./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y --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 e6db237e0e3a7433c307944ca0a7f57b3986dfc7d27b25cb31c2bd3c24bb8b17 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:37:45,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:37:45,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:37:45,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:37:45,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:37:45,952 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:37:45,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:37:45,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:37:45,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:37:45,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:37:45,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:37:45,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:37:45,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:37:45,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:37:45,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:37:45,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:37:45,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:37:45,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:37:45,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:37:45,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:37:46,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:37:46,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:37:46,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:37:46,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:37:46,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:37:46,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:37:46,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:37:46,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:37:46,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:37:46,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:37:46,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:37:46,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:37:46,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:37:46,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:37:46,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:37:46,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:37:46,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:37:46,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:37:46,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:37:46,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:37:46,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:37:46,029 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:37:46,080 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:37:46,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:37:46,081 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:37:46,081 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:37:46,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:37:46,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:37:46,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:37:46,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:37:46,090 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:37:46,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:37:46,092 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:37:46,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:37:46,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:37:46,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:37:46,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:37:46,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:37:46,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:37:46,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:37:46,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:37:46,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:37:46,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:37:46,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:37:46,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:37:46,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:37:46,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:37:46,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:37:46,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:37:46,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:37:46,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:37:46,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:37:46,098 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:37:46,099 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:37:46,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:37:46,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:37:46,100 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_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6db237e0e3a7433c307944ca0a7f57b3986dfc7d27b25cb31c2bd3c24bb8b17 [2021-11-13 18:37:46,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:37:46,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:37:46,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:37:46,399 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:37:46,400 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:37:46,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem13_label55.c [2021-11-13 18:37:46,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/data/e52ed355d/c1b18470e93144a2a011b858047bc1ea/FLAG4f67c0eb1 [2021-11-13 18:37:47,343 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:37:47,344 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/sv-benchmarks/c/eca-rers2012/Problem13_label55.c [2021-11-13 18:37:47,380 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/data/e52ed355d/c1b18470e93144a2a011b858047bc1ea/FLAG4f67c0eb1 [2021-11-13 18:37:47,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/data/e52ed355d/c1b18470e93144a2a011b858047bc1ea [2021-11-13 18:37:47,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:37:47,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:37:47,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:37:47,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:37:47,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:37:47,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:37:47" (1/1) ... [2021-11-13 18:37:47,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1434a99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:47, skipping insertion in model container [2021-11-13 18:37:47,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:37:47" (1/1) ... [2021-11-13 18:37:47,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:37:47,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:37:48,330 WARN L228 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_ca1c1471-ab24-49cf-92e6-1430f4782843/sv-benchmarks/c/eca-rers2012/Problem13_label55.c[6865,6878] [2021-11-13 18:37:49,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:37:49,533 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:37:49,569 WARN L228 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_ca1c1471-ab24-49cf-92e6-1430f4782843/sv-benchmarks/c/eca-rers2012/Problem13_label55.c[6865,6878] [2021-11-13 18:37:50,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:37:50,295 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:37:50,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50 WrapperNode [2021-11-13 18:37:50,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:37:50,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:37:50,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:37:50,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:37:50,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:50,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:51,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:37:51,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:37:51,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:37:51,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:37:51,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:51,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:51,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:51,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:51,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:52,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:52,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:52,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:37:52,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:37:52,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:37:52,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:37:52,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (1/1) ... [2021-11-13 18:37:52,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:37:52,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:37:52,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:37:52,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:37:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:37:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:37:52,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:37:52,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:37:58,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:37:58,526 