./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de62.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN --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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- 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-6b4ec56 [2022-11-20 09:27:49,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:49,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:49,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:49,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:49,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:49,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:49,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:49,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:49,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:49,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:49,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:49,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:49,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:49,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:49,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:49,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:49,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:49,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:49,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:49,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:49,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:49,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:49,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:49,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:49,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:49,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:49,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:49,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:49,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:49,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:49,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:49,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:49,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:49,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:49,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:49,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:49,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:49,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:49,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:49,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:49,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:27:49,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:49,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:49,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:49,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:49,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:49,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:49,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:49,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:49,159 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:49,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:49,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:49,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:49,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:49,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:49,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:27:49,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:49,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:27:49,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:49,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:27:49,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:49,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:27:49,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:49,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:49,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:49,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:49,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:49,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:49,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:27:49,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:49,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:49,165 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:27:49,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:27:49,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:27:49,166 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2022-11-20 09:27:49,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:49,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:49,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:49,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:49,511 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:49,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-20 09:27:52,547 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:52,732 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:52,732 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/sv-benchmarks/c/loops-crafted-1/in-de62.c [2022-11-20 09:27:52,740 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/data/624793a86/6a1667e29b2b41788678027756e3a22d/FLAGe2ebc32ca [2022-11-20 09:27:52,762 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/data/624793a86/6a1667e29b2b41788678027756e3a22d [2022-11-20 09:27:52,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:52,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:52,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:52,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:52,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:52,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:52" (1/1) ... [2022-11-20 09:27:52,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe0d169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:52, skipping insertion in model container [2022-11-20 09:27:52,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:52" (1/1) ... [2022-11-20 09:27:52,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:52,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:52,948 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_c372b294-aa13-4fe6-af30-9d7de80c4239/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-20 09:27:52,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:52,976 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:52,988 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_c372b294-aa13-4fe6-af30-9d7de80c4239/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2022-11-20 09:27:52,993 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:53,008 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:53,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53 WrapperNode [2022-11-20 09:27:53,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:53,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:53,010 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:53,010 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:53,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,043 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-20 09:27:53,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:53,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:53,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:53,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:53,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,065 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:53,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:53,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:53,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:53,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (1/1) ... [2022-11-20 09:27:53,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:53,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:53,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:53,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:53,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:53,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:53,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:27:53,246 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:53,249 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:53,479 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:53,496 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:53,496 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 09:27:53,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:53 BoogieIcfgContainer [2022-11-20 09:27:53,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:53,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:53,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:53,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:53,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:52" (1/3) ... [2022-11-20 09:27:53,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fcca0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:53, skipping insertion in model container [2022-11-20 09:27:53,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:53" (2/3) ... [2022-11-20 09:27:53,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fcca0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:53, skipping insertion in model container [2022-11-20 09:27:53,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:53" (3/3) ... [2022-11-20 09:27:53,524 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2022-11-20 09:27:53,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:53,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:27:53,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:53,638 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;@62ac858b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:53,639 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:27:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2022-11-20 09:27:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:27:53,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:53,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:53,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2022-11-20 09:27:53,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:53,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294880782] [2022-11-20 09:27:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:53,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:53,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294880782] [2022-11-20 09:27:53,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294880782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:53,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:53,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392350228] [2022-11-20 09:27:53,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:53,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:53,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:53,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:53,933 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-11-20 09:27:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:53,965 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2022-11-20 09:27:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2022-11-20 09:27:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:53,980 INFO L225 Difference]: With dead ends: 31 [2022-11-20 09:27:53,980 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 09:27:53,984 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 [2022-11-20 09:27:53,989 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2022-11-20 09:27:53,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 09:27:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-20 09:27:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 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) [2022-11-20 09:27:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2022-11-20 09:27:54,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2022-11-20 09:27:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:54,026 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2022-11-20 09:27:54,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2022-11-20 09:27:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2022-11-20 09:27:54,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:27:54,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:54,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:54,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:27:54,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2022-11-20 09:27:54,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294083038] [2022-11-20 09:27:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:54,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294083038] [2022-11-20 09:27:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294083038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:54,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:54,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:27:54,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248156352] [2022-11-20 09:27:54,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:54,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:54,425 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-20 09:27:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:54,510 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2022-11-20 09:27:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:54,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-11-20 09:27:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:54,511 INFO L225 Difference]: With dead ends: 27 [2022-11-20 09:27:54,512 INFO L226 Difference]: Without dead ends: 18 [2022-11-20 09:27:54,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:27:54,513 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:54,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-20 09:27:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-20 09:27:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2022-11-20 09:27:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-11-20 09:27:54,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2022-11-20 09:27:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:54,527 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-11-20 09:27:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-11-20 09:27:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-11-20 09:27:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:27:54,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:54,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:54,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:27:54,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2022-11-20 09:27:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683575627] [2022-11-20 09:27:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683575627] [2022-11-20 09:27:54,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683575627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:54,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:54,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774624738] [2022-11-20 09:27:54,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:54,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:54,572 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-20 09:27:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:54,625 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2022-11-20 09:27:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:54,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 [2022-11-20 09:27:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:54,626 INFO L225 Difference]: With dead ends: 41 [2022-11-20 09:27:54,626 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 09:27:54,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:54,628 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:54,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 09:27:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 09:27:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-11-20 09:27:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2022-11-20 09:27:54,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2022-11-20 09:27:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:54,649 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2022-11-20 09:27:54,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-20 09:27:54,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2022-11-20 09:27:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:27:54,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:54,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:27:54,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2022-11-20 09:27:54,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660025749] [2022-11-20 09:27:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:54,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660025749] [2022-11-20 09:27:54,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660025749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:54,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:54,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:54,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936052277] [2022-11-20 09:27:54,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:54,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:54,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:54,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:54,745 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-20 09:27:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:54,781 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-11-20 09:27:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:54,781 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 [2022-11-20 09:27:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:54,782 INFO L225 Difference]: With dead ends: 43 [2022-11-20 09:27:54,782 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 09:27:54,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:54,784 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:54,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 09:27:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 09:27:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 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) [2022-11-20 09:27:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-11-20 09:27:54,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2022-11-20 09:27:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:54,798 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-11-20 09:27:54,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-20 09:27:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-11-20 09:27:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:27:54,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:54,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:54,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:27:54,800 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2022-11-20 09:27:54,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843831139] [2022-11-20 09:27:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:54,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843831139] [2022-11-20 09:27:54,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843831139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:54,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:54,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:27:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843568810] [2022-11-20 09:27:54,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:54,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:54,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:54,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:54,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:54,930 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-20 09:27:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:55,002 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-11-20 09:27:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:55,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2022-11-20 09:27:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:55,004 INFO L225 Difference]: With dead ends: 41 [2022-11-20 09:27:55,004 INFO L226 Difference]: Without dead ends: 28 [2022-11-20 09:27:55,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:27:55,006 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:55,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-20 09:27:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-20 09:27:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 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) [2022-11-20 09:27:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-11-20 09:27:55,015 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2022-11-20 09:27:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:55,015 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-11-20 09:27:55,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-20 09:27:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-11-20 09:27:55,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:27:55,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:55,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:55,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:27:55,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2022-11-20 09:27:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:55,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500381702] [2022-11-20 09:27:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:55,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500381702] [2022-11-20 09:27:55,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500381702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871703955] [2022-11-20 09:27:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:55,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:55,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:55,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:27:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:55,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:55,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:55,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871703955] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:55,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:55,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2022-11-20 