./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label44.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ --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 a251e8bd1fa18f71142ab77e725d3376cb9c86e0251b5d23fbb6f012a8340ced --- 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-dbf71c6-m [2022-10-17 10:23:08,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:23:08,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:23:08,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:23:08,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:23:08,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:23:08,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:23:08,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:23:08,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:23:08,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:23:08,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:23:08,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:23:08,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:23:08,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:23:08,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:23:08,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:23:08,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:23:08,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:23:08,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:23:08,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:23:08,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:23:08,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:23:08,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:23:08,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:23:08,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:23:08,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:23:08,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:23:08,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:23:08,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:23:08,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:23:08,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:23:08,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:23:08,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:23:08,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:23:08,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:23:08,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:23:08,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:23:08,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:23:08,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:23:08,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:23:08,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:23:08,998 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:23:09,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:23:09,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:23:09,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:23:09,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:23:09,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:23:09,044 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:23:09,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:23:09,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:23:09,045 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:23:09,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:23:09,046 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:23:09,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:23:09,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:23:09,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:23:09,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:23:09,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:23:09,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:23:09,048 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:23:09,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:23:09,048 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:23:09,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:23:09,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:23:09,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:23:09,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:23:09,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:23:09,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:23:09,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:23:09,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:23:09,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:23:09,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:23:09,052 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:23:09,052 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:23:09,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:23:09,053 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_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a251e8bd1fa18f71142ab77e725d3376cb9c86e0251b5d23fbb6f012a8340ced [2022-10-17 10:23:09,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:23:09,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:23:09,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:23:09,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:23:09,402 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:23:09,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/eca-rers2012/Problem14_label44.c [2022-10-17 10:23:09,475 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/data/fc03908cf/bc77822deb3d49e7a15778e1ee0627d5/FLAGeb80d0da7 [2022-10-17 10:23:10,165 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:23:10,165 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c [2022-10-17 10:23:10,178 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/data/fc03908cf/bc77822deb3d49e7a15778e1ee0627d5/FLAGeb80d0da7 [2022-10-17 10:23:10,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/data/fc03908cf/bc77822deb3d49e7a15778e1ee0627d5 [2022-10-17 10:23:10,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:23:10,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:23:10,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:23:10,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:23:10,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:23:10,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:23:10" (1/1) ... [2022-10-17 10:23:10,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dec5577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:10, skipping insertion in model container [2022-10-17 10:23:10,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:23:10" (1/1) ... [2022-10-17 10:23:10,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:23:10,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:23:10,689 WARN L230 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_01eaab16-3308-4011-bbd3-f66eea47616c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c[1450,1463] [2022-10-17 10:23:11,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:23:11,043 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:23:11,067 WARN L230 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_01eaab16-3308-4011-bbd3-f66eea47616c/sv-benchmarks/c/eca-rers2012/Problem14_label44.c[1450,1463] [2022-10-17 10:23:11,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:23:11,210 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:23:11,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11 WrapperNode [2022-10-17 10:23:11,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:23:11,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:23:11,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:23:11,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:23:11,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,245 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,339 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2022-10-17 10:23:11,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:23:11,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:23:11,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:23:11,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:23:11,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,450 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:23:11,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:23:11,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:23:11,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:23:11,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (1/1) ... [2022-10-17 