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:37:58,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:37:58 BoogieIcfgContainer [2021-11-13 18:37:58,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:37:58,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:37:58,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:37:58,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:37:58,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:37:47" (1/3) ... [2021-11-13 18:37:58,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27099bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:37:58, skipping insertion in model container [2021-11-13 18:37:58,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:37:50" (2/3) ... [2021-11-13 18:37:58,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27099bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:37:58, skipping insertion in model container [2021-11-13 18:37:58,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:37:58" (3/3) ... [2021-11-13 18:37:58,540 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label55.c [2021-11-13 18:37:58,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:37:58,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:37:58,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:37:58,611 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:37:58,611 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:37:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:37:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:37:58,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:37:58,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:37:58,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:37:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:37:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash 563919826, now seen corresponding path program 1 times [2021-11-13 18:37:58,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:37:58,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123572022] [2021-11-13 18:37:58,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:37:58,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:37:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:37:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:37:58,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:37:58,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123572022] [2021-11-13 18:37:58,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123572022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:37:58,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:37:58,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:37:58,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918068048] [2021-11-13 18:37:58,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:37:58,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:37:58,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:37:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:37:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:37:59,037 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:04,635 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-11-13 18:38:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-13 18:38:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:04,669 INFO L225 Difference]: With dead ends: 3160 [2021-11-13 18:38:04,669 INFO L226 Difference]: Without dead ends: 1983 [2021-11-13 18:38:04,679 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:04,689 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1055 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4462.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.35ms SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5360.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:04,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 37.35ms Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 5360.53ms Time] [2021-11-13 18:38:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-11-13 18:38:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-11-13 18:38:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-11-13 18:38:04,834 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 48 [2021-11-13 18:38:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:04,835 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-11-13 18:38:04,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-11-13 18:38:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 18:38:04,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:04,841 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:38:04,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:38:04,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1310025926, now seen corresponding path program 1 times [2021-11-13 18:38:04,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:04,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246444641] [2021-11-13 18:38:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:04,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:04,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:05,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246444641] [2021-11-13 18:38:05,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246444641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:05,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:05,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:38:05,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27097310] [2021-11-13 18:38:05,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:05,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:05,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:05,004 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:09,401 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2021-11-13 18:38:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-13 18:38:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:09,425 INFO L225 Difference]: With dead ends: 5456 [2021-11-13 18:38:09,425 INFO L226 Difference]: Without dead ends: 3528 [2021-11-13 18:38:09,429 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:09,430 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3603.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.11ms SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4238.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:09,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 27.11ms Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 4238.18ms Time] [2021-11-13 18:38:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-11-13 18:38:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2021-11-13 18:38:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2021-11-13 18:38:09,527 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 113 [2021-11-13 18:38:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:09,528 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2021-11-13 18:38:09,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2021-11-13 18:38:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:38:09,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:09,532 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:38:09,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:38:09,533 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash -882854965, now seen corresponding path program 1 times [2021-11-13 18:38:09,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:09,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423376107] [2021-11-13 18:38:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:09,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:09,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:09,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423376107] [2021-11-13 18:38:09,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423376107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:09,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:09,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:38:09,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559340755] [2021-11-13 18:38:09,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:09,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:09,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:09,638 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:13,509 INFO L93 Difference]: Finished difference Result 10234 states and 16098 transitions. [2021-11-13 18:38:13,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:13,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-13 18:38:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:13,581 INFO L225 Difference]: With dead ends: 10234 [2021-11-13 18:38:13,581 INFO L226 Difference]: Without dead ends: 6710 [2021-11-13 18:38:13,585 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:13,587 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 973 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3105.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.00ms SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3744.