09:27:55,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158065963] [2022-11-20 09:27:55,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:55,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:55,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:55,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:55,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:27:55,453 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-20 09:27:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:55,530 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-11-20 09:27:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2022-11-20 09:27:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:55,532 INFO L225 Difference]: With dead ends: 35 [2022-11-20 09:27:55,532 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 09:27:55,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:27:55,534 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:55,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:55,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 09:27:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 09:27:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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) [2022-11-20 09:27:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-20 09:27:55,542 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2022-11-20 09:27:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:55,543 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-20 09:27:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-20 09:27:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-20 09:27:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 09:27:55,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:55,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:55,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:55,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:55,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2022-11-20 09:27:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:55,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393759203] [2022-11-20 09:27:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:27:55,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393759203] [2022-11-20 09:27:55,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393759203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547333135] [2022-11-20 09:27:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:55,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:55,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:27:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:27:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:55,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:55,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547333135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:55,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:55,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2022-11-20 09:27:55,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930604561] [2022-11-20 09:27:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:55,994 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-11-20 09:27:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:56,208 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2022-11-20 09:27:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:27:56,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) Word has length 16 [2022-11-20 09:27:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:56,211 INFO L225 Difference]: With dead ends: 103 [2022-11-20 09:27:56,211 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 09:27:56,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:27:56,212 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:56,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 74 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 09:27:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2022-11-20 09:27:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 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) [2022-11-20 09:27:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2022-11-20 09:27:56,243 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2022-11-20 09:27:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:56,243 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2022-11-20 09:27:56,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) [2022-11-20 09:27:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2022-11-20 09:27:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 09:27:56,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:56,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:56,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:56,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 09:27:56,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2022-11-20 09:27:56,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:56,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571885347] [2022-11-20 09:27:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:56,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571885347] [2022-11-20 09:27:56,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571885347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:56,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565511932] [2022-11-20 09:27:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:56,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:56,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:56,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:27:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:56,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:56,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565511932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:56,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:56,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-20 09:27:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66135191] [2022-11-20 09:27:56,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:56,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:56,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:56,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:56,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:56,710 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-20 09:27:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:56,801 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2022-11-20 09:27:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 16 [2022-11-20 09:27:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:56,805 INFO L225 Difference]: With dead ends: 101 [2022-11-20 09:27:56,806 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 09:27:56,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:56,811 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:56,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 09:27:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2022-11-20 09:27:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 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) [2022-11-20 09:27:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2022-11-20 09:27:56,869 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2022-11-20 09:27:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:56,870 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2022-11-20 09:27:56,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-20 09:27:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2022-11-20 09:27:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 09:27:56,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:56,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:56,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:57,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2022-11-20 09:27:57,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:57,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369094475] [2022-11-20 09:27:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:57,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369094475] [2022-11-20 09:27:57,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369094475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852540919] [2022-11-20 09:27:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:57,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:57,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:57,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:27:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:27:57,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:57,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:57,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852540919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:57,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:57,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-20 09:27:57,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770558207] [2022-11-20 09:27:57,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:57,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:27:57,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:27:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:27:57,509 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2022-11-20 09:27:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:57,784 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2022-11-20 09:27:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 09:27:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) Word has length 17 [2022-11-20 09:27:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:57,786 INFO L225 Difference]: With dead ends: 141 [2022-11-20 09:27:57,787 INFO L226 Difference]: Without dead ends: 112 [2022-11-20 09:27:57,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:57,790 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:57,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 72 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-20 09:27:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2022-11-20 09:27:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 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) [2022-11-20 09:27:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2022-11-20 09:27:57,844 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 17 [2022-11-20 09:27:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:57,845 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2022-11-20 09:27:57,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2022-11-20 09:27:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2022-11-20 09:27:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 09:27:57,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:57,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:57,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:58,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:58,052 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:58,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:58,052 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2022-11-20 09:27:58,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:58,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581761641] [2022-11-20 09:27:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:27:58,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:58,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581761641] [2022-11-20 09:27:58,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581761641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:58,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938574078] [2022-11-20 09:27:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:58,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:58,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:58,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:27:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:27:58,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:27:58,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:27:58,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938574078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:58,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:58,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-20 09:27:58,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992126735] [2022-11-20 09:27:58,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:58,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:27:58,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:27:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:27:58,379 INFO L87 Difference]: Start difference. First operand 90 states and 128 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-11-20 09:27:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:58,482 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2022-11-20 09:27:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 18 [2022-11-20 09:27:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:58,483 INFO L225 Difference]: With dead ends: 143 [2022-11-20 09:27:58,483 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 09:27:58,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:27:58,485 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:58,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 09:27:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-11-20 09:27:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 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) [2022-11-20 09:27:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2022-11-20 09:27:58,526 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2022-11-20 09:27:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:58,527 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2022-11-20 09:27:58,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-11-20 09:27:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2022-11-20 09:27:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 09:27:58,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:58,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:58,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:58,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:58,734 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2022-11-20 09:27:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:58,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137300205] [2022-11-20 09:27:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:27:58,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:58,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137300205] [2022-11-20 09:27:58,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137300205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:58,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164920659] [2022-11-20 09:27:58,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:58,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:58,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:58,836 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:58,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:27:58,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:27:58,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:27:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:27:58,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:27:59,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164920659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:59,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:59,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-20 09:27:59,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782847804] [2022-11-20 09:27:59,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:59,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:27:59,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:59,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:27:59,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:27:59,059 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-11-20 09:27:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:59,346 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2022-11-20 09:27:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:27:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 19 [2022-11-20 09:27:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:59,348 INFO L225 Difference]: With dead ends: 138 [2022-11-20 09:27:59,348 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 09:27:59,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:27:59,349 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:59,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 73 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 09:27:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2022-11-20 09:27:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 69 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) [2022-11-20 09:27:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2022-11-20 09:27:59,379 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2022-11-20 09:27:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:59,380 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2022-11-20 09:27:59,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2022-11-20 09:27:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2022-11-20 09:27:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 09:27:59,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:59,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:59,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:59,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 09:27:59,586 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2022-11-20 09:27:59,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:59,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338073158] [2022-11-20 09:27:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:59,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338073158] [2022-11-20 09:27:59,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338073158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:59,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279159930] [2022-11-20 09:27:59,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:59,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:59,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:59,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:59,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:27:59,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:27:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:59,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:27:59,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:27:59,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 09:27:59,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279159930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:59,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:59,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-11-20 09:27:59,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219297259] [2022-11-20 09:27:59,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:27:59,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:27:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:27:59,908 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2022-11-20 09:28:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:00,717 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2022-11-20 09:28:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 09:28:00,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 19 [2022-11-20 09:28:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:00,719 INFO L225 Difference]: With dead ends: 186 [2022-11-20 09:28:00,719 INFO L226 Difference]: Without dead ends: 152 [2022-11-20 09:28:00,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:28:00,721 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:00,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 139 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:28:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-20 09:28:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2022-11-20 09:28:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 88 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) [2022-11-20 09:28:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-11-20 09:28:00,764 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2022-11-20 09:28:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:00,764 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-11-20 09:28:00,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2022-11-20 09:28:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-11-20 09:28:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 09:28:00,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:00,765 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:00,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:00,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 09:28:00,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:00,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:00,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2022-11-20 09:28:00,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:00,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882797413] [2022-11-20 09:28:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:00,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:28:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882797413] [2022-11-20 09:28:01,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882797413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:01,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177158278] [2022-11-20 09:28:01,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:01,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:01,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:01,178 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:01,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:28:01,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:28:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:01,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:28:01,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 09:28:01,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 09:28:01,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177158278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:01,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:01,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2022-11-20 