO L225 Difference]: With dead ends: 200 [2022-11-23 01:57:49,250 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 01:57:49,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10427 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=4704, Invalid=35898, Unknown=0, NotChecked=0, Total=40602 [2022-11-23 01:57:49,253 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 256 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 3154 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 01:57:49,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 165 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3154 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 01:57:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 01:57:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-11-23 01:57:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2022-11-23 01:57:49,579 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 97 [2022-11-23 01:57:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:57:49,579 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2022-11-23 01:57:49,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.8933333333333333) internal successors, (284), 150 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2022-11-23 01:57:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 01:57:49,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:57:49,580 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:57:49,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-23 01:57:49,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-23 01:57:49,781 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:57:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:57:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1740727883, now seen corresponding path program 28 times [2022-11-23 01:57:49,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:57:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186374415] [2022-11-23 01:57:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:57:49,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:57:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:57:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 253 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:57:51,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:57:51,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186374415] [2022-11-23 01:57:51,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186374415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:57:51,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521348181] [2022-11-23 01:57:51,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 01:57:51,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:57:51,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:57:51,190 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:57:51,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 01:57:51,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 01:57:51,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:57:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-23 01:57:51,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:57:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:57:52,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:57:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:57:54,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521348181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:57:54,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:57:54,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-11-23 01:57:54,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267279320] [2022-11-23 01:57:54,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:57:54,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-23 01:57:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:57:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-23 01:57:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1579, Invalid=8123, Unknown=0, NotChecked=0, Total=9702 [2022-11-23 01:57:54,277 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:57:57,109 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2022-11-23 01:57:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-23 01:57:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-23 01:57:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:57:57,116 INFO L225 Difference]: With dead ends: 197 [2022-11-23 01:57:57,116 INFO L226 Difference]: Without dead ends: 195 [2022-11-23 01:57:57,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 124 SyntacticMatches, 23 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7127 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3795, Invalid=17667, Unknown=0, NotChecked=0, Total=21462 [2022-11-23 01:57:57,117 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 286 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 01:57:57,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 145 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 01:57:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-23 01:57:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 102. [2022-11-23 01:57:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-11-23 01:57:57,379 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-11-23 01:57:57,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:57:57,379 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-11-23 01:57:57,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:57:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-11-23 01:57:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 01:57:57,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:57:57,380 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:57:57,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-23 01:57:57,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:57:57,581 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:57:57,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:57:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash -584405303, now seen corresponding path program 29 times [2022-11-23 01:57:57,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:57:57,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202159786] [2022-11-23 01:57:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:57:57,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:57:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:58:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:58:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:58:00,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202159786] [2022-11-23 01:58:00,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202159786] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:58:00,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100561551] [2022-11-23 01:58:00,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 01:58:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:58:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:58:00,870 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:58:00,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 01:58:01,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-23 01:58:01,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:58:01,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-23 01:58:01,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:58:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:58:03,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:58:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:58:09,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100561551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:58:09,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:58:09,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 54] total 131 [2022-11-23 01:58:09,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117027029] [2022-11-23 01:58:09,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:58:09,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-23 01:58:09,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:58:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-23 01:58:09,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2468, Invalid=14562, Unknown=0, NotChecked=0, Total=17030 [2022-11-23 01:58:09,775 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:58:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:58:36,765 INFO L93 Difference]: Finished difference Result 280 states and 308 transitions. [2022-11-23 01:58:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-11-23 01:58:36,766 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-23 01:58:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:58:36,766 INFO L225 Difference]: With dead ends: 280 [2022-11-23 01:58:36,767 INFO L226 Difference]: Without dead ends: 202 [2022-11-23 01:58:36,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14628 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=7463, Invalid=47059, Unknown=0, NotChecked=0, Total=54522 [2022-11-23 01:58:36,769 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 773 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 5792 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 6559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 5792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 01:58:36,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 709 Invalid, 6559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 5792 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 01:58:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-23 01:58:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2022-11-23 01:58:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2) internal successors, (156), 130 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:58:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2022-11-23 01:58:37,155 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 101 [2022-11-23 01:58:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:58:37,156 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2022-11-23 01:58:37,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0763358778625953) internal successors, (272), 131 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:58:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2022-11-23 01:58:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-23 01:58:37,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:58:37,157 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:58:37,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-23 01:58:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:58:37,363 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:58:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:58:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2091445523, now