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:13,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 852 Invalid, 3309 Unknown, 0 Unchecked, 17.00ms Time], IncrementalHoareTripleChecker [774 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 3744.03ms Time] [2021-11-13 18:38:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-11-13 18:38:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 6700. [2021-11-13 18:38:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2021-11-13 18:38:13,785 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 119 [2021-11-13 18:38:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:13,788 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2021-11-13 18:38:13,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2021-11-13 18:38:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-13 18:38:13,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:13,795 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:13,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:38:13,796 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:13,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1721511264, now seen corresponding path program 1 times [2021-11-13 18:38:13,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:13,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565718675] [2021-11-13 18:38:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:13,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:13,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:13,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565718675] [2021-11-13 18:38:13,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565718675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:13,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:13,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:38:13,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324376126] [2021-11-13 18:38:13,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:13,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:13,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:13,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:13,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:13,959 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:18,635 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2021-11-13 18:38:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2021-11-13 18:38:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:18,701 INFO L225 Difference]: With dead ends: 17443 [2021-11-13 18:38:18,702 INFO L226 Difference]: Without dead ends: 10745 [2021-11-13 18:38:18,712 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:18,714 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3762.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.82ms SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4492.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:18,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 12.82ms Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 4492.10ms Time] [2021-11-13 18:38:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-11-13 18:38:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2021-11-13 18:38:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2021-11-13 18:38:18,981 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 149 [2021-11-13 18:38:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:18,984 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2021-11-13 18:38:18,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:18,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2021-11-13 18:38:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-13 18:38:18,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:18,987 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:18,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:38:18,988 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash -990477209, now seen corresponding path program 1 times [2021-11-13 18:38:18,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:18,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614592694] [2021-11-13 18:38:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:18,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:19,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:19,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614592694] [2021-11-13 18:38:19,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614592694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:19,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:19,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:38:19,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14039062] [2021-11-13 18:38:19,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:19,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:19,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:19,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:19,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:19,300 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:22,329 INFO L93 Difference]: Finished difference Result 20549 states and 28119 transitions. [2021-11-13 18:38:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 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 159 [2021-11-13 18:38:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:22,374 INFO L225 Difference]: With dead ends: 20549 [2021-11-13 18:38:22,374 INFO L226 Difference]: Without dead ends: 10669 [2021-11-13 18:38:22,387 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:22,388 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2427.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.35ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2916.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:22,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 6.35ms Time], IncrementalHoareTripleChecker [24 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2916.26ms Time] [2021-11-13 18:38:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2021-11-13 18:38:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10669. [2021-11-13 18:38:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3539557555305586) internal successors, (14444), 10668 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14444 transitions. [2021-11-13 18:38:22,597 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14444 transitions. Word has length 159 [2021-11-13 18:38:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:22,598 INFO L470 AbstractCegarLoop]: Abstraction has 10669 states and 14444 transitions. [2021-11-13 18:38:22,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14444 transitions. [2021-11-13 18:38:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-13 18:38:22,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:22,601 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:22,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:38:22,602 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:22,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1328975421, now seen corresponding path program 1 times [2021-11-13 18:38:22,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:22,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473761510] [2021-11-13 18:38:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:22,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:22,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:22,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473761510] [2021-11-13 18:38:22,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473761510] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:22,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560801740] [2021-11-13 18:38:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:22,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:22,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:22,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:22,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:38:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:38:23,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-13 18:38:23,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:38:23,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560801740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:23,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:38:23,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-13 18:38:23,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312174125] [2021-11-13 18:38:23,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:23,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:23,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:38:23,569 INFO L87 Difference]: Start difference. First operand 10669 states and 14444 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:27,231 INFO L93 Difference]: Finished difference Result 30031 states and 41217 transitions. [2021-11-13 18:38:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 173 [2021-11-13 18:38:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:27,271 INFO L225 Difference]: With dead ends: 30031 [2021-11-13 18:38:27,271 INFO L226 Difference]: Without dead ends: 20151 [2021-11-13 18:38:27,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:38:27,287 INFO L933 BasicCegarLoop]: 1071 mSDtfsCounter, 736 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2884.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 3306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.67ms SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3502.