09:28:01,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290864032] [2022-11-20 09:28:01,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:01,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:28:01,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:01,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:28:01,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:28:01,429 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-11-20 09:28:02,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:02,315 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2022-11-20 09:28:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 09:28:02,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 [2022-11-20 09:28:02,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:02,316 INFO L225 Difference]: With dead ends: 208 [2022-11-20 09:28:02,316 INFO L226 Difference]: Without dead ends: 141 [2022-11-20 09:28:02,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:28:02,318 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:02,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:28:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-20 09:28:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2022-11-20 09:28:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 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) [2022-11-20 09:28:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2022-11-20 09:28:02,364 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2022-11-20 09:28:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:02,365 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2022-11-20 09:28:02,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-11-20 09:28:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2022-11-20 09:28:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:28:02,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:02,366 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:02,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:02,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:02,572 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2022-11-20 09:28:02,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:02,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002414182] [2022-11-20 09:28:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:02,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:02,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:02,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002414182] [2022-11-20 09:28:02,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002414182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:02,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124735340] [2022-11-20 09:28:02,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:02,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:02,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:02,779 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:02,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:28:02,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:28:02,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:28:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:03,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:03,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124735340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:03,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:03,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 23 [2022-11-20 09:28:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563597228] [2022-11-20 09:28:03,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:03,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 09:28:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 09:28:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:28:03,289 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2022-11-20 09:28:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:04,827 INFO L93 Difference]: Finished difference Result 183 states and 269 transitions. [2022-11-20 09:28:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 09:28:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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 22 [2022-11-20 09:28:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:04,829 INFO L225 Difference]: With dead ends: 183 [2022-11-20 09:28:04,829 INFO L226 Difference]: Without dead ends: 147 [2022-11-20 09:28:04,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 09:28:04,830 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 163 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:04,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 147 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:28:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-20 09:28:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2022-11-20 09:28:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3666666666666667) internal successors, (164), 120 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) [2022-11-20 09:28:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 164 transitions. [2022-11-20 09:28:04,890 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 164 transitions. Word has length 22 [2022-11-20 09:28:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:04,890 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 164 transitions. [2022-11-20 09:28:04,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2022-11-20 09:28:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 164 transitions. [2022-11-20 09:28:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 09:28:04,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:04,891 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:04,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:05,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 09:28:05,097 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1531208008, now seen corresponding path program 4 times [2022-11-20 09:28:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:05,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368864927] [2022-11-20 09:28:05,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:05,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:28:05,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:05,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368864927] [2022-11-20 09:28:05,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368864927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:05,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302184230] [2022-11-20 09:28:05,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:28:05,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:05,303 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:05,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:28:05,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:28:05,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:05,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:28:05,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:28:05,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 09:28:05,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302184230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:05,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:05,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-11-20 09:28:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751112574] [2022-11-20 09:28:05,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:05,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:28:05,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:28:05,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:28:05,501 INFO L87 Difference]: Start difference. First operand 121 states and 164 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-11-20 09:28:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:08,386 INFO L93 Difference]: Finished difference Result 421 states and 594 transitions. [2022-11-20 09:28:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-20 09:28:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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 22 [2022-11-20 09:28:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:08,388 INFO L225 Difference]: With dead ends: 421 [2022-11-20 09:28:08,388 INFO L226 Difference]: Without dead ends: 349 [2022-11-20 09:28:08,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=534, Invalid=5318, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 09:28:08,392 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 208 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:08,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 355 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:28:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-20 09:28:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 168. [2022-11-20 09:28:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3832335329341316) internal successors, (231), 167 states have internal predecessors, (231), 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) [2022-11-20 09:28:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 231 transitions. [2022-11-20 09:28:08,472 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 231 transitions. Word has length 22 [2022-11-20 09:28:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:08,472 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 231 transitions. [2022-11-20 09:28:08,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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) [2022-11-20 09:28:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 231 transitions. [2022-11-20 09:28:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 09:28:08,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:08,474 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:08,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:08,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 09:28:08,679 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:08,680 INFO L85 PathProgramCache]: Analyzing trace with hash -425830760, now seen corresponding path program 2 times [2022-11-20 09:28:08,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:08,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714646737] [2022-11-20 09:28:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:08,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:08,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714646737] [2022-11-20 09:28:08,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714646737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591668081] [2022-11-20 09:28:08,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:08,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:08,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:08,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:08,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 09:28:08,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:08,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:28:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:09,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 09:28:09,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591668081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:09,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:09,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 7] total 19 [2022-11-20 09:28:09,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751553574] [2022-11-20 09:28:09,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:09,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:28:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:28:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-11-20 09:28:09,253 INFO L87 Difference]: Start difference. First operand 168 states and 231 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-11-20 09:28:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:09,888 INFO L93 Difference]: Finished difference Result 378 states and 564 transitions. [2022-11-20 09:28:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:28:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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 24 [2022-11-20 09:28:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:09,890 INFO L225 Difference]: With dead ends: 378 [2022-11-20 09:28:09,890 INFO L226 Difference]: Without dead ends: 303 [2022-11-20 09:28:09,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:28:09,892 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 139 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:09,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 270 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:28:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-20 09:28:09,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 207. [2022-11-20 09:28:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3737864077669903) internal successors, (283), 206 states have internal predecessors, (283), 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) [2022-11-20 09:28:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 283 transitions. [2022-11-20 09:28:09,986 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 283 transitions. Word has length 24 [2022-11-20 09:28:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:09,986 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 283 transitions. [2022-11-20 09:28:09,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 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) [2022-11-20 09:28:09,987 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 283 transitions. [2022-11-20 09:28:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:28:09,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:09,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:10,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:10,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:10,200 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:10,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:10,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1713191597, now seen corresponding path program 4 times [2022-11-20 09:28:10,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:10,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705530689] [2022-11-20 09:28:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:28:10,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705530689] [2022-11-20 09:28:10,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705530689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:10,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822019821] [2022-11-20 09:28:10,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:28:10,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:10,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:10,383 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:10,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 09:28:10,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:28:10,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:28:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 09:28:10,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 09:28:10,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822019821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:10,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:10,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-11-20 09:28:10,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911653600] [2022-11-20 09:28:10,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:10,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:28:10,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:28:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:10,593 INFO L87 Difference]: Start difference. First operand 207 states and 283 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-20 09:28:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:12,552 INFO L93 Difference]: Finished difference Result 494 states and 651 transitions. [2022-11-20 09:28:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 09:28:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 [2022-11-20 09:28:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:12,555 INFO L225 Difference]: With dead ends: 494 [2022-11-20 09:28:12,555 INFO L226 Difference]: Without dead ends: 433 [2022-11-20 09:28:12,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=3785, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 09:28:12,558 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 213 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:12,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 216 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:28:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-11-20 09:28:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 207. [2022-11-20 09:28:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 states have internal predecessors, (281), 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) [2022-11-20 09:28:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-11-20 09:28:12,671 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 25 [2022-11-20 09:28:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:12,671 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-11-20 09:28:12,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2022-11-20 09:28:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-11-20 09:28:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 09:28:12,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:12,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:12,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:12,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 09:28:12,878 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 5 times [2022-11-20 09:28:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:12,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086449734] [2022-11-20 09:28:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:12,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:13,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086449734] [2022-11-20 09:28:13,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086449734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:13,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842502043] [2022-11-20 09:28:13,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:28:13,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:13,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:13,183 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:13,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 09:28:13,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:28:13,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:28:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:13,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:28:13,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842502043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:13,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:13,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 28 [2022-11-20 09:28:13,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451376441] [2022-11-20 09:28:13,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:13,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:28:13,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:13,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:28:13,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:28:13,835 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2022-11-20 09:28:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:15,969 INFO L93 Difference]: Finished difference Result 413 states and 608 transitions. [2022-11-20 09:28:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 09:28:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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 [2022-11-20 09:28:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:15,971 INFO L225 Difference]: With dead ends: 413 [2022-11-20 09:28:15,971 INFO L226 Difference]: Without dead ends: 354 [2022-11-20 09:28:15,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1036, Invalid=3254, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:28:15,974 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 264 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:15,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 221 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:28:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-20 09:28:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 243. [2022-11-20 09:28:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.359504132231405) internal successors, (329), 242 states have internal predecessors, (329), 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) [2022-11-20 09:28:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 329 transitions. [2022-11-20 09:28:16,103 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 329 transitions. Word has length 25 [2022-11-20 09:28:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:16,104 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 329 transitions. [2022-11-20 09:28:16,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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) [2022-11-20 09:28:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 329 transitions. [2022-11-20 09:28:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 09:28:16,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:16,105 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:16,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:16,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 09:28:16,311 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1282371252, now seen corresponding path program 6 times [2022-11-20 09:28:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:16,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372949711] [2022-11-20 09:28:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:28:16,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372949711] [2022-11-20 09:28:16,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372949711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:16,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950721974] [2022-11-20 09:28:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:28:16,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:16,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:16,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 09:28:16,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 