seen corresponding path program 30 times [2022-11-23 01:58:37,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:58:37,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579383397] [2022-11-23 01:58:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:58:37,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:58:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:58:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:58:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:58:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579383397] [2022-11-23 01:58:40,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579383397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:58:40,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787391397] [2022-11-23 01:58:40,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 01:58:40,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:58:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:58:40,807 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:58:40,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-23 01:58:40,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-23 01:58:40,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:58:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-23 01:58:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:58:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:58:46,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:58:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:58:53,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787391397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:58:53,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:58:53,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 58, 58] total 166 [2022-11-23 01:58:53,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803311900] [2022-11-23 01:58:53,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:58:53,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-11-23 01:58:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:58:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-11-23 01:58:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3154, Invalid=24236, Unknown=0, NotChecked=0, Total=27390 [2022-11-23 01:58:53,796 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:59:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:59:14,451 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2022-11-23 01:59:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-23 01:59:14,452 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-11-23 01:59:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:59:14,453 INFO L225 Difference]: With dead ends: 216 [2022-11-23 01:59:14,453 INFO L226 Difference]: Without dead ends: 135 [2022-11-23 01:59:14,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13263 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=5667, Invalid=43839, Unknown=0, NotChecked=0, Total=49506 [2022-11-23 01:59:14,457 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 324 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 3289 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 3771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 3289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 01:59:14,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 156 Invalid, 3771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 3289 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 01:59:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-23 01:59:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-11-23 01:59:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 130 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:59:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2022-11-23 01:59:14,849 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 105 [2022-11-23 01:59:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:59:14,849 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2022-11-23 01:59:14,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.855421686746988) internal successors, (308), 166 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:59:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2022-11-23 01:59:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 01:59:14,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:59:14,850 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:59:14,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-23 01:59:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-23 01:59:15,053 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:59:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:59:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1966880715, now seen corresponding path program 31 times [2022-11-23 01:59:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:59:15,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970047951] [2022-11-23 01:59:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:59:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:59:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:59:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 300 proven. 927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:59:16,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:59:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970047951] [2022-11-23 01:59:16,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970047951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:59:16,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431838665] [2022-11-23 01:59:16,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 01:59:16,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:59:16,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:59:16,838 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:59:16,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 01:59:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:59:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-23 01:59:16,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:59:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:59:18,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:59:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 0 proven. 1227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:59:20,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431838665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:59:20,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:59:20,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-11-23 01:59:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718678222] [2022-11-23 01:59:20,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:59:20,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-23 01:59:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:59:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-23 01:59:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1840, Invalid=9502, Unknown=0, NotChecked=0, Total=11342 [2022-11-23 01:59:20,366 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:59:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 01:59:23,644 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2022-11-23 01:59:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-23 01:59:23,644 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-11-23 01:59:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 01:59:23,646 INFO L225 Difference]: With dead ends: 213 [2022-11-23 01:59:23,646 INFO L226 Difference]: Without dead ends: 211 [2022-11-23 01:59:23,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 134 SyntacticMatches, 25 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8397 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4423, Invalid=20699, Unknown=0, NotChecked=0, Total=25122 [2022-11-23 01:59:23,647 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 326 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 01:59:23,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 161 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 01:59:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-23 01:59:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 110. [2022-11-23 01:59:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:59:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-11-23 01:59:23,938 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 106 [2022-11-23 01:59:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 01:59:23,939 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-11-23 01:59:23,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.514018691588785) internal successors, (162), 107 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 01:59:23,939 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-11-23 01:59:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 01:59:23,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 01:59:23,940 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 01:59:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-23 01:59:24,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-23 01:59:24,146 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 01:59:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 01:59:24,146 INFO L85 PathProgramCache]: Analyzing trace with hash 900264009, now seen corresponding path program 32 times [2022-11-23 01:59:24,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 01:59:24,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910088182] [2022-11-23 01:59:24,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 01:59:24,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 01:59:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 01:59:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 852 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:59:27,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 01:59:27,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910088182] [2022-11-23 01:59:27,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910088182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 01:59:27,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006482966] [2022-11-23 01:59:27,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 01:59:27,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 01:59:27,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 01:59:27,907 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 01:59:27,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 01:59:28,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 01:59:28,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 01:59:28,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-23 01:59:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 