10:23:11,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:23:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:11,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:23:11,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:23:11,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:23:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:23:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:23:11,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:23:11,682 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:23:11,684 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:23:13,218 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:23:13,229 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:23:13,229 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:23:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:23:13 BoogieIcfgContainer [2022-10-17 10:23:13,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:23:13,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:23:13,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:23:13,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:23:13,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:23:10" (1/3) ... [2022-10-17 10:23:13,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fed5b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:23:13, skipping insertion in model container [2022-10-17 10:23:13,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:23:11" (2/3) ... [2022-10-17 10:23:13,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fed5b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:23:13, skipping insertion in model container [2022-10-17 10:23:13,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:23:13" (3/3) ... [2022-10-17 10:23:13,242 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label44.c [2022-10-17 10:23:13,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:23:13,261 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:23:13,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:23:13,328 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;@6c21f896, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:23:13,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:23:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:23:13,342 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:13,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:13,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash -988188511, now seen corresponding path program 1 times [2022-10-17 10:23:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:13,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864493126] [2022-10-17 10:23:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:13,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:13,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864493126] [2022-10-17 10:23:13,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864493126] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:13,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:13,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:23:13,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102948654] [2022-10-17 10:23:13,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:13,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:13,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:13,609 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:14,623 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2022-10-17 10:23:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-17 10:23:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:14,642 INFO L225 Difference]: With dead ends: 669 [2022-10-17 10:23:14,642 INFO L226 Difference]: Without dead ends: 360 [2022-10-17 10:23:14,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:14,650 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 195 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:14,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 77 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 10:23:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-10-17 10:23:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-10-17 10:23:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.6378830083565459) internal successors, (588), 359 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 588 transitions. [2022-10-17 10:23:14,714 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 588 transitions. Word has length 11 [2022-10-17 10:23:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:14,715 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 588 transitions. [2022-10-17 10:23:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 588 transitions. [2022-10-17 10:23:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-17 10:23:14,718 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:14,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:14,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:23:14,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash 682578220, now seen corresponding path program 1 times [2022-10-17 10:23:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:14,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261327403] [2022-10-17 10:23:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:14,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261327403] [2022-10-17 10:23:15,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261327403] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:15,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:15,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:23:15,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904979990] [2022-10-17 10:23:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:15,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:15,010 INFO L87 Difference]: Start difference. First operand 360 states and 588 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2022-10-17 10:23:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:15,782 INFO L93 Difference]: Finished difference Result 1074 states and 1759 transitions. [2022-10-17 10:23:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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 76 [2022-10-17 10:23:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:15,788 INFO L225 Difference]: With dead ends: 1074 [2022-10-17 10:23:15,788 INFO L226 Difference]: Without dead ends: 716 [2022-10-17 10:23:15,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:15,792 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:15,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 89 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 10:23:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-10-17 10:23:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 538. [2022-10-17 10:23:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.4934823091247673) internal successors, (802), 537 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 802 transitions. [2022-10-17 10:23:15,825 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 802 transitions. Word has length 76 [2022-10-17 10:23:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:15,826 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 802 transitions. [2022-10-17 10:23:15,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 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) [2022-10-17 10:23:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 802 transitions. [2022-10-17 10:23:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-10-17 10:23:15,830 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:15,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:15,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:23:15,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:15,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:15,831 INFO L85 PathProgramCache]: Analyzing trace with hash 137006575, now seen corresponding path program 1 times [2022-10-17 10:23:15,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:15,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784371845] [2022-10-17 10:23:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:15,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:16,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784371845] [2022-10-17 10:23:16,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784371845] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:16,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:16,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:16,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137285482] [2022-10-17 