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:27,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 1221 Invalid, 3306 Unknown, 0 Unchecked, 8.67ms Time], IncrementalHoareTripleChecker [779 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 3502.35ms Time] [2021-11-13 18:38:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-11-13 18:38:27,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 19337. [2021-11-13 18:38:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19336 states have (on average 1.24244931733554) internal successors, (24024), 19336 states have internal predecessors, (24024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 24024 transitions. [2021-11-13 18:38:27,701 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 24024 transitions. Word has length 173 [2021-11-13 18:38:27,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:27,702 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 24024 transitions. [2021-11-13 18:38:27,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 24024 transitions. [2021-11-13 18:38:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-13 18:38:27,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:27,709 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-13 18:38:27,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:38:27,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:27,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash -471469257, now seen corresponding path program 1 times [2021-11-13 18:38:27,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:27,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126635949] [2021-11-13 18:38:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:27,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-11-13 18:38:28,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:28,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126635949] [2021-11-13 18:38:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126635949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:28,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:28,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:38:28,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504073168] [2021-11-13 18:38:28,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:28,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:28,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:28,150 INFO L87 Difference]: Start difference. First operand 19337 states and 24024 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:31,948 INFO L93 Difference]: Finished difference Result 44991 states and 55629 transitions. [2021-11-13 18:38:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 260 [2021-11-13 18:38:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:32,033 INFO L225 Difference]: With dead ends: 44991 [2021-11-13 18:38:32,033 INFO L226 Difference]: Without dead ends: 26443 [2021-11-13 18:38:32,055 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:32,056 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 730 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3011.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.97ms SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3603.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:32,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1214 Invalid, 2895 Unknown, 0 Unchecked, 8.97ms Time], IncrementalHoareTripleChecker [180 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 3603.55ms Time] [2021-11-13 18:38:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26443 states. [2021-11-13 18:38:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26443 to 26434. [2021-11-13 18:38:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26434 states, 26433 states have (on average 1.2007339310710097) internal successors, (31739), 26433 states have internal predecessors, (31739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26434 states to 26434 states and 31739 transitions. [2021-11-13 18:38:32,453 INFO L78 Accepts]: Start accepts. Automaton has 26434 states and 31739 transitions. Word has length 260 [2021-11-13 18:38:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:32,453 INFO L470 AbstractCegarLoop]: Abstraction has 26434 states and 31739 transitions. [2021-11-13 18:38:32,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 26434 states and 31739 transitions. [2021-11-13 18:38:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-13 18:38:32,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:32,459 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-13 18:38:32,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:38:32,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:32,461 INFO L85 PathProgramCache]: Analyzing trace with hash -553029773, now seen corresponding path program 1 times [2021-11-13 18:38:32,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:32,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325255585] [2021-11-13 18:38:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:32,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:32,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:32,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325255585] [2021-11-13 18:38:32,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325255585] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:32,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:32,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:38:32,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577567068] [2021-11-13 18:38:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:32,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:32,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:32,573 INFO L87 Difference]: Start difference. First operand 26434 states and 31739 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:37,093 INFO L93 Difference]: Finished difference Result 72535 states and 87982 transitions. [2021-11-13 18:38:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:37,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 262 [2021-11-13 18:38:37,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:37,199 INFO L225 Difference]: With dead ends: 72535 [2021-11-13 18:38:37,200 INFO L226 Difference]: Without dead ends: 46890 [2021-11-13 18:38:37,229 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:37,232 INFO L933 BasicCegarLoop]: 1848 mSDtfsCounter, 841 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3480.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.99ms SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4190.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:37,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 1984 Invalid, 3285 Unknown, 0 Unchecked, 12.99ms Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 4190.37ms Time] [2021-11-13 18:38:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46890 states. [2021-11-13 18:38:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46890 to 44520. [2021-11-13 18:38:37,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44520 states, 44519 states have (on average 1.1663110132752308) internal successors, (51923), 44519 states have internal predecessors, (51923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44520 states to 44520 states and 51923 transitions. [2021-11-13 18:38:37,973 INFO L78 Accepts]: Start accepts. Automaton has 44520 states and 51923 transitions. Word has length 262 [2021-11-13 18:38:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:37,974 INFO L470 AbstractCegarLoop]: Abstraction has 44520 states and 51923 transitions. [2021-11-13 18:38:37,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 44520 states and 51923 transitions. [2021-11-13 18:38:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-13 18:38:37,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:37,981 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-13 18:38:37,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:38:37,981 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:37,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1260619545, now seen corresponding path program 1 times [2021-11-13 18:38:37,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:37,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589239064] [2021-11-13 18:38:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:37,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:38:38,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:38,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589239064] [2021-11-13 18:38:38,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589239064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:38,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:38,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:38:38,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199911911] [2021-11-13 18:38:38,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:38,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:38,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:38:38,119 INFO L87 Difference]: Start difference. First operand 44520 states and 51923 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:43,331 INFO L93 Difference]: Finished difference Result 107938 states and 128050 transitions. [2021-11-13 18:38:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:38:43,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 275 [2021-11-13 18:38:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:43,422 INFO L225 Difference]: With dead ends: 107938 [2021-11-13 18:38:43,423 INFO L226 Difference]: Without dead ends: 63420 [2021-11-13 18:38:43,455 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:43,456 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 823 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3945.