01:59:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:59:30,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 01:59:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 01:59:37,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006482966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 01:59:37,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 01:59:37,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 138 [2022-11-23 01:59:37,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465471571] [2022-11-23 01:59:37,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 01:59:37,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-23 01:59:37,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 01:59:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-23 01:59:37,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2715, Invalid=16191, Unknown=0, NotChecked=0, Total=18906 [2022-11-23 01:59:37,570 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:05,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:00:05,065 INFO L93 Difference]: Finished difference Result 302 states and 332 transitions. [2022-11-23 02:00:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-23 02:00:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-23 02:00:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:00:05,067 INFO L225 Difference]: With dead ends: 302 [2022-11-23 02:00:05,067 INFO L226 Difference]: Without dead ends: 218 [2022-11-23 02:00:05,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16275 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=8324, Invalid=52932, Unknown=0, NotChecked=0, Total=61256 [2022-11-23 02:00:05,070 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 802 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 6827 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 7697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 6827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:00:05,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 846 Invalid, 7697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 6827 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-23 02:00:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-23 02:00:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 141. [2022-11-23 02:00:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2) internal successors, (168), 140 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2022-11-23 02:00:05,548 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 109 [2022-11-23 02:00:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:00:05,549 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2022-11-23 02:00:05,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2022-11-23 02:00:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-23 02:00:05,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:00:05,550 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:00:05,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-23 02:00:05,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-23 02:00:05,750 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:00:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:00:05,751 INFO L85 PathProgramCache]: Analyzing trace with hash -369219219, now seen corresponding path program 33 times [2022-11-23 02:00:05,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:00:05,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009615950] [2022-11-23 02:00:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:00:05,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:00:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:00:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 925 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:00:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:00:09,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009615950] [2022-11-23 02:00:09,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009615950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:00:09,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974050475] [2022-11-23 02:00:09,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:00:09,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:00:09,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:00:09,825 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:00:09,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-23 02:00:09,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-23 02:00:09,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:00:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-23 02:00:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:00:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:00:15,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:00:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:00:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974050475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:00:23,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:00:23,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60, 60] total 174 [2022-11-23 02:00:23,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277121151] [2022-11-23 02:00:23,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:00:23,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-11-23 02:00:23,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:00:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-11-23 02:00:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3478, Invalid=26624, Unknown=0, NotChecked=0, Total=30102 [2022-11-23 02:00:23,675 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:00:46,243 INFO L93 Difference]: Finished difference Result 232 states and 260 transitions. [2022-11-23 02:00:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-23 02:00:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-11-23 02:00:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:00:46,246 INFO L225 Difference]: With dead ends: 232 [2022-11-23 02:00:46,246 INFO L226 Difference]: Without dead ends: 145 [2022-11-23 02:00:46,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14071 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=6260, Invalid=48262, Unknown=0, NotChecked=0, Total=54522 [2022-11-23 02:00:46,249 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 306 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3638 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 4164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 3638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 02:00:46,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 171 Invalid, 4164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 3638 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 02:00:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-23 02:00:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2022-11-23 02:00:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 140 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2022-11-23 02:00:46,710 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 113 [2022-11-23 02:00:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:00:46,710 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2022-11-23 02:00:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.9080459770114941) internal successors, (332), 174 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2022-11-23 02:00:46,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-23 02:00:46,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:00:46,711 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:00:46,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-23 02:00:46,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-23 02:00:46,912 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:00:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:00:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash -618326347, now seen corresponding path program 34 times [2022-11-23 02:00:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:00:46,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126499885] [2022-11-23 02:00:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:00:46,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:00:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:00:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 351 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:00:48,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:00:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126499885] [2022-11-23 02:00:48,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126499885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:00:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805522909] [2022-11-23 02:00:48,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:00:48,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:00:48,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:00:48,851 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:00:48,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-23 02:00:48,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:00:48,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:00:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-23 02:00:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:00:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:00:50,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:00:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 1433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:00:52,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805522909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:00:52,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:00:52,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2022-11-23 02:00:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039072209] [2022-11-23 02:00:52,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:00:52,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-23 02:00:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:00:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-23 02:00:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2121, Invalid=10989, Unknown=0, NotChecked=0, Total=13110 [2022-11-23 02:00:52,930 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:00:56,601 INFO L93 Difference]: Finished difference Result 229 states and 256 transitions. [2022-11-23 02:00:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-23 02:00:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-11-23 02:00:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:00:56,603 INFO L225 Difference]: With dead ends: 229 [2022-11-23 02:00:56,603 INFO L226 Difference]: Without dead ends: 227 [2022-11-23 02:00:56,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 144 SyntacticMatches, 27 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9771 