10:23:16,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:16,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:23:16,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:16,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:23:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:23:16,343 INFO L87 Difference]: Start difference. First operand 538 states and 802 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:17,454 INFO L93 Difference]: Finished difference Result 1430 states and 2030 transitions. [2022-10-17 10:23:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:23:17,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-10-17 10:23:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:17,460 INFO L225 Difference]: With dead ends: 1430 [2022-10-17 10:23:17,460 INFO L226 Difference]: Without dead ends: 894 [2022-10-17 10:23:17,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:17,463 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 418 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:17,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 121 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 10:23:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-10-17 10:23:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 894. [2022-10-17 10:23:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 1.3370660694288914) internal successors, (1194), 893 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1194 transitions. [2022-10-17 10:23:17,491 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1194 transitions. Word has length 90 [2022-10-17 10:23:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:17,492 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 1194 transitions. [2022-10-17 10:23:17,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1194 transitions. [2022-10-17 10:23:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-10-17 10:23:17,499 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:17,500 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:23:17,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash -218227972, now seen corresponding path program 1 times [2022-10-17 10:23:17,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:17,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410421261] [2022-10-17 10:23:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:17,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:17,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410421261] [2022-10-17 10:23:17,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410421261] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:17,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:17,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:17,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527068438] [2022-10-17 10:23:17,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:17,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:23:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:23:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:23:17,788 INFO L87 Difference]: Start difference. First operand 894 states and 1194 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:18,612 INFO L93 Difference]: Finished difference Result 1993 states and 2629 transitions. [2022-10-17 10:23:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:23:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2022-10-17 10:23:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:18,619 INFO L225 Difference]: With dead ends: 1993 [2022-10-17 10:23:18,619 INFO L226 Difference]: Without dead ends: 1072 [2022-10-17 10:23:18,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:23:18,622 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 104 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:18,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 121 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:23:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-10-17 10:23:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2022-10-17 10:23:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.1802054154995332) internal successors, (1264), 1071 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1264 transitions. [2022-10-17 10:23:18,650 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1264 transitions. Word has length 170 [2022-10-17 10:23:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:18,651 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1264 transitions. [2022-10-17 10:23:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1264 transitions. [2022-10-17 10:23:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-10-17 10:23:18,654 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:18,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:18,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:23:18,654 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:18,655 INFO L85 PathProgramCache]: Analyzing trace with hash 906921856, now seen corresponding path program 1 times [2022-10-17 10:23:18,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:18,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010199392] [2022-10-17 10:23:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:18,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:19,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:19,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010199392] [2022-10-17 10:23:19,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010199392] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:23:19,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577122449] [2022-10-17 10:23:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:19,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:19,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:19,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:23:19,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:23:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:23:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:23:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-10-17 10:23:19,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:23:19,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577122449] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:19,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:23:19,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-10-17 10:23:19,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037675182] [2022-10-17 10:23:19,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:19,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:19,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:23:19,334 INFO L87 Difference]: Start difference. First operand 1072 states and 1264 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:19,992 INFO L93 Difference]: Finished difference Result 2498 states and 3033 transitions. [2022-10-17 10:23:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:19,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 182 [2022-10-17 10:23:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:20,001 INFO L225 Difference]: With dead ends: 2498 [2022-10-17 10:23:20,001 INFO L226 Difference]: Without dead ends: 1428 [2022-10-17 10:23:20,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:23:20,004 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 172 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:20,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 85 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:23:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-10-17 10:23:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1072. [2022-10-17 10:23:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.1802054154995332) internal successors, (1264), 1071 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1264 transitions. [2022-10-17 10:23:20,034 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1264 transitions. Word has length 182 [2022-10-17 10:23:20,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:20,035 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1264 transitions. [2022-10-17 10:23:20,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:20,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1264 transitions. [2022-10-17 10:23:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-10-17 