09:28:16,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:16,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:28:16,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 09:28:16,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 09:28:16,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950721974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:16,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:16,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-11-20 09:28:16,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903404212] [2022-11-20 09:28:16,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:16,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:16,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:16,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:16,784 INFO L87 Difference]: Start difference. First operand 243 states and 329 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2022-11-20 09:28:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:21,689 INFO L93 Difference]: Finished difference Result 726 states and 927 transitions. [2022-11-20 09:28:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-20 09:28:21,690 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) Word has length 27 [2022-11-20 09:28:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:21,692 INFO L225 Difference]: With dead ends: 726 [2022-11-20 09:28:21,692 INFO L226 Difference]: Without dead ends: 661 [2022-11-20 09:28:21,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=960, Invalid=10170, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 09:28:21,696 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 303 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:21,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 374 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 09:28:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-20 09:28:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 258. [2022-11-20 09:28:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.3579766536964981) internal successors, (349), 257 states have internal predecessors, (349), 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) [2022-11-20 09:28:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 349 transitions. [2022-11-20 09:28:21,831 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 349 transitions. Word has length 27 [2022-11-20 09:28:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:21,831 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 349 transitions. [2022-11-20 09:28:21,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2022-11-20 09:28:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 349 transitions. [2022-11-20 09:28:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 09:28:21,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:21,832 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:21,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:22,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:22,033 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:22,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:22,033 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 1 times [2022-11-20 09:28:22,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:22,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712624989] [2022-11-20 09:28:22,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:22,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 09:28:22,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:22,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712624989] [2022-11-20 09:28:22,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712624989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:22,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894654652] [2022-11-20 09:28:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:22,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:22,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:22,310 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:22,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 09:28:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:28:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:22,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 09:28:22,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894654652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:22,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:22,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 16 [2022-11-20 09:28:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439570630] [2022-11-20 09:28:22,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:28:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:28:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:28:22,551 INFO L87 Difference]: Start difference. First operand 258 states and 349 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-11-20 09:28:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:23,367 INFO L93 Difference]: Finished difference Result 520 states and 765 transitions. [2022-11-20 09:28:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:28:23,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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 27 [2022-11-20 09:28:23,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:23,370 INFO L225 Difference]: With dead ends: 520 [2022-11-20 09:28:23,370 INFO L226 Difference]: Without dead ends: 457 [2022-11-20 09:28:23,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:28:23,371 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 126 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:23,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 375 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:28:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-20 09:28:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 320. [2022-11-20 09:28:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.3573667711598747) internal successors, (433), 319 states have internal predecessors, (433), 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) [2022-11-20 09:28:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 433 transitions. [2022-11-20 09:28:23,518 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 433 transitions. Word has length 27 [2022-11-20 09:28:23,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:23,519 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 433 transitions. [2022-11-20 09:28:23,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-11-20 09:28:23,519 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 433 transitions. [2022-11-20 09:28:23,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 09:28:23,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:23,520 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:23,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:23,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:23,721 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:23,721 INFO L85 PathProgramCache]: Analyzing trace with hash 967140136, now seen corresponding path program 3 times [2022-11-20 09:28:23,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:23,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632101646] [2022-11-20 09:28:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:23,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 09:28:23,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:23,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632101646] [2022-11-20 09:28:23,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632101646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:23,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960017565] [2022-11-20 09:28:23,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:23,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:23,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:23,899 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:23,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 09:28:23,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:28:23,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:23,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:28:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 09:28:24,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 09:28:24,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960017565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:24,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:24,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-20 09:28:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020560416] [2022-11-20 09:28:24,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:24,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:24,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:28:24,082 INFO L87 Difference]: Start difference. First operand 320 states and 433 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2022-11-20 09:28:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:24,698 INFO L93 Difference]: Finished difference Result 521 states and 677 transitions. [2022-11-20 09:28:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:28:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) Word has length 28 [2022-11-20 09:28:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:24,701 INFO L225 Difference]: With dead ends: 521 [2022-11-20 09:28:24,701 INFO L226 Difference]: Without dead ends: 494 [2022-11-20 09:28:24,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:24,703 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:24,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:24,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-11-20 09:28:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 325. [2022-11-20 09:28:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.3487654320987654) internal successors, (437), 324 states have internal predecessors, (437), 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) [2022-11-20 09:28:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 437 transitions. [2022-11-20 09:28:24,895 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 437 transitions. Word has length 28 [2022-11-20 09:28:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:24,895 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 437 transitions. [2022-11-20 09:28:24,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2022-11-20 09:28:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 437 transitions. [2022-11-20 09:28:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 09:28:24,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:24,897 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:24,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:25,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:25,102 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 7 times [2022-11-20 09:28:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:25,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461321856] [2022-11-20 09:28:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:25,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461321856] [2022-11-20 09:28:25,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461321856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786605440] [2022-11-20 09:28:25,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:28:25,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:25,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:25,431 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:25,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 09:28:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:28:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:28:25,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:28:25,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786605440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:25,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:25,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2022-11-20 09:28:25,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74837811] [2022-11-20 09:28:25,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:25,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 09:28:25,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:25,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 09:28:25,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:28:25,709 INFO L87 Difference]: Start difference. First operand 325 states and 437 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2022-11-20 09:28:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:39,958 INFO L93 Difference]: Finished difference Result 1049 states and 1343 transitions. [2022-11-20 09:28:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-20 09:28:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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 28 [2022-11-20 09:28:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:39,963 INFO L225 Difference]: With dead ends: 1049 [2022-11-20 09:28:39,963 INFO L226 Difference]: Without dead ends: 984 [2022-11-20 09:28:39,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14594 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=2296, Invalid=34376, Unknown=0, NotChecked=0, Total=36672 [2022-11-20 09:28:39,971 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 586 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:39,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 465 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-20 09:28:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-20 09:28:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 356. [2022-11-20 09:28:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.3549295774647887) internal successors, (481), 355 states have internal predecessors, (481), 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) [2022-11-20 09:28:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 481 transitions. [2022-11-20 09:28:40,158 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 481 transitions. Word has length 28 [2022-11-20 09:28:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:40,158 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 481 transitions. [2022-11-20 09:28:40,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2022-11-20 09:28:40,159 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 481 transitions. [2022-11-20 09:28:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 09:28:40,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:40,160 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:40,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:40,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:40,362 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:40,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:40,362 INFO L85 PathProgramCache]: Analyzing trace with hash 2063179469, now seen corresponding path program 4 times [2022-11-20 09:28:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:40,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634707793] [2022-11-20 09:28:40,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:40,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 09:28:40,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:40,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634707793] [2022-11-20 09:28:40,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634707793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:40,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321944995] [2022-11-20 09:28:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:28:40,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:40,639 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:40,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 09:28:40,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:28:40,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:40,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 09:28:40,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:40,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 09:28:40,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321944995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:40,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:40,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 17 [2022-11-20 09:28:40,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546762825] [2022-11-20 09:28:40,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:40,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:28:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:40,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:28:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:28:40,890 INFO L87 Difference]: Start difference. First operand 356 states and 481 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-11-20 09:28:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:41,930 INFO L93 Difference]: Finished difference Result 665 states and 975 transitions. [2022-11-20 09:28:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:28:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 [2022-11-20 09:28:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:41,933 INFO L225 Difference]: With dead ends: 665 [2022-11-20 09:28:41,933 INFO L226 Difference]: Without dead ends: 587 [2022-11-20 09:28:41,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:28:41,934 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 162 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:41,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 467 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:28:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-20 09:28:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 347. [2022-11-20 09:28:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.3728323699421965) internal successors, (475), 346 states have internal predecessors, (475), 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) [2022-11-20 09:28:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 475 transitions. [2022-11-20 09:28:42,221 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 475 transitions. Word has length 29 [2022-11-20 09:28:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:42,223 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 475 transitions. [2022-11-20 09:28:42,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-11-20 09:28:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 475 transitions. [2022-11-20 09:28:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 09:28:42,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:42,224 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:42,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:42,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 09:28:42,430 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:42,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2022-11-20 09:28:42,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:42,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898520931] [2022-11-20 09:28:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:42,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:28:42,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898520931] [2022-11-20 09:28:42,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898520931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:42,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137790503] [2022-11-20 09:28:42,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:28:42,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:42,666 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:42,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 09:28:42,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:28:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:42,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 09:28:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:28:42,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:28:43,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137790503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:43,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:43,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-20 09:28:43,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836945705] [2022-11-20 09:28:43,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:43,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:43,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:43,007 INFO L87 Difference]: Start difference. First operand 347 states and 475 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-11-20 09:28:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:43,776 INFO L93 Difference]: Finished difference Result 577 states and 777 transitions. [2022-11-20 09:28:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 30 [2022-11-20 09:28:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:43,779 INFO L225 Difference]: With dead ends: 577 [2022-11-20 09:28:43,779 INFO L226 Difference]: Without dead ends: 462 [2022-11-20 09:28:43,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:28:43,780 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:43,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 152 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-20 09:28:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 340. [2022-11-20 09:28:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3716814159292035) internal successors, (465), 339 states have internal predecessors, (465), 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) [2022-11-20 09:28:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 465 transitions. [2022-11-20 09:28:44,062 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 465 transitions. Word has length 30 [2022-11-20 09:28:44,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:44,063 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 465 transitions. [2022-11-20 09:28:44,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-11-20 09:28:44,063 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 465 transitions. [2022-11-20 09:28:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 09:28:44,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:44,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:44,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:44,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:44,266 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1329509959, now seen corresponding path program 6 times [2022-11-20 09:28:44,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:44,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809554947] [2022-11-20 