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5099, Invalid=23971, Unknown=0, NotChecked=0, Total=29070 [2022-11-23 02:00:56,606 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 424 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 02:00:56,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 159 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 02:00:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-23 02:00:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 118. [2022-11-23 02:00:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-11-23 02:00:56,969 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 114 [2022-11-23 02:00:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:00:56,969 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-11-23 02:00:56,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:00:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-11-23 02:00:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-23 02:00:56,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:00:56,970 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:00:56,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-23 02:00:57,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:00:57,171 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:00:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:00:57,171 INFO L85 PathProgramCache]: Analyzing trace with hash 559354313, now seen corresponding path program 35 times [2022-11-23 02:00:57,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:00:57,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199408698] [2022-11-23 02:00:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:00:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:00:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:01:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 1001 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:01:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:01:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199408698] [2022-11-23 02:01:01,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199408698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:01:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686954403] [2022-11-23 02:01:01,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:01:01,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:01:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:01:01,658 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:01:01,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 02:01:01,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-11-23 02:01:01,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:01:01,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-23 02:01:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:01:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:01:04,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:01:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:01:13,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686954403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:01:13,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:01:13,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 62] total 151 [2022-11-23 02:01:13,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712735023] [2022-11-23 02:01:13,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:01:13,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-11-23 02:01:13,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:01:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-11-23 02:01:13,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3266, Invalid=19384, Unknown=0, NotChecked=0, Total=22650 [2022-11-23 02:01:13,085 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:01:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:01:44,886 INFO L93 Difference]: Finished difference Result 324 states and 356 transitions. [2022-11-23 02:01:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-23 02:01:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-23 02:01:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:01:44,888 INFO L225 Difference]: With dead ends: 324 [2022-11-23 02:01:44,888 INFO L226 Difference]: Without dead ends: 234 [2022-11-23 02:01:44,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19159 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=9735, Invalid=61821, Unknown=0, NotChecked=0, Total=71556 [2022-11-23 02:01:44,891 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 951 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 7529 mSolverCounterSat, 985 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 8514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 985 IncrementalHoareTripleChecker+Valid, 7529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:01:44,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 950 Invalid, 8514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [985 Valid, 7529 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 02:01:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-23 02:01:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 151. [2022-11-23 02:01:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.2) internal successors, (180), 150 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:01:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2022-11-23 02:01:45,446 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 117 [2022-11-23 02:01:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:01:45,446 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2022-11-23 02:01:45,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.0927152317880795) internal successors, (316), 151 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:01:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2022-11-23 02:01:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 02:01:45,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:01:45,447 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:01:45,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-23 02:01:45,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-23 02:01:45,648 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:01:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:01:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash 430006253, now seen corresponding path program 36 times [2022-11-23 02:01:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:01:45,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020174138] [2022-11-23 02:01:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:01:45,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:01:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:01:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1080 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:01:50,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:01:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020174138] [2022-11-23 02:01:50,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020174138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:01:50,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719752669] [2022-11-23 02:01:50,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:01:50,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:01:50,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:01:50,235 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:01:50,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-23 02:01:50,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-11-23 02:01:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:01:50,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-23 02:01:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:01:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:01:57,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:02:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:02:06,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719752669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:02:06,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:02:06,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 66, 66] total 190 [2022-11-23 02:02:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069085594] [2022-11-23 02:02:06,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:02:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-11-23 02:02:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:02:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-11-23 02:02:06,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=31803, Unknown=0, NotChecked=0, Total=35910 [2022-11-23 02:02:06,636 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:02:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:02:33,831 INFO L93 Difference]: Finished difference Result 248 states and 278 transitions. [2022-11-23 02:02:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-23 02:02:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-23 02:02:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:02:33,833 INFO L225 Difference]: With dead ends: 248 [2022-11-23 02:02:33,833 INFO L226 Difference]: Without dead ends: 155 [2022-11-23 02:02:33,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17194 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=7466, Invalid=57814, Unknown=0, NotChecked=0, Total=65280 [2022-11-23 02:02:33,836 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 411 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 3751 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 4350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 3751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 02:02:33,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 159 Invalid, 4350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 3751 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 02:02:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-23 02:02:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-11-23 02:02:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:02:34,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2022-11-23 02:02:34,387 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 121 [2022-11-23 02:02:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:02:34,387 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2022-11-23 02:02:34,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.8736842105263158) internal successors, (356), 190 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:02:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2022-11-23 02:02:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 02:02:34,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:02:34,388 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:02:34,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-23 02:02:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-23 02:02:34,588 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:02:34,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:02:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1832221387, now seen corresponding path program 37 times [2022-11-23 02:02:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:02:34,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405659942] [2022-11-23 02:02:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:02:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:02:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:02:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 406 proven. 