10:23:20,038 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:20,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:20,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:23:20,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:20,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:20,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:20,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1839664871, now seen corresponding path program 1 times [2022-10-17 10:23:20,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:20,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655997454] [2022-10-17 10:23:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:20,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:23:20,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:20,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655997454] [2022-10-17 10:23:20,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655997454] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:20,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:20,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:20,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382974524] [2022-10-17 10:23:20,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:20,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:20,622 INFO L87 Difference]: Start difference. First operand 1072 states and 1264 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:21,217 INFO L93 Difference]: Finished difference Result 2676 states and 3213 transitions. [2022-10-17 10:23:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2022-10-17 10:23:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:21,227 INFO L225 Difference]: With dead ends: 2676 [2022-10-17 10:23:21,227 INFO L226 Difference]: Without dead ends: 1606 [2022-10-17 10:23:21,229 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 [2022-10-17 10:23:21,233 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:21,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 58 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:23:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-10-17 10:23:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1428. [2022-10-17 10:23:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.156271899088998) internal successors, (1650), 1427 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1650 transitions. [2022-10-17 10:23:21,272 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1650 transitions. Word has length 185 [2022-10-17 10:23:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:21,273 INFO L495 AbstractCegarLoop]: Abstraction has 1428 states and 1650 transitions. [2022-10-17 10:23:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1650 transitions. [2022-10-17 10:23:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-10-17 10:23:21,278 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:21,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:21,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:23:21,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash -823699052, now seen corresponding path program 1 times [2022-10-17 10:23:21,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613998270] [2022-10-17 10:23:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:21,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 81 proven. 130 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-10-17 10:23:21,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613998270] [2022-10-17 10:23:21,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613998270] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:23:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755782948] [2022-10-17 10:23:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:21,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:21,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:23:21,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:23:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:23:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:23:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-10-17 10:23:22,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:23:22,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755782948] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:22,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:23:22,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-10-17 10:23:22,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42953882] [2022-10-17 10:23:22,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:22,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:22,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:23:22,382 INFO L87 Difference]: Start difference. First operand 1428 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 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) [2022-10-17 10:23:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:22,958 INFO L93 Difference]: Finished difference Result 3210 states and 3788 transitions. [2022-10-17 10:23:22,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:22,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 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) Word has length 304 [2022-10-17 10:23:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:22,970 INFO L225 Difference]: With dead ends: 3210 [2022-10-17 10:23:22,970 INFO L226 Difference]: Without dead ends: 1962 [2022-10-17 10:23:22,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:23:22,975 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:22,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 47 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:23:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-10-17 10:23:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784. [2022-10-17 10:23:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.1402131239484015) internal successors, (2033), 1783 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2033 transitions. [2022-10-17 10:23:23,023 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2033 transitions. Word has length 304 [2022-10-17 10:23:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:23,024 INFO L495 AbstractCegarLoop]: Abstraction has 1784 states and 2033 transitions. [2022-10-17 10:23:23,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 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) [2022-10-17 10:23:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2033 transitions. [2022-10-17 10:23:23,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-10-17 10:23:23,031 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:23,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:23,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:23:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:23,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 574386753, now seen corresponding path program 1 times [2022-10-17 10:23:23,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:23,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455959565] [2022-10-17 10:23:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-10-17 10:23:23,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455959565] [2022-10-17 10:23:23,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455959565] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:23,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:23,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:23,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959336515] [2022-10-17 10:23:23,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:23,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:23:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:23:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:23:23,752 INFO L87 Difference]: Start difference. First operand 1784 states and 2033 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:24,469 INFO L93 Difference]: Finished difference Result 3595 states and 4116 transitions. [2022-10-17 10:23:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:23:24,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 381 [2022-10-17 10:23:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:24,481 INFO L225 Difference]: With dead ends: 3595 [2022-10-17 10:23:24,481 INFO L226 Difference]: Without dead ends: 1962 [2022-10-17 10:23:24,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:23:24,484 