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.57ms SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4701.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:43,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 930 Invalid, 3285 Unknown, 0 Unchecked, 15.57ms Time], IncrementalHoareTripleChecker [900 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 4701.85ms Time] [2021-11-13 18:38:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63420 states. [2021-11-13 18:38:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63420 to 61048. [2021-11-13 18:38:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61048 states, 61047 states have (on average 1.161056235359641) internal successors, (70879), 61047 states have internal predecessors, (70879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61048 states to 61048 states and 70879 transitions. [2021-11-13 18:38:44,855 INFO L78 Accepts]: Start accepts. Automaton has 61048 states and 70879 transitions. Word has length 275 [2021-11-13 18:38:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:44,856 INFO L470 AbstractCegarLoop]: Abstraction has 61048 states and 70879 transitions. [2021-11-13 18:38:44,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 61048 states and 70879 transitions. [2021-11-13 18:38:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-13 18:38:44,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:44,884 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:38:44,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:38:44,885 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1042265292, now seen corresponding path program 1 times [2021-11-13 18:38:44,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:44,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196430737] [2021-11-13 18:38:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:44,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 367 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:38:45,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:45,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196430737] [2021-11-13 18:38:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196430737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:45,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:38:45,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:38:45,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241327887] [2021-11-13 18:38:45,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:45,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:38:45,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:45,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:38:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:38:45,052 INFO L87 Difference]: Start difference. First operand 61048 states and 70879 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:38:53,886 INFO L93 Difference]: Finished difference Result 160082 states and 186762 transitions. [2021-11-13 18:38:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:38:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 336 [2021-11-13 18:38:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:38:54,016 INFO L225 Difference]: With dead ends: 160082 [2021-11-13 18:38:54,016 INFO L226 Difference]: Without dead ends: 99823 [2021-11-13 18:38:54,196 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:38:54,197 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 1701 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6252 mSolverCounterSat, 996 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6769.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 7248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.09ms SdHoareTripleChecker+Time, 996 IncrementalHoareTripleChecker+Valid, 6252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8122.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:38:54,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1701 Valid, 1057 Invalid, 7248 Unknown, 0 Unchecked, 34.09ms Time], IncrementalHoareTripleChecker [996 Valid, 6252 Invalid, 0 Unknown, 0 Unchecked, 8122.62ms Time] [2021-11-13 18:38:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99823 states. [2021-11-13 18:38:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99823 to 76803. [2021-11-13 18:38:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76803 states, 76802 states have (on average 1.146454519413557) internal successors, (88050), 76802 states have internal predecessors, (88050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76803 states to 76803 states and 88050 transitions. [2021-11-13 18:38:55,698 INFO L78 Accepts]: Start accepts. Automaton has 76803 states and 88050 transitions. Word has length 336 [2021-11-13 18:38:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:38:55,699 INFO L470 AbstractCegarLoop]: Abstraction has 76803 states and 88050 transitions. [2021-11-13 18:38:55,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:38:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 76803 states and 88050 transitions. [2021-11-13 18:38:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-13 18:38:55,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:38:55,723 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-13 18:38:55,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:38:55,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:38:55,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:38:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2072974517, now seen corresponding path program 1 times [2021-11-13 18:38:55,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:38:55,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347173637] [2021-11-13 18:38:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:55,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:38:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 220 proven. 113 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:38:56,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:38:56,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347173637] [2021-11-13 18:38:56,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347173637] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:38:56,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622853550] [2021-11-13 18:38:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:38:56,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:38:56,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:38:56,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:38:56,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:38:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:38:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:38:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:38:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-13 18:38:57,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:38:57,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622853550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:38:57,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:38:57,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-13 18:38:57,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332913359] [2021-11-13 18:38:57,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:38:57,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:38:57,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:38:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:38:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:38:57,568 INFO L87 Difference]: Start difference. First operand 76803 states and 88050 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:02,071 INFO L93 Difference]: Finished difference Result 152806 states and 175296 transitions. [2021-11-13 18:39:02,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:02,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 354 [2021-11-13 18:39:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:02,152 INFO L225 Difference]: With dead ends: 152806 [2021-11-13 18:39:02,153 INFO L226 Difference]: Without dead ends: 76792 [2021-11-13 18:39:02,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:39:02,176 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 1073 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3214.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.22ms SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3864.