1249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:02:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:02:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405659942] [2022-11-23 02:02:36,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405659942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:02:36,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835221841] [2022-11-23 02:02:36,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:02:36,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:02:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:02:36,927 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:02:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-23 02:02:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:02:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 02:02:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:02:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:02:39,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:02:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:02:41,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835221841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:02:41,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:02:41,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2022-11-23 02:02:41,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505166564] [2022-11-23 02:02:41,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:02:41,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 02:02:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:02:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 02:02:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2422, Invalid=12584, Unknown=0, NotChecked=0, Total=15006 [2022-11-23 02:02:41,562 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:02:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:02:45,827 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2022-11-23 02:02:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-23 02:02:45,827 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2022-11-23 02:02:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:02:45,828 INFO L225 Difference]: With dead ends: 245 [2022-11-23 02:02:45,828 INFO L226 Difference]: Without dead ends: 243 [2022-11-23 02:02:45,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 154 SyntacticMatches, 29 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11249 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=5823, Invalid=27483, Unknown=0, NotChecked=0, Total=33306 [2022-11-23 02:02:45,831 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 600 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 02:02:45,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 162 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 02:02:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-23 02:02:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 126. [2022-11-23 02:02:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:02:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-11-23 02:02:46,304 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2022-11-23 02:02:46,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:02:46,305 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-11-23 02:02:46,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.5121951219512195) internal successors, (186), 123 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:02:46,305 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-11-23 02:02:46,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 02:02:46,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:02:46,306 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:02:46,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-23 02:02:46,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:02:46,506 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:02:46,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:02:46,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849993, now seen corresponding path program 38 times [2022-11-23 02:02:46,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:02:46,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056637501] [2022-11-23 02:02:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:02:46,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:02:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:02:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 1162 proven. 579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:02:51,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:02:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056637501] [2022-11-23 02:02:51,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056637501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:02:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051475894] [2022-11-23 02:02:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:02:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:02:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:02:51,415 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:02:51,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 02:02:51,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:02:51,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:02:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-23 02:02:51,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:02:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:02:57,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:03:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:03:08,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051475894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:03:08,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:03:08,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 66] total 191 [2022-11-23 02:03:08,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953355696] [2022-11-23 02:03:08,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:03:08,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-11-23 02:03:08,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:03:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-11-23 02:03:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4708, Invalid=31582, Unknown=0, NotChecked=0, Total=36290 [2022-11-23 02:03:08,535 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:03:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:03:54,043 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2022-11-23 02:03:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-23 02:03:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-11-23 02:03:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:03:54,046 INFO L225 Difference]: With dead ends: 346 [2022-11-23 02:03:54,046 INFO L226 Difference]: Without dead ends: 250 [2022-11-23 02:03:54,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32146 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=13178, Invalid=88264, Unknown=0, NotChecked=0, Total=101442 [2022-11-23 02:03:54,050 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1087 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 9245 mSolverCounterSat, 1126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 10371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 9245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:03:54,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 1136 Invalid, 10371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1126 Valid, 9245 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 02:03:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-23 02:03:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 161. [2022-11-23 02:03:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.2) internal successors, (192), 160 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:03:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2022-11-23 02:03:54,767 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 125 [2022-11-23 02:03:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:03:54,767 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2022-11-23 02:03:54,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.9267015706806283) internal successors, (368), 191 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:03:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2022-11-23 02:03:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-23 02:03:54,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:03:54,769 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:03:54,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-23 02:03:54,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:03:54,979 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:03:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:03:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash 900249197, now seen corresponding path program 39 times [2022-11-23 02:03:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:03:54,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568642423] [2022-11-23 02:03:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:03:54,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:03:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:04:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 1247 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:04:00,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:04:00,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568642423] [2022-11-23 02:04:00,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568642423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:04:00,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36442212] [2022-11-23 02:04:00,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:04:00,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:04:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:04:00,243 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:04:00,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-23 02:04:00,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-11-23 