09:28:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:44,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 09:28:44,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809554947] [2022-11-20 09:28:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809554947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544137003] [2022-11-20 09:28:44,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:28:44,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:44,547 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:44,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 09:28:44,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 09:28:44,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:44,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:28:44,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:28:44,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:28:44,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544137003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:44,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:44,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-11-20 09:28:44,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512980823] [2022-11-20 09:28:44,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:44,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:28:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:28:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:44,790 INFO L87 Difference]: Start difference. First operand 340 states and 465 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-11-20 09:28:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:46,256 INFO L93 Difference]: Finished difference Result 712 states and 937 transitions. [2022-11-20 09:28:46,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:28:46,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 30 [2022-11-20 09:28:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:46,260 INFO L225 Difference]: With dead ends: 712 [2022-11-20 09:28:46,260 INFO L226 Difference]: Without dead ends: 650 [2022-11-20 09:28:46,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:28:46,261 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:46,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 231 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:28:46,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-20 09:28:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 369. [2022-11-20 09:28:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.3423913043478262) internal successors, (494), 368 states have internal predecessors, (494), 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) [2022-11-20 09:28:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 494 transitions. [2022-11-20 09:28:46,537 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 494 transitions. Word has length 30 [2022-11-20 09:28:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:46,537 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 494 transitions. [2022-11-20 09:28:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-11-20 09:28:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 494 transitions. [2022-11-20 09:28:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 09:28:46,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:46,539 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:46,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:46,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:46,744 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1974452903, now seen corresponding path program 5 times [2022-11-20 09:28:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593498439] [2022-11-20 09:28:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 09:28:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:47,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593498439] [2022-11-20 09:28:47,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593498439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:47,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105014461] [2022-11-20 09:28:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:28:47,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:47,002 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:47,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 09:28:47,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 09:28:47,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:28:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 09:28:47,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 09:28:47,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105014461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:47,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:47,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2022-11-20 09:28:47,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892899185] [2022-11-20 09:28:47,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:47,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 09:28:47,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:47,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 09:28:47,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:28:47,556 INFO L87 Difference]: Start difference. First operand 369 states and 494 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) [2022-11-20 09:28:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:49,353 INFO L93 Difference]: Finished difference Result 555 states and 751 transitions. [2022-11-20 09:28:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 09:28:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) Word has length 30 [2022-11-20 09:28:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:49,357 INFO L225 Difference]: With dead ends: 555 [2022-11-20 09:28:49,357 INFO L226 Difference]: Without dead ends: 432 [2022-11-20 09:28:49,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 09:28:49,358 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:49,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 309 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:28:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-20 09:28:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 350. [2022-11-20 09:28:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.33810888252149) internal successors, (467), 349 states have internal predecessors, (467), 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) [2022-11-20 09:28:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 467 transitions. [2022-11-20 09:28:49,697 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 467 transitions. Word has length 30 [2022-11-20 09:28:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:49,697 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 467 transitions. [2022-11-20 09:28:49,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 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) [2022-11-20 09:28:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 467 transitions. [2022-11-20 09:28:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 09:28:49,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:49,699 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:49,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:49,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 09:28:49,904 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:49,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 8 times [2022-11-20 09:28:49,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:49,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499009173] [2022-11-20 09:28:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:49,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:50,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:50,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499009173] [2022-11-20 09:28:50,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499009173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:50,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053902446] [2022-11-20 09:28:50,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:50,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:50,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:50,295 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:50,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 09:28:50,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:50,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:28:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:28:50,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:28:50,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053902446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:50,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:50,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-20 09:28:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023405152] [2022-11-20 09:28:50,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:50,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:28:50,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:28:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:28:50,610 INFO L87 Difference]: Start difference. First operand 350 states and 467 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2022-11-20 09:29:16,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:16,706 INFO L93 Difference]: Finished difference Result 1250 states and 1586 transitions. [2022-11-20 09:29:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 235 states. [2022-11-20 09:29:16,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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 31 [2022-11-20 09:29:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:16,710 INFO L225 Difference]: With dead ends: 1250 [2022-11-20 09:29:16,710 INFO L226 Difference]: Without dead ends: 1170 [2022-11-20 09:29:16,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25149 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=3342, Invalid=57914, Unknown=0, NotChecked=0, Total=61256 [2022-11-20 09:29:16,717 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 673 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 3204 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 3204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:16,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 700 Invalid, 3581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 3204 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-20 09:29:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-20 09:29:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 409. [2022-11-20 09:29:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.3333333333333333) internal successors, (544), 408 states have internal predecessors, (544), 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) [2022-11-20 09:29:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 544 transitions. [2022-11-20 09:29:17,065 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 544 transitions. Word has length 31 [2022-11-20 09:29:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:17,065 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 544 transitions. [2022-11-20 09:29:17,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2022-11-20 09:29:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 544 transitions. [2022-11-20 09:29:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 09:29:17,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:17,067 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:17,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:17,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 09:29:17,273 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 2 times [2022-11-20 09:29:17,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:17,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184180246] [2022-11-20 09:29:17,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:17,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:29:17,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:17,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184180246] [2022-11-20 09:29:17,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184180246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:17,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001821679] [2022-11-20 09:29:17,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:17,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:17,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:17,573 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:17,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 09:29:17,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:29:17,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:29:17,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 09:29:17,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 09:29:17,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001821679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:17,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:17,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 25 [2022-11-20 09:29:17,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415763390] [2022-11-20 09:29:17,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:17,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 09:29:17,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:17,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 09:29:17,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:29:17,952 INFO L87 Difference]: Start difference. First operand 409 states and 544 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 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) [2022-11-20 09:29:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:19,495 INFO L93 Difference]: Finished difference Result 793 states and 1152 transitions. [2022-11-20 09:29:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 09:29:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 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 31 [2022-11-20 09:29:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:19,498 INFO L225 Difference]: With dead ends: 793 [2022-11-20 09:29:19,498 INFO L226 Difference]: Without dead ends: 688 [2022-11-20 09:29:19,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=294, Invalid=966, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 09:29:19,499 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 237 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:19,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 612 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:29:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-11-20 09:29:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 456. [2022-11-20 09:29:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3296703296703296) internal successors, (605), 455 states have internal predecessors, (605), 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) [2022-11-20 09:29:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 605 transitions. [2022-11-20 09:29:19,858 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 605 transitions. Word has length 31 [2022-11-20 09:29:19,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:19,858 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 605 transitions. [2022-11-20 09:29:19,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 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) [2022-11-20 09:29:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 605 transitions. [2022-11-20 09:29:19,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 09:29:19,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:19,859 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:19,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-20 09:29:20,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 09:29:20,060 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash 541073756, now seen corresponding path program 3 times [2022-11-20 09:29:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:20,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586564695] [2022-11-20 09:29:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 09:29:20,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:20,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586564695] [2022-11-20 09:29:20,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586564695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:20,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537436278] [2022-11-20 09:29:20,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:29:20,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:20,383 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:20,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 09:29:20,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:29:20,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:20,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:29:20,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 09:29:20,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 09:29:20,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537436278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:20,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:20,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 21 [2022-11-20 09:29:20,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151359563] [2022-11-20 09:29:20,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:20,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 09:29:20,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 09:29:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:29:20,618 INFO L87 Difference]: Start difference. First operand 456 states and 605 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2022-11-20 09:29:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:24,825 INFO L93 Difference]: Finished difference Result 834 states and 1179 transitions. [2022-11-20 09:29:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-20 09:29:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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 [2022-11-20 09:29:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:24,829 INFO L225 Difference]: With dead ends: 834 [2022-11-20 09:29:24,829 INFO L226 Difference]: Without dead ends: 636 [2022-11-20 09:29:24,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=784, Invalid=8918, Unknown=0, NotChecked=0, Total=9702 [2022-11-20 09:29:24,831 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 150 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:24,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 526 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 09:29:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-11-20 09:29:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 471. [2022-11-20 09:29:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.325531914893617) internal successors, (623), 470 states have internal predecessors, (623), 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) [2022-11-20 09:29:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 623 transitions. [2022-11-20 09:29:25,212 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 623 transitions. Word has length 33 [2022-11-20 09:29:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:25,212 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 623 transitions. [2022-11-20 09:29:25,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 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) [2022-11-20 09:29:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 623 transitions. [2022-11-20 09:29:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 09:29:25,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:25,214 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:25,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:25,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 09:29:25,420 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 6 times [2022-11-20 09:29:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:25,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409353604] [2022-11-20 09:29:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:25,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 09:29:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:25,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409353604] [2022-11-20 09:29:25,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409353604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:25,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263791766] [2022-11-20 09:29:25,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:29:25,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:25,772 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:25,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 09:29:25,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 09:29:25,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:29:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 09:29:26,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 09:29:26,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263791766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:26,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:26,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-11-20 09:29:26,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133906697] [2022-11-20 09:29:26,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:29:26,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:29:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:29:26,226 INFO L87 Difference]: Start difference. First operand 471 states and 623 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-11-20 09:29:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:50,301 INFO L93 Difference]: Finished difference Result 1586 states and 1925 transitions. [2022-11-20 09:29:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2022-11-20 09:29:50,301 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 34 [2022-11-20 09:29:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:50,304 INFO L225 Difference]: With dead ends: 1586 [2022-11-20 09:29:50,304 INFO L226 Difference]: Without dead ends: 1473 [2022-11-20 09:29:50,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25302 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=3464, Invalid=57792, Unknown=0, NotChecked=0, Total=61256 [2022-11-20 09:29:50,307 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 693 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:50,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 699 