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:02,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1073 Valid, 814 Invalid, 2920 Unknown, 0 Unchecked, 15.22ms Time], IncrementalHoareTripleChecker [532 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 3864.01ms Time] [2021-11-13 18:39:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76792 states. [2021-11-13 18:39:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76792 to 76789. [2021-11-13 18:39:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76789 states, 76788 states have (on average 1.1087409491066313) internal successors, (85138), 76788 states have internal predecessors, (85138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76789 states to 76789 states and 85138 transitions. [2021-11-13 18:39:03,296 INFO L78 Accepts]: Start accepts. Automaton has 76789 states and 85138 transitions. Word has length 354 [2021-11-13 18:39:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:03,297 INFO L470 AbstractCegarLoop]: Abstraction has 76789 states and 85138 transitions. [2021-11-13 18:39:03,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 76789 states and 85138 transitions. [2021-11-13 18:39:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2021-11-13 18:39:03,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:03,305 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:03,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:03,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:39:03,531 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash -992590703, now seen corresponding path program 1 times [2021-11-13 18:39:03,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:03,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639726527] [2021-11-13 18:39:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:03,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 314 proven. 113 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:39:03,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:03,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639726527] [2021-11-13 18:39:03,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639726527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:03,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613443237] [2021-11-13 18:39:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:03,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:03,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:03,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:03,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:39:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:39:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:04,887 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-11-13 18:39:04,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:39:04,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613443237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:39:04,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:39:04,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-13 18:39:04,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071542670] [2021-11-13 18:39:04,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:39:04,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:39:04,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:04,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:39:04,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:39:04,890 INFO L87 Difference]: Start difference. First operand 76789 states and 85138 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:08,696 INFO L93 Difference]: Finished difference Result 155129 states and 172596 transitions. [2021-11-13 18:39:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:08,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 403 [2021-11-13 18:39:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:08,785 INFO L225 Difference]: With dead ends: 155129 [2021-11-13 18:39:08,786 INFO L226 Difference]: Without dead ends: 90946 [2021-11-13 18:39:08,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:39:08,807 INFO L933 BasicCegarLoop]: 1729 mSDtfsCounter, 856 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2711.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.08ms SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3246.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:08,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 1858 Invalid, 2852 Unknown, 0 Unchecked, 10.08ms Time], IncrementalHoareTripleChecker [464 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 3246.19ms Time] [2021-11-13 18:39:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90946 states. [2021-11-13 18:39:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90946 to 82281. [2021-11-13 18:39:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82281 states, 82280 states have (on average 1.104691298006806) internal successors, (90894), 82280 states have internal predecessors, (90894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82281 states to 82281 states and 90894 transitions. [2021-11-13 18:39:09,830 INFO L78 Accepts]: Start accepts. Automaton has 82281 states and 90894 transitions. Word has length 403 [2021-11-13 18:39:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:09,831 INFO L470 AbstractCegarLoop]: Abstraction has 82281 states and 90894 transitions. [2021-11-13 18:39:09,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 82281 states and 90894 transitions. [2021-11-13 18:39:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-11-13 18:39:09,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:09,845 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:09,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:10,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:39:10,060 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 85106610, now seen corresponding path program 1 times [2021-11-13 18:39:10,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:10,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276459221] [2021-11-13 18:39:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:10,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 329 proven. 113 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:39:10,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:10,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276459221] [2021-11-13 18:39:10,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276459221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:10,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195677612] [2021-11-13 18:39:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:10,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:10,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:10,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:10,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:39:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:10,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:39:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 375 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-13 18:39:11,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:39:11,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195677612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:39:11,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:39:11,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-13 18:39:11,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93258591] [2021-11-13 18:39:11,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:39:11,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:39:11,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:39:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:39:11,595 INFO L87 Difference]: Start difference. First operand 82281 states and 90894 transitions. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:15,593 INFO L93 Difference]: Finished difference Result 162969 states and 182107 transitions. [2021-11-13 18:39:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 478 [2021-11-13 18:39:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:15,680 INFO L225 Difference]: With dead ends: 162969 [2021-11-13 18:39:15,680 INFO L226 Difference]: Without dead ends: 93294 [2021-11-13 18:39:15,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:39:15,708 INFO L933 BasicCegarLoop]: 386 mSDtfsCounter, 1135 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2952.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.10ms SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3534.