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:24,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 17 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 10:23:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-10-17 10:23:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1784. [2022-10-17 10:23:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.089736399326977) internal successors, (1943), 1783 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 1943 transitions. [2022-10-17 10:23:24,536 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 1943 transitions. Word has length 381 [2022-10-17 10:23:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:24,536 INFO L495 AbstractCegarLoop]: Abstraction has 1784 states and 1943 transitions. [2022-10-17 10:23:24,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 1943 transitions. [2022-10-17 10:23:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-10-17 10:23:24,544 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:24,545 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:23:24,546 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2137769198, now seen corresponding path program 1 times [2022-10-17 10:23:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:24,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217396052] [2022-10-17 10:23:24,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:24,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-10-17 10:23:25,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217396052] [2022-10-17 10:23:25,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217396052] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:25,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:25,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826576919] [2022-10-17 10:23:25,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:25,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:25,101 INFO L87 Difference]: Start difference. First operand 1784 states and 1943 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:25,669 INFO L93 Difference]: Finished difference Result 4100 states and 4527 transitions. [2022-10-17 10:23:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 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 404 [2022-10-17 10:23:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:25,682 INFO L225 Difference]: With dead ends: 4100 [2022-10-17 10:23:25,682 INFO L226 Difference]: Without dead ends: 2496 [2022-10-17 10:23:25,684 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 [2022-10-17 10:23:25,688 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:25,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 202 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:23:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-10-17 10:23:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2496. [2022-10-17 10:23:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 1.092184368737475) internal successors, (2725), 2495 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 2725 transitions. [2022-10-17 10:23:25,754 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 2725 transitions. Word has length 404 [2022-10-17 10:23:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:25,755 INFO L495 AbstractCegarLoop]: Abstraction has 2496 states and 2725 transitions. [2022-10-17 10:23:25,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 2725 transitions. [2022-10-17 10:23:25,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-10-17 10:23:25,764 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:25,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:25,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:23:25,765 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1913592377, now seen corresponding path program 1 times [2022-10-17 10:23:25,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:25,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562437955] [2022-10-17 10:23:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-10-17 10:23:26,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:26,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562437955] [2022-10-17 10:23:26,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562437955] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:26,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:26,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:26,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664201909] [2022-10-17 10:23:26,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:26,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:26,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:26,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:26,145 INFO L87 Difference]: Start difference. First operand 2496 states and 2725 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:26,816 INFO L93 Difference]: Finished difference Result 6058 states and 6693 transitions. [2022-10-17 10:23:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 445 [2022-10-17 10:23:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:26,834 INFO L225 Difference]: With dead ends: 6058 [2022-10-17 10:23:26,834 INFO L226 Difference]: Without dead ends: 3742 [2022-10-17 10:23:26,838 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 [2022-10-17 10:23:26,839 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:26,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:23:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2022-10-17 10:23:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3742. [2022-10-17 10:23:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 1.0828655439722) internal successors, (4051), 3741 states have internal predecessors, (4051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 4051 transitions. [2022-10-17 10:23:26,936 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 4051 transitions. Word has length 445 [2022-10-17 10:23:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:26,937 INFO L495 AbstractCegarLoop]: Abstraction has 3742 states and 4051 transitions. [2022-10-17 10:23:26,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 4051 transitions. [2022-10-17 10:23:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2022-10-17 10:23:26,948 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:26,948 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:26,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:23:26,949 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:26,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:26,950 INFO L85 PathProgramCache]: Analyzing trace with hash -417947467, now seen corresponding path program 1 times [2022-10-17 10:23:26,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:26,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883010839] [2022-10-17 10:23:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:26,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-10-17 10:23:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883010839] [2022-10-17 10:23:27,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883010839] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:27,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:27,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816509872] [2022-10-17 10:23:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:27,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:27,620 INFO L87 Difference]: Start difference. First operand 3742 states and 4051 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:28,179 INFO L93 Difference]: Finished difference Result 7304 states and 7921 transitions. [2022-10-17 10:23:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:28,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 481 [2022-10-17 10:23:28,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:28,197 INFO L225 Difference]: With dead ends: 7304 [2022-10-17 10:23:28,197 INFO L226 Difference]: Without dead ends: 3742 [2022-10-17 10:23:28,201 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 [2022-10-17 10:23:28,202 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 103 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:28,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 242 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:23:28,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2022-10-17 10:23:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3208. [2022-10-17 10:23:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.078578110383536) internal successors, (3459), 3207 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3459 transitions. [2022-10-17 10:23:28,279 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3459 transitions. Word has length 481 [2022-10-17 10:23:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:28,280 INFO L495 AbstractCegarLoop]: Abstraction has 3208 states and 3459 transitions. [2022-10-17 10:23:28,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3459 transitions. [2022-10-17 10:23:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2022-10-17 10:23:28,285 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:28,286 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:23:28,286 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:28,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1993168899, now seen corresponding path program 1 times [2022-10-17 10:23:28,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:28,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194278467] [2022-10-17 10:23:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:28,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 687 proven. 