Invalid, 2854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2333 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-20 09:29:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-11-20 09:29:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 433. [2022-11-20 09:29:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.337962962962963) internal successors, (578), 432 states have internal predecessors, (578), 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) [2022-11-20 09:29:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 578 transitions. [2022-11-20 09:29:50,673 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 578 transitions. Word has length 34 [2022-11-20 09:29:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:50,673 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 578 transitions. [2022-11-20 09:29:50,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-11-20 09:29:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 578 transitions. [2022-11-20 09:29:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 09:29:50,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:50,675 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:50,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:50,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:50,881 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 9 times [2022-11-20 09:29:50,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:50,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397319817] [2022-11-20 09:29:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:50,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:51,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:51,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397319817] [2022-11-20 09:29:51,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397319817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:51,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59243347] [2022-11-20 09:29:51,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:29:51,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:51,349 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:51,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 09:29:51,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 09:29:51,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 09:29:51,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:51,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 09:29:52,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59243347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:52,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:52,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25, 17] total 43 [2022-11-20 09:29:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636814420] [2022-11-20 09:29:52,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:52,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 09:29:52,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 09:29:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1437, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 09:29:52,547 INFO L87 Difference]: Start difference. First operand 433 states and 578 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 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) [2022-11-20 09:30:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:03,290 INFO L93 Difference]: Finished difference Result 875 states and 1307 transitions. [2022-11-20 09:30:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-20 09:30:03,294 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 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 34 [2022-11-20 09:30:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:03,297 INFO L225 Difference]: With dead ends: 875 [2022-11-20 09:30:03,297 INFO L226 Difference]: Without dead ends: 790 [2022-11-20 09:30:03,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=4175, Invalid=13647, Unknown=0, NotChecked=0, Total=17822 [2022-11-20 09:30:03,300 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 634 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 784 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 3976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 784 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:03,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 707 Invalid, 3976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [784 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 09:30:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-20 09:30:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 510. [2022-11-20 09:30:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.343811394891945) internal successors, (684), 509 states have internal predecessors, (684), 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) [2022-11-20 09:30:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2022-11-20 09:30:03,887 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 34 [2022-11-20 09:30:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:03,888 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2022-11-20 09:30:03,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 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) [2022-11-20 09:30:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2022-11-20 09:30:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 09:30:03,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:03,890 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:03,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:04,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:04,096 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash -557084594, now seen corresponding path program 4 times [2022-11-20 09:30:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527095296] [2022-11-20 09:30:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:04,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 09:30:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:04,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527095296] [2022-11-20 09:30:04,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527095296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:04,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264395293] [2022-11-20 09:30:04,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:30:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:04,479 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:04,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 09:30:04,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:30:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 09:30:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:30:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 09:30:04,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264395293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:04,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:04,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 6] total 22 [2022-11-20 09:30:04,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787171150] [2022-11-20 09:30:04,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:04,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:30:04,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:30:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:30:04,805 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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) [2022-11-20 09:30:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:06,891 INFO L93 Difference]: Finished difference Result 971 states and 1415 transitions. [2022-11-20 09:30:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 09:30:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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 35 [2022-11-20 09:30:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:06,895 INFO L225 Difference]: With dead ends: 971 [2022-11-20 09:30:06,895 INFO L226 Difference]: Without dead ends: 860 [2022-11-20 09:30:06,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=321, Invalid=1011, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 09:30:06,896 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 267 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:06,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 776 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:30:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-20 09:30:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 586. [2022-11-20 09:30:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.34017094017094) internal successors, (784), 585 states have internal predecessors, (784), 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) [2022-11-20 09:30:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 784 transitions. [2022-11-20 09:30:07,425 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 784 transitions. Word has length 35 [2022-11-20 09:30:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:07,426 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 784 transitions. [2022-11-20 09:30:07,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 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) [2022-11-20 09:30:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 784 transitions. [2022-11-20 09:30:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 09:30:07,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:07,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:07,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-20 09:30:07,628 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2022-11-20 09:30:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:07,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507418818] [2022-11-20 09:30:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 09:30:07,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507418818] [2022-11-20 09:30:07,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507418818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993069756] [2022-11-20 09:30:07,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:30:07,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:07,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:07,982 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:08,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 09:30:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:08,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:30:08,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 09:30:08,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 09:30:08,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993069756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:08,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:08,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-11-20 09:30:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916757840] [2022-11-20 09:30:08,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:08,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:30:08,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:30:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:30:08,143 INFO L87 Difference]: Start difference. First operand 586 states and 784 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2022-11-20 09:30:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:09,643 INFO L93 Difference]: Finished difference Result 988 states and 1283 transitions. [2022-11-20 09:30:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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 36 [2022-11-20 09:30:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:09,647 INFO L225 Difference]: With dead ends: 988 [2022-11-20 09:30:09,647 INFO L226 Difference]: Without dead ends: 836 [2022-11-20 09:30:09,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:09,648 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:09,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 224 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:30:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-20 09:30:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 575. [2022-11-20 09:30:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.3379790940766552) internal successors, (768), 574 states have internal predecessors, (768), 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) [2022-11-20 09:30:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 768 transitions. [2022-11-20 09:30:10,196 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 768 transitions. Word has length 36 [2022-11-20 09:30:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:10,197 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 768 transitions. [2022-11-20 09:30:10,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 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) [2022-11-20 09:30:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 768 transitions. [2022-11-20 09:30:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 09:30:10,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:10,199 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:10,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:10,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 09:30:10,405 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash -922807928, now seen corresponding path program 8 times [2022-11-20 09:30:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:10,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899152140] [2022-11-20 09:30:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 09:30:10,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899152140] [2022-11-20 09:30:10,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899152140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:10,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324655070] [2022-11-20 09:30:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:10,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:10,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:10,746 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:10,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 09:30:10,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:10,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:30:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:10,943 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 09:30:10,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 09:30:11,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324655070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:11,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:11,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2022-11-20 09:30:11,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428062474] [2022-11-20 09:30:11,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:11,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:30:11,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:30:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:30:11,018 INFO L87 Difference]: Start difference. First operand 575 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-11-20 09:30:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:14,899 INFO L93 Difference]: Finished difference Result 1389 states and 1766 transitions. [2022-11-20 09:30:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 09:30:14,899 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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 36 [2022-11-20 09:30:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:14,903 INFO L225 Difference]: With dead ends: 1389 [2022-11-20 09:30:14,904 INFO L226 Difference]: Without dead ends: 1308 [2022-11-20 09:30:14,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-11-20 09:30:14,905 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 232 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:14,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 274 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:30:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-11-20 09:30:15,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 681. [2022-11-20 09:30:15,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3205882352941176) internal successors, (898), 680 states have internal predecessors, (898), 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) [2022-11-20 09:30:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 898 transitions. [2022-11-20 09:30:15,616 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 898 transitions. Word has length 36 [2022-11-20 09:30:15,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:15,617 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 898 transitions. [2022-11-20 09:30:15,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2022-11-20 09:30:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 898 transitions. [2022-11-20 09:30:15,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 09:30:15,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:15,619 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:15,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:15,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:15,824 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1662320984, now seen corresponding path program 10 times [2022-11-20 09:30:15,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:15,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954534008] [2022-11-20 09:30:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 09:30:16,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:16,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954534008] [2022-11-20 09:30:16,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954534008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:30:16,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172166362] [2022-11-20 09:30:16,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:30:16,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:16,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:16,196 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:16,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 09:30:16,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:30:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:16,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:30:16,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 09:30:16,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 09:30:16,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172166362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:16,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:30:16,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2022-11-20 09:30:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801713578] [2022-11-20 09:30:16,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:16,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 09:30:16,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 09:30:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:30:16,590 INFO L87 Difference]: Start difference. First operand 681 states and 898 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2022-11-20 09:31:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:04,072 INFO L93 Difference]: Finished difference Result 2059 states and 2502 transitions. [2022-11-20 09:31:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2022-11-20 09:31:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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 36 [2022-11-20 09:31:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:04,076 INFO L225 Difference]: With dead ends: 2059 [2022-11-20 09:31:04,076 INFO L226 Difference]: Without dead ends: 1926 [2022-11-20 09:31:04,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41456 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=5597, Invalid=92059, Unknown=0, NotChecked=0, Total=97656 [2022-11-20 09:31:04,080 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 721 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2532 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:04,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 688 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2532 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-20 09:31:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2022-11-20 09:31:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 659. [2022-11-20 09:31:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.3161094224924013) internal successors, (866), 658 states have internal predecessors, (866), 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) [2022-11-20 09:31:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 866 transitions. [2022-11-20 09:31:04,703 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 866 transitions. Word has length 36 [2022-11-20 09:31:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:04,704 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 866 transitions. [2022-11-20 09:31:04,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 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) [2022-11-20 09:31:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 866 transitions. [2022-11-20 09:31:04,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 09:31:04,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:04,706 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:04,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:04,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 09:31:04,911 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash -298016775, now seen corresponding path program 9 times [2022-11-20 09:31:04,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:04,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640772139] [2022-11-20 09:31:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:04,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 09:31:05,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:05,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640772139] [2022-11-20 09:31:05,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640772139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:05,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767800913] [2022-11-20 09:31:05,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:31:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:05,312 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:05,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 09:31:05,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:31:05,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:31:05,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-20 