02:04:00,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:04:00,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-23 02:04:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:04:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:04:08,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:04:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:04:19,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36442212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:04:19,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:04:19,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 70, 70] total 202 [2022-11-23 02:04:19,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641159609] [2022-11-23 02:04:19,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:04:19,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-11-23 02:04:19,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:04:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-11-23 02:04:19,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4633, Invalid=35969, Unknown=0, NotChecked=0, Total=40602 [2022-11-23 02:04:19,394 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:04:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:04:51,916 INFO L93 Difference]: Finished difference Result 264 states and 296 transitions. [2022-11-23 02:04:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-23 02:04:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-11-23 02:04:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:04:51,918 INFO L225 Difference]: With dead ends: 264 [2022-11-23 02:04:51,918 INFO L226 Difference]: Without dead ends: 165 [2022-11-23 02:04:51,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19314 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=8310, Invalid=64860, Unknown=0, NotChecked=0, Total=73170 [2022-11-23 02:04:51,921 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 400 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5268 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 6003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 5268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:04:51,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 218 Invalid, 6003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 5268 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 02:04:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-23 02:04:52,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-11-23 02:04:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:04:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2022-11-23 02:04:52,790 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 129 [2022-11-23 02:04:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:04:52,790 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2022-11-23 02:04:52,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 1.881188118811881) internal successors, (380), 202 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:04:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2022-11-23 02:04:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 02:04:52,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:04:52,792 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:04:52,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-23 02:04:52,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-23 02:04:52,995 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:04:52,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:04:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash 219943861, now seen corresponding path program 40 times [2022-11-23 02:04:52,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:04:52,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168409847] [2022-11-23 02:04:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:04:52,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:04:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:04:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 465 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:04:55,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:04:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168409847] [2022-11-23 02:04:55,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168409847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:04:55,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107004562] [2022-11-23 02:04:55,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:04:55,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:04:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:04:55,559 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:04:55,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-23 02:04:55,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:04:55,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:04:55,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-23 02:04:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:04:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:04:57,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:05:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:05:00,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107004562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:05:00,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:05:00,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-11-23 02:05:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196487116] [2022-11-23 02:05:00,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:05:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-23 02:05:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:05:00,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-23 02:05:00,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2743, Invalid=14287, Unknown=0, NotChecked=0, Total=17030 [2022-11-23 02:05:00,776 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:05:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:05:05,651 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-11-23 02:05:05,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-23 02:05:05,651 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-23 02:05:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:05:05,652 INFO L225 Difference]: With dead ends: 261 [2022-11-23 02:05:05,652 INFO L226 Difference]: Without dead ends: 259 [2022-11-23 02:05:05,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 164 SyntacticMatches, 31 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12831 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6595, Invalid=31235, Unknown=0, NotChecked=0, Total=37830 [2022-11-23 02:05:05,654 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 478 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:05:05,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 173 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1838 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 02:05:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-23 02:05:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 134. [2022-11-23 02:05:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:05:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-11-23 02:05:06,163 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 130 [2022-11-23 02:05:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:05:06,163 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-11-23 02:05:06,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.5114503816793894) internal successors, (198), 131 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:05:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-11-23 02:05:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-23 02:05:06,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:05:06,164 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:05:06,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-23 02:05:06,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-23 02:05:06,364 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:05:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:05:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1767705399, now seen corresponding path program 41 times [2022-11-23 02:05:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:05:06,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033283498] [2022-11-23 02:05:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:05:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:05:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:05:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 1335 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:05:11,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:05:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033283498] [2022-11-23 02:05:11,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033283498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:05:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645817740] [2022-11-23 02:05:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:05:11,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:05:11,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:05:11,897 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:05:11,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7cce77-4dbc-4c98-9638-05376aaef9cc/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 02:05:12,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-11-23 02:05:12,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:05:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 142 conjunts are in the unsatisfiable core [2022-11-23 02:05:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:05:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:05:16,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:05:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:05:26,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645817740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:05:26,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:05:26,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 70] total 171 [2022-11-23 02:05:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91207751] [2022-11-23 02:05:26,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:05:26,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-11-23 02:05:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:05:26,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-11-23 02:05:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4174, Invalid=24896, Unknown=0, NotChecked=0, Total=29070 [2022-11-23 02:05:26,619 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 171 states, 171 states have (on average 2.1052631578947367) internal successors, (360), 171 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)