110 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-10-17 10:23:28,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194278467] [2022-10-17 10:23:28,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194278467] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:23:28,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057925289] [2022-10-17 10:23:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:28,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:28,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:28,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:23:28,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:23:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:23:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:23:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1067 trivial. 0 not checked. [2022-10-17 10:23:29,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:23:29,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057925289] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:29,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:23:29,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 10:23:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980115338] [2022-10-17 10:23:29,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:29,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:29,198 INFO L87 Difference]: Start difference. First operand 3208 states and 3459 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:29,745 INFO L93 Difference]: Finished difference Result 7126 states and 7684 transitions. [2022-10-17 10:23:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 600 [2022-10-17 10:23:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:29,763 INFO L225 Difference]: With dead ends: 7126 [2022-10-17 10:23:29,763 INFO L226 Difference]: Without dead ends: 3386 [2022-10-17 10:23:29,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:29,768 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 170 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:29,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 241 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:23:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-10-17 10:23:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3208. [2022-10-17 10:23:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.073277206111631) internal successors, (3442), 3207 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:29,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3442 transitions. [2022-10-17 10:23:29,849 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3442 transitions. Word has length 600 [2022-10-17 10:23:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:29,850 INFO L495 AbstractCegarLoop]: Abstraction has 3208 states and 3442 transitions. [2022-10-17 10:23:29,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3442 transitions. [2022-10-17 10:23:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 680 [2022-10-17 10:23:29,857 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:29,857 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:29,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:23:30,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:30,076 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash 170968653, now seen corresponding path program 1 times [2022-10-17 10:23:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:30,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697343843] [2022-10-17 10:23:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:30,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 1081 proven. 110 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-10-17 10:23:30,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697343843] [2022-10-17 10:23:30,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697343843] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:23:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436776868] [2022-10-17 10:23:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:30,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:30,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:30,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:23:30,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:23:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 10:23:31,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:23:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 1461 trivial. 0 not checked. [2022-10-17 10:23:31,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:23:31,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436776868] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:31,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:23:31,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 10:23:31,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168077530] [2022-10-17 10:23:31,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:31,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:31,049 INFO L87 Difference]: Start difference. First operand 3208 states and 3442 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:31,545 INFO L93 Difference]: Finished difference Result 6592 states and 7086 transitions. [2022-10-17 10:23:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 679 [2022-10-17 10:23:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:31,562 INFO L225 Difference]: With dead ends: 6592 [2022-10-17 10:23:31,563 INFO L226 Difference]: Without dead ends: 3386 [2022-10-17 10:23:31,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:23:31,567 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 170 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:31,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 236 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:23:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-10-17 10:23:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3208. [2022-10-17 10:23:31,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.0673526660430308) internal successors, (3423), 3207 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:31,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 3423 transitions. [2022-10-17 10:23:31,637 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 3423 transitions. Word has length 679 [2022-10-17 10:23:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:31,639 INFO L495 AbstractCegarLoop]: Abstraction has 3208 states and 3423 transitions. [2022-10-17 10:23:31,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 3423 transitions. [2022-10-17 10:23:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2022-10-17 10:23:31,645 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:31,646 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:31,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:23:31,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:31,860 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:31,861 INFO L85 PathProgramCache]: Analyzing trace with hash -35560533, now seen corresponding path program 1 times [2022-10-17 10:23:31,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:31,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319077230] [2022-10-17 10:23:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 1141 proven. 