09:31:05,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-20 09:31:05,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767800913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:05,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:05,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 10] total 31 [2022-11-20 09:31:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146892067] [2022-11-20 09:31:05,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:05,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:31:05,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:05,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:31:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:31:05,866 INFO L87 Difference]: Start difference. First operand 659 states and 866 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2022-11-20 09:31:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:11,619 INFO L93 Difference]: Finished difference Result 1274 states and 1842 transitions. [2022-11-20 09:31:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-20 09:31:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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 36 [2022-11-20 09:31:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:11,622 INFO L225 Difference]: With dead ends: 1274 [2022-11-20 09:31:11,622 INFO L226 Difference]: Without dead ends: 1094 [2022-11-20 09:31:11,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3107 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1182, Invalid=10590, Unknown=0, NotChecked=0, Total=11772 [2022-11-20 09:31:11,623 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 391 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:11,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1008 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 2825 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 09:31:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-20 09:31:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 749. [2022-11-20 09:31:12,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.3181818181818181) internal successors, (986), 748 states have internal predecessors, (986), 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) [2022-11-20 09:31:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 986 transitions. [2022-11-20 09:31:12,328 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 986 transitions. Word has length 36 [2022-11-20 09:31:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:12,328 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 986 transitions. [2022-11-20 09:31:12,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2022-11-20 09:31:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 986 transitions. [2022-11-20 09:31:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 09:31:12,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:12,330 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:12,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 09:31:12,536 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 11 times [2022-11-20 09:31:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219686332] [2022-11-20 09:31:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:13,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:13,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219686332] [2022-11-20 09:31:13,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219686332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:13,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999268660] [2022-11-20 09:31:13,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:13,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:13,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:13,035 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:13,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 09:31:14,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 09:31:14,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:14,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 09:31:14,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:14,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 09:31:15,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999268660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:15,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:15,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 19] total 48 [2022-11-20 09:31:15,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504022758] [2022-11-20 09:31:15,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:15,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 09:31:15,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:15,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 09:31:15,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1805, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 09:31:15,309 INFO L87 Difference]: Start difference. First operand 749 states and 986 transitions. Second operand has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 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) [2022-11-20 09:31:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:30,354 INFO L93 Difference]: Finished difference Result 1427 states and 2032 transitions. [2022-11-20 09:31:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-20 09:31:30,355 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 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 [2022-11-20 09:31:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:30,359 INFO L225 Difference]: With dead ends: 1427 [2022-11-20 09:31:30,359 INFO L226 Difference]: Without dead ends: 1326 [2022-11-20 09:31:30,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8347 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=5634, Invalid=19172, Unknown=0, NotChecked=0, Total=24806 [2022-11-20 09:31:30,361 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 675 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 4612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:30,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 751 Invalid, 4612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 3711 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 09:31:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2022-11-20 09:31:31,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 813. [2022-11-20 09:31:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 1.3201970443349753) internal successors, (1072), 812 states have internal predecessors, (1072), 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) [2022-11-20 09:31:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1072 transitions. [2022-11-20 09:31:31,244 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1072 transitions. Word has length 37 [2022-11-20 09:31:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:31,244 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 1072 transitions. [2022-11-20 09:31:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 48 states have internal predecessors, (76), 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) [2022-11-20 09:31:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1072 transitions. [2022-11-20 09:31:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:31:31,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:31,246 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:31,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 09:31:31,452 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:31:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1382972419, now seen corresponding path program 7 times [2022-11-20 09:31:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:31,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890354683] [2022-11-20 09:31:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 09:31:31,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:31,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890354683] [2022-11-20 09:31:31,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890354683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:31,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183391147] [2022-11-20 09:31:31,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:31:31,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:31,909 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:31,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 09:31:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:31:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 09:31:32,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 09:31:32,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183391147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:32,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:32,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 28 [2022-11-20 09:31:32,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733253720] [2022-11-20 09:31:32,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:32,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:31:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:31:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:31:32,327 INFO L87 Difference]: Start difference. First operand 813 states and 1072 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2022-11-20 09:32:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:32,620 INFO L93 Difference]: Finished difference Result 2531 states and 3027 transitions. [2022-11-20 09:32:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 375 states. [2022-11-20 09:32:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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 39 [2022-11-20 09:32:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:32,624 INFO L225 Difference]: With dead ends: 2531 [2022-11-20 09:32:32,624 INFO L226 Difference]: Without dead ends: 2414 [2022-11-20 09:32:32,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63538 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=6773, Invalid=139533, Unknown=0, NotChecked=0, Total=146306 [2022-11-20 09:32:32,630 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 892 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 4212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:32,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 891 Invalid, 4212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-20 09:32:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2022-11-20 09:32:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 765. [2022-11-20 09:32:33,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 1.3193717277486912) internal successors, (1008), 764 states have internal predecessors, (1008), 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) [2022-11-20 09:32:33,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1008 transitions. [2022-11-20 09:32:33,557 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1008 transitions. Word has length 39 [2022-11-20 09:32:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:33,557 INFO L495 AbstractCegarLoop]: Abstraction has 765 states and 1008 transitions. [2022-11-20 09:32:33,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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) [2022-11-20 09:32:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1008 transitions. [2022-11-20 09:32:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:32:33,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:33,558 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:33,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:33,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 09:32:33,759 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:33,759 INFO L85 PathProgramCache]: Analyzing trace with hash 843702860, now seen corresponding path program 12 times [2022-11-20 09:32:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:33,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618435066] [2022-11-20 09:32:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:33,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 09:32:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:34,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618435066] [2022-11-20 09:32:34,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618435066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082032813] [2022-11-20 09:32:34,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:32:34,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:34,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:34,214 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:34,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 09:32:34,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-20 09:32:34,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:34,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:32:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 09:32:34,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 09:32:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082032813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:34,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:34,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2022-11-20 09:32:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965766336] [2022-11-20 09:32:34,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 09:32:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 09:32:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:32:34,834 INFO L87 Difference]: Start difference. First operand 765 states and 1008 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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) [2022-11-20 09:34:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:09,690 INFO L93 Difference]: Finished difference Result 2769 states and 3339 transitions. [2022-11-20 09:34:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 414 states. [2022-11-20 09:34:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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 39 [2022-11-20 09:34:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:09,695 INFO L225 Difference]: With dead ends: 2769 [2022-11-20 09:34:09,695 INFO L226 Difference]: Without dead ends: 2657 [2022-11-20 09:34:09,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78664 ImplicationChecksByTransitivity, 71.6s TimeCoverageRelationStatistics Valid=9243, Invalid=169263, Unknown=0, NotChecked=0, Total=178506 [2022-11-20 09:34:09,702 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1111 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 3102 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 3102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:09,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 827 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 3102 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2022-11-20 09:34:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2022-11-20 09:34:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 804. [2022-11-20 09:34:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.3175591531755915) internal successors, (1058), 803 states have internal predecessors, (1058), 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) [2022-11-20 09:34:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1058 transitions. [2022-11-20 09:34:10,752 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1058 transitions. Word has length 39 [2022-11-20 09:34:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:10,752 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 1058 transitions. [2022-11-20 09:34:10,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 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) [2022-11-20 09:34:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1058 transitions. [2022-11-20 09:34:10,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 09:34:10,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:10,754 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:10,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 09:34:10,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 09:34:10,960 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:34:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1969715723, now seen corresponding path program 10 times [2022-11-20 09:34:10,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409477224] [2022-11-20 09:34:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:10,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 09:34:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:11,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409477224] [2022-11-20 09:34:11,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409477224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41945537] [2022-11-20 09:34:11,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:11,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:11,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:11,447 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:11,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 09:34:11,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 09:34:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:34:11,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-20 09:34:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41945537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:11,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:11,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 6] total 25 [2022-11-20 09:34:11,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052466738] [2022-11-20 09:34:11,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:11,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 09:34:11,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 09:34:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:34:11,743 INFO L87 Difference]: Start difference. First operand 804 states and 1058 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 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) [2022-11-20 09:34:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:15,231 INFO L93 Difference]: Finished difference Result 1486 states and 2145 transitions. [2022-11-20 09:34:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 09:34:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 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 39 [2022-11-20 09:34:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:15,235 INFO L225 Difference]: With dead ends: 1486 [2022-11-20 09:34:15,236 INFO L226 Difference]: Without dead ends: 1316 [2022-11-20 09:34:15,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 09:34:15,237 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 360 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:15,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1235 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:34:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-11-20 09:34:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 869. [2022-11-20 09:34:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.314516129032258) internal successors, (1141), 868 states have internal predecessors, (1141), 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) [2022-11-20 09:34:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1141 transitions. [2022-11-20 09:34:16,273 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1141 transitions. Word has length 39 [2022-11-20 09:34:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:16,273 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1141 transitions. [2022-11-20 09:34:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 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) [2022-11-20 09:34:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1141 transitions. [2022-11-20 09:34:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 09:34:16,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:16,275 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:16,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-20 09:34:16,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 09:34:16,480 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:34:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1143634296, now seen corresponding path program 13 times [2022-11-20 09:34:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:16,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999526323] [2022-11-20 09:34:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:17,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999526323] [2022-11-20 09:34:17,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999526323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219423470] [2022-11-20 09:34:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:34:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:17,167 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:17,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 09:34:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:17,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 09:34:17,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 09:34:17,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-20 09:34:17,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219423470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:17,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:17,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2022-11-20 09:34:17,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862826093] [2022-11-20 09:34:17,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 09:34:17,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 09:34:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 09:34:17,691 INFO L87 Difference]: Start difference. First operand 869 states and 1141 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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) [2022-11-20 09:39:52,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:52,807 INFO L93 Difference]: Finished difference Result 3593 states and 4375 transitions. [2022-11-20 09:39:52,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 696 states. [2022-11-20 09:39:52,808 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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) Word has length 40 [2022-11-20 09:39:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:52,819 INFO L225 Difference]: With dead ends: 3593 [2022-11-20 09:39:52,819 INFO L226 Difference]: Without dead ends: 3470 [2022-11-20 09:39:52,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235354 ImplicationChecksByTransitivity, 282.7s TimeCoverageRelationStatistics Valid=18043, Invalid=492467, Unknown=0, NotChecked=0, Total=510510 [2022-11-20 09:39:52,848 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 2011 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 9336 mSolverCounterSat, 1736 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2011 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 11072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1736 IncrementalHoareTripleChecker+Valid, 9336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:52,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2011 Valid, 1188 Invalid, 11072 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1736 Valid, 9336 Invalid, 0 Unknown, 0 Unchecked, 34.0s Time] [2022-11-20 09:39:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2022-11-20 09:39:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 923. [2022-11-20 09:39:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.322125813449024) internal successors, (1219), 922 states have internal predecessors, (1219), 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) [2022-11-20 09:39:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1219 transitions. [2022-11-20 09:39:54,376 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1219 transitions. Word has length 40 [2022-11-20 09:39:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:54,376 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1219 transitions. [2022-11-20 09:39:54,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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) [2022-11-20 09:39:54,376 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1219 transitions. [2022-11-20 09:39:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 09:39:54,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:54,378 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:54,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:54,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:39:54,582 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:39:54,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1907019278, now seen corresponding path program 11 times [2022-11-20 09:39:54,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:39:54,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648557513] [2022-11-20 09:39:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:39:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:39:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:39:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 09:39:55,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:39:55,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648557513] [2022-11-20 09:39:55,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648557513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:39:55,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545456899] [2022-11-20 09:39:55,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:39:55,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:39:55,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:39:55,085 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:39:55,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 09:39:57,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 09:39:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:57,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 09:39:57,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:39:57,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-20 09:39:57,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545456899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:57,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:39:57,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 6] total 26 [2022-11-20 09:39:57,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62031420] [2022-11-20 09:39:57,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:57,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 09:39:57,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:39:57,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 09:39:57,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:39:57,531 INFO L87 Difference]: Start difference. First operand 923 states and 1219 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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) [2022-11-20 09:40:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:01,657 INFO L93 Difference]: Finished difference Result 1636 states and 2356 transitions. [2022-11-20 09:40:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 09:40:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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 [2022-11-20 09:40:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:01,662 INFO L225 Difference]: With dead ends: 1636 [2022-11-20 09:40:01,662 INFO L226 Difference]: Without dead ends: 1463 [2022-11-20 09:40:01,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=447, Invalid=1445, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 09:40:01,667 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 385 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:01,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1244 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 09:40:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2022-11-20 09:40:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 879. [2022-11-20 09:40:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.3405466970387243) internal successors, (1177), 878 states have internal predecessors, (1177), 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) [2022-11-20 09:40:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1177 transitions. [2022-11-20 09:40:03,039 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1177 transitions. Word has length 41 [2022-11-20 09:40:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:03,039 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1177 transitions. [2022-11-20 09:40:03,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 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) [2022-11-20 09:40:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1177 transitions. [2022-11-20 09:40:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 09:40:03,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:03,040 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:03,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:03,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 09:40:03,241 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:40:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:03,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2041166362, now seen corresponding path program 12 times [2022-11-20 09:40:03,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:40:03,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361100746] [2022-11-20 09:40:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:40:03,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:40:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:40:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 09:40:03,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:40:03,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361100746] [2022-11-20 09:40:03,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361100746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:40:03,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067665950] [2022-11-20 09:40:03,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:40:03,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:40:03,596 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:40:03,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 09:40:03,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 09:40:03,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 09:40:03,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 09:40:03,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 09:40:03,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067665950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:03,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:40:03,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-11-20 09:40:03,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437946211] [2022-11-20 09:40:03,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:03,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:40:03,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:40:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:40:03,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:40:03,812 INFO L87 Difference]: Start difference. First operand 879 states and 1177 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2022-11-20 09:40:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:08,747 INFO L93 Difference]: Finished difference Result 1619 states and 2078 transitions. [2022-11-20 09:40:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:40:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 42 [2022-11-20 09:40:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:08,756 INFO L225 Difference]: With dead ends: 1619 [2022-11-20 09:40:08,756 INFO L226 Difference]: Without dead ends: 1391 [2022-11-20 09:40:08,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:40:08,757 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:08,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 285 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:40:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-11-20 09:40:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 847. [2022-11-20 09:40:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.3486997635933806) internal successors, (1141), 846 states have internal predecessors, (1141), 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) [2022-11-20 09:40:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1141 transitions. [2022-11-20 09:40:10,168 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1141 transitions. Word has length 42 [2022-11-20 09:40:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:10,168 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1141 transitions. [2022-11-20 09:40:10,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2022-11-20 09:40:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1141 transitions. [2022-11-20 09:40:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 09:40:10,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:10,170 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:10,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:10,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:10,375 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:40:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:10,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1591776935, now seen corresponding path program 13 times [2022-11-20 09:40:10,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:40:10,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549567176] [2022-11-20 09:40:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:40:10,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:40:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:40:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 09:40:10,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:40:10,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549567176] [2022-11-20 09:40:10,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549567176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:40:10,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559025021] [2022-11-20 09:40:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:40:10,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:40:10,794 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:40:10,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 09:40:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:40:10,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 09:40:10,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 09:40:11,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 09:40:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559025021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:11,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:40:11,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2022-11-20 09:40:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333642761] [2022-11-20 09:40:11,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:11,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 09:40:11,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:40:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 09:40:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:40:11,081 INFO L87 Difference]: Start difference. First operand 847 states and 1141 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2022-11-20 09:40:12,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 09:40:15,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 09:40:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:26,678 INFO L93 Difference]: Finished difference Result 2338 states and 2907 transitions. [2022-11-20 09:40:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 09:40:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 42 [2022-11-20 09:40:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:26,682 INFO L225 Difference]: With dead ends: 2338 [2022-11-20 09:40:26,682 INFO L226 Difference]: Without dead ends: 2228 [2022-11-20 09:40:26,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=454, Invalid=1708, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 09:40:26,683 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 550 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:26,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 239 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-20 09:40:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2022-11-20 09:40:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 928. [2022-11-20 09:40:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.3419633225458467) internal successors, (1244), 927 states have internal predecessors, (1244), 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) [2022-11-20 09:40:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1244 transitions. [2022-11-20 09:40:28,191 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1244 transitions. Word has length 42 [2022-11-20 09:40:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:28,192 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1244 transitions. [2022-11-20 09:40:28,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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) [2022-11-20 09:40:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1244 transitions. [2022-11-20 09:40:28,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 09:40:28,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:28,194 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:28,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:28,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-20 09:40:28,399 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:40:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2003608313, now seen corresponding path program 8 times [2022-11-20 09:40:28,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:40:28,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821467069] [2022-11-20 09:40:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:40:28,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:40:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:40:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 09:40:28,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:40:28,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821467069] [2022-11-20 09:40:28,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821467069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:40:28,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190266671] [2022-11-20 09:40:28,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:40:28,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:28,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:40:28,883 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:40:28,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 09:40:28,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:40:28,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 09:40:28,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 09:40:29,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 09:40:29,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190266671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:29,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:40:29,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-11-20 09:40:29,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775904665] [2022-11-20 09:40:29,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:29,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 09:40:29,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:40:29,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 09:40:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:40:29,320 INFO L87 Difference]: Start difference. First operand 928 states and 1244 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 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) [2022-11-20 09:42:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:42:21,507 INFO L93 Difference]: Finished difference Result 3276 states and 3902 transitions. [2022-11-20 09:42:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 496 states. [2022-11-20 09:42:21,508 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 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 42 [2022-11-20 09:42:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:42:21,511 INFO L225 Difference]: With dead ends: 3276 [2022-11-20 09:42:21,511 INFO L226 Difference]: Without dead ends: 3121 [2022-11-20 09:42:21,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 503 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113191 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=10827, Invalid=243693, Unknown=0, NotChecked=0, Total=254520 [2022-11-20 09:42:21,520 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1106 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 5190 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 5881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 5190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:42:21,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1106 Valid, 1180 Invalid, 5881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 5190 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-11-20 09:42:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-11-20 09:42:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 892. [2022-11-20 09:42:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.3389450056116723) internal successors, (1193), 891 states have internal predecessors, (1193), 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) [2022-11-20 09:42:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1193 transitions. [2022-11-20 09:42:23,026 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1193 transitions. Word has length 42 [2022-11-20 09:42:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:42:23,027 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 1193 transitions. [2022-11-20 09:42:23,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 31 states have internal predecessors, (57), 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) [2022-11-20 09:42:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1193 transitions. [2022-11-20 09:42:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 09:42:23,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:42:23,028 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:42:23,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 09:42:23,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-20 09:42:23,229 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:42:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:42:23,229 INFO L85 PathProgramCache]: Analyzing trace with hash -844328665, now seen corresponding path program 5 times [2022-11-20 09:42:23,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:42:23,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030808118] [2022-11-20 09:42:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:42:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:42:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:42:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 09:42:23,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:42:23,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030808118] [2022-11-20 09:42:23,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030808118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:42:23,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551658284] [2022-11-20 09:42:23,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:42:23,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:42:23,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:42:23,758 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:42:23,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c372b294-aa13-4fe6-af30-9d7de80c4239/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 09:42:27,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 09:42:27,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:42:27,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 09:42:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:42:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:42:27,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:42:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-20 09:42:28,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551658284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:42:28,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:42:28,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 13] total 43 [2022-11-20 09:42:28,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481686771] [2022-11-20 09:42:28,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:42:28,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 09:42:28,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:42:28,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 09:42:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 09:42:28,267 INFO L87 Difference]: Start difference. First operand 892 states and 1193 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 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)