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:15,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 401 Invalid, 3439 Unknown, 0 Unchecked, 9.10ms Time], IncrementalHoareTripleChecker [1173 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 3534.55ms Time] [2021-11-13 18:39:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93294 states. [2021-11-13 18:39:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93294 to 90933. [2021-11-13 18:39:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90933 states, 90932 states have (on average 1.107222979809088) internal successors, (100682), 90932 states have internal predecessors, (100682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90933 states to 90933 states and 100682 transitions. [2021-11-13 18:39:16,994 INFO L78 Accepts]: Start accepts. Automaton has 90933 states and 100682 transitions. Word has length 478 [2021-11-13 18:39:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:16,995 INFO L470 AbstractCegarLoop]: Abstraction has 90933 states and 100682 transitions. [2021-11-13 18:39:16,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 90933 states and 100682 transitions. [2021-11-13 18:39:17,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2021-11-13 18:39:17,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:17,005 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:17,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-13 18:39:17,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:17,208 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1674027507, now seen corresponding path program 1 times [2021-11-13 18:39:17,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:17,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493900406] [2021-11-13 18:39:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:17,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-13 18:39:17,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:17,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493900406] [2021-11-13 18:39:17,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493900406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:39:17,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:39:17,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:39:17,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368287851] [2021-11-13 18:39:17,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:39:17,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:39:17,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:39:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:39:17,433 INFO L87 Difference]: Start difference. First operand 90933 states and 100682 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:21,933 INFO L93 Difference]: Finished difference Result 207049 states and 230591 transitions. [2021-11-13 18:39:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 492 [2021-11-13 18:39:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:22,075 INFO L225 Difference]: With dead ends: 207049 [2021-11-13 18:39:22,075 INFO L226 Difference]: Without dead ends: 116905 [2021-11-13 18:39:22,110 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:39:22,111 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 797 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2843.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.67ms SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3670.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:22,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 888 Invalid, 3310 Unknown, 0 Unchecked, 9.67ms Time], IncrementalHoareTripleChecker [886 Valid, 2424 Invalid, 0 Unknown, 0 Unchecked, 3670.35ms Time] [2021-11-13 18:39:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116905 states. [2021-11-13 18:39:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116905 to 113741. [2021-11-13 18:39:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113741 states, 113740 states have (on average 1.1038860559170036) internal successors, (125556), 113740 states have internal predecessors, (125556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113741 states to 113741 states and 125556 transitions. [2021-11-13 18:39:23,524 INFO L78 Accepts]: Start accepts. Automaton has 113741 states and 125556 transitions. Word has length 492 [2021-11-13 18:39:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:23,525 INFO L470 AbstractCegarLoop]: Abstraction has 113741 states and 125556 transitions. [2021-11-13 18:39:23,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:23,525 INFO L276 IsEmpty]: Start isEmpty. Operand 113741 states and 125556 transitions. [2021-11-13 18:39:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-11-13 18:39:23,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:23,539 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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] [2021-11-13 18:39:23,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:39:23,539 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1047411024, now seen corresponding path program 1 times [2021-11-13 18:39:23,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:23,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272815857] [2021-11-13 18:39:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:23,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-13 18:39:24,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:24,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272815857] [2021-11-13 18:39:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272815857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:39:24,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:39:24,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:39:24,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859496333] [2021-11-13 18:39:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:39:24,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:39:24,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:39:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:39:24,266 INFO L87 Difference]: Start difference. First operand 113741 states and 125556 transitions. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:28,564 INFO L93 Difference]: Finished difference Result 252666 states and 279848 transitions. [2021-11-13 18:39:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:28,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 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 496 [2021-11-13 18:39:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:28,705 INFO L225 Difference]: With dead ends: 252666 [2021-11-13 18:39:28,705 INFO L226 Difference]: Without dead ends: 137351 [2021-11-13 18:39:28,742 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:39:28,743 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 727 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2809.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 3159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.19ms SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3373.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:28,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 1837 Invalid, 3159 Unknown, 0 Unchecked, 10.19ms Time], IncrementalHoareTripleChecker [672 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 3373.46ms Time] [2021-11-13 18:39:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137351 states. [2021-11-13 18:39:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137351 to 136550. [2021-11-13 18:39:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136550 states, 136549 states have (on average 1.0868479446938462) internal successors, (148408), 136549 states have internal predecessors, (148408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136550 states to 136550 states and 148408 transitions. [2021-11-13 18:39:30,622 INFO L78 Accepts]: Start accepts. Automaton has 136550 states and 148408 transitions. Word has length 496 [2021-11-13 18:39:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:30,623 INFO L470 AbstractCegarLoop]: Abstraction has 136550 states and 148408 transitions. [2021-11-13 18:39:30,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 136550 states and 148408 transitions. [2021-11-13 18:39:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2021-11-13 18:39:30,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:30,645 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:30,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:39:30,646 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1333503994, now seen corresponding path program 1 times [2021-11-13 18:39:30,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:30,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4933796] [2021-11-13 18:39:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:30,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 395 proven. 110 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:39:31,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:31,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4933796] [2021-11-13 18:39:31,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4933796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:39:31,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698222674] [2021-11-13 18:39:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:31,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:31,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:39:31,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:39:31,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:39:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:31,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:39:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:39:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 427 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-13 18:39:32,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:39:32,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698222674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:39:32,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:39:32,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-13 18:39:32,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719821495] [2021-11-13 18:39:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:39:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:39:32,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:39:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:39:32,324 INFO L87 Difference]: Start difference. First operand 136550 states and 148408 transitions. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:37,013 INFO L93 Difference]: Finished difference Result 272312 states and 296000 transitions. [2021-11-13 18:39:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:37,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 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 576 [2021-11-13 18:39:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:37,195 INFO L225 Difference]: With dead ends: 272312 [2021-11-13 18:39:37,195 INFO L226 Difference]: Without dead ends: 136551 [2021-11-13 18:39:37,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:39:37,249 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 634 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2439 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3093.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 3038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.32ms SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3644.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:37,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 1802 Invalid, 3038 Unknown, 0 Unchecked, 9.32ms Time], IncrementalHoareTripleChecker [599 Valid, 2439 Invalid, 0 Unknown, 0 Unchecked, 3644.12ms Time] [2021-11-13 18:39:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136551 states. [2021-11-13 18:39:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136551 to 133395. [2021-11-13 18:39:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133395 states, 133394 states have (on average 1.0681215047153545) internal successors, (142481), 133394 states have internal predecessors, (142481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133395 states to 133395 states and 142481 transitions. [2021-11-13 18:39:39,223 INFO L78 Accepts]: Start accepts. Automaton has 133395 states and 142481 transitions. Word has length 576 [2021-11-13 18:39:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:39,224 INFO L470 AbstractCegarLoop]: Abstraction has 133395 states and 142481 transitions. [2021-11-13 18:39:39,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 133395 states and 142481 transitions. [2021-11-13 18:39:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2021-11-13 18:39:39,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:39,257 INFO L514 BasicCegarLoop]: trace histogram [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, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:39,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:39:39,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca1c1471-ab24-49cf-92e6-1430f4782843/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:39:39,484 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash 61934450, now seen corresponding path program 1 times [2021-11-13 18:39:39,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:39,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802049167] [2021-11-13 18:39:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:39,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1070 backedges. 863 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 18:39:39,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:39,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802049167] [2021-11-13 18:39:39,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802049167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:39:39,721 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:39:39,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:39:39,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506841990] [2021-11-13 18:39:39,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:39:39,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:39:39,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:39:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:39:39,724 INFO L87 Difference]: Start difference. First operand 133395 states and 142481 transitions. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:44,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:44,117 INFO L93 Difference]: Finished difference Result 269157 states and 287367 transitions. [2021-11-13 18:39:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:44,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 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 588 [2021-11-13 18:39:44,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:44,252 INFO L225 Difference]: With dead ends: 269157 [2021-11-13 18:39:44,253 INFO L226 Difference]: Without dead ends: 136551 [2021-11-13 18:39:44,286 INFO L932 BasicCegarLoop]: 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 [2021-11-13 18:39:44,286 INFO L933 BasicCegarLoop]: 1358 mSDtfsCounter, 926 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3106.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.71ms SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3644.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:44,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 1436 Invalid, 3029 Unknown, 0 Unchecked, 11.71ms Time], IncrementalHoareTripleChecker [579 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 3644.90ms Time] [2021-11-13 18:39:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136551 states. [2021-11-13 18:39:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136551 to 134178. [2021-11-13 18:39:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134178 states, 134177 states have (on average 1.0547038613175135) internal successors, (141517), 134177 states have internal predecessors, (141517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134178 states to 134178 states and 141517 transitions. [2021-11-13 18:39:45,835 INFO L78 Accepts]: Start accepts. Automaton has 134178 states and 141517 transitions. Word has length 588 [2021-11-13 18:39:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:39:45,835 INFO L470 AbstractCegarLoop]: Abstraction has 134178 states and 141517 transitions. [2021-11-13 18:39:45,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 134178 states and 141517 transitions. [2021-11-13 18:39:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-11-13 18:39:45,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:39:45,860 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:39:45,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:39:45,861 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:39:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:39:45,861 INFO L85 PathProgramCache]: Analyzing trace with hash 148778459, now seen corresponding path program 1 times [2021-11-13 18:39:45,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:39:45,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034161326] [2021-11-13 18:39:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:39:45,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:39:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:39:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 496 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-13 18:39:46,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:39:46,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034161326] [2021-11-13 18:39:46,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034161326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:39:46,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:39:46,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:39:46,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195358501] [2021-11-13 18:39:46,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:39:46,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:39:46,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:39:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:39:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:39:46,846 INFO L87 Difference]: Start difference. First operand 134178 states and 141517 transitions. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:39:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:39:50,833 INFO L93 Difference]: Finished difference Result 266779 states and 281339 transitions. [2021-11-13 18:39:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:39:50,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 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 601 [2021-11-13 18:39:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:39:50,974 INFO L225 Difference]: With dead ends: 266779 [2021-11-13 18:39:50,974 INFO L226 Difference]: Without dead ends: 133390 [2021-11-13 18:39:51,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:39:51,014 INFO L933 BasicCegarLoop]: 1310 mSDtfsCounter, 945 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 2403 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2791.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.38ms SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 2403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3287.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:39:51,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 1384 Invalid, 2835 Unknown, 0 Unchecked, 9.38ms Time], IncrementalHoareTripleChecker [432 Valid, 2403 Invalid, 0 Unknown, 0 Unchecked, 3287.27ms Time] [2021-11-13 18:39:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133390 states.