110 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-10-17 10:23:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319077230] [2022-10-17 10:23:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319077230] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:23:32,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585619971] [2022-10-17 10:23:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:32,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:23:32,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:23:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:23:32,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:23:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 1141 proven. 110 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-10-17 10:23:33,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:23:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 1141 proven. 110 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-10-17 10:23:33,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585619971] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:23:33,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:23:33,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-10-17 10:23:33,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138412014] [2022-10-17 10:23:33,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:23:33,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:23:33,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:23:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:23:33,553 INFO L87 Difference]: Start difference. First operand 3208 states and 3423 transitions. Second operand has 6 states, 6 states have (on average 123.5) internal successors, (741), 6 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:34,597 INFO L93 Difference]: Finished difference Result 7482 states and 7997 transitions. [2022-10-17 10:23:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:23:34,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 123.5) internal successors, (741), 6 states have internal predecessors, (741), 0 states have call successors, (0), 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 691 [2022-10-17 10:23:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:34,637 INFO L225 Difference]: With dead ends: 7482 [2022-10-17 10:23:34,637 INFO L226 Difference]: Without dead ends: 4632 [2022-10-17 10:23:34,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1384 GetRequests, 1380 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:23:34,642 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 275 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:34,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 54 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 10:23:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2022-10-17 10:23:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3920. [2022-10-17 10:23:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 1.064302117887216) internal successors, (4171), 3919 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4171 transitions. [2022-10-17 10:23:34,762 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 4171 transitions. Word has length 691 [2022-10-17 10:23:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:34,763 INFO L495 AbstractCegarLoop]: Abstraction has 3920 states and 4171 transitions. [2022-10-17 10:23:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.5) internal successors, (741), 6 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 4171 transitions. [2022-10-17 10:23:34,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2022-10-17 10:23:34,770 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:34,771 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:34,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:23:34,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 10:23:34,988 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1198680525, now seen corresponding path program 1 times [2022-10-17 10:23:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246962738] [2022-10-17 10:23:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 976 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-10-17 10:23:36,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:36,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246962738] [2022-10-17 10:23:36,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246962738] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:23:36,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:23:36,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:23:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703440893] [2022-10-17 10:23:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:23:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:23:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:23:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:23:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:23:36,096 INFO L87 Difference]: Start difference. First operand 3920 states and 4171 transitions. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:23:36,604 INFO L93 Difference]: Finished difference Result 8550 states and 9189 transitions. [2022-10-17 10:23:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:23:36,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 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 739 [2022-10-17 10:23:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:23:36,615 INFO L225 Difference]: With dead ends: 8550 [2022-10-17 10:23:36,615 INFO L226 Difference]: Without dead ends: 4988 [2022-10-17 10:23:36,620 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 [2022-10-17 10:23:36,620 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 21 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:23:36,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 218 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:23:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2022-10-17 10:23:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 4810. [2022-10-17 10:23:36,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 1.0609274277396548) internal successors, (5102), 4809 states have internal predecessors, (5102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 5102 transitions. [2022-10-17 10:23:36,757 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 5102 transitions. Word has length 739 [2022-10-17 10:23:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:23:36,758 INFO L495 AbstractCegarLoop]: Abstraction has 4810 states and 5102 transitions. [2022-10-17 10:23:36,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:23:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 5102 transitions. [2022-10-17 10:23:36,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2022-10-17 10:23:36,775 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:23:36,776 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:23:36,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:23:36,776 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:23:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:23:36,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1446635334, now seen corresponding path program 1 times [2022-10-17 10:23:36,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:23:36,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991834139] [2022-10-17 10:23:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:23:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1109 proven. 93 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2022-10-17 10:23:37,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:23:37,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991834139] [2022-10-17 10:23:37,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991834139] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:23:37,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816998757] [2022-10-17 10:23:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:23:37,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:23:37,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:23:37,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:23:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01eaab16-3308-4011-bbd3-f66eea47616c/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:23:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:23:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:23:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates...