./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_szymanski.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_szymanski.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU --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 8c5cb1d1ec86f1df708ae47d652aad74925d4eb7bf3fc3a2c37d76896a5071e8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:47:57,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:47:57,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:47:57,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:47:57,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:47:57,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:47:57,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:47:57,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:47:57,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:47:57,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:47:57,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:47:57,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:47:57,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:47:57,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:47:57,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:47:57,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:47:57,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:47:57,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:47:57,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:47:57,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:47:57,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:47:57,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:47:57,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:47:57,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:47:57,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:47:57,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:47:57,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:47:57,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:47:57,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:47:57,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:47:57,941 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:47:57,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:47:57,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:47:57,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:47:57,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:47:57,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:47:57,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:47:57,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:47:57,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:47:57,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:47:57,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:47:57,954 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:47:58,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:47:58,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:47:58,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:47:58,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:47:58,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:47:58,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:47:58,025 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:47:58,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:47:58,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:47:58,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:47:58,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:47:58,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:47:58,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:47:58,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:47:58,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:47:58,029 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:47:58,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:47:58,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:47:58,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:47:58,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:47:58,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:47:58,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:47:58,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:47:58,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:47:58,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:47:58,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:47:58,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:47:58,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:47:58,033 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:47:58,035 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:47:58,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:47:58,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:47:58,037 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_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c5cb1d1ec86f1df708ae47d652aad74925d4eb7bf3fc3a2c37d76896a5071e8 [2021-11-02 22:47:58,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:47:58,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:47:58,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:47:58,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:47:58,425 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:47:58,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/seq-pthread/cs_szymanski.i [2021-11-02 22:47:58,534 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/data/ef18b40a1/e36ecd7814064e3b9a4dd64848d79af5/FLAG5d9349ad4 [2021-11-02 22:47:59,251 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:47:59,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/sv-benchmarks/c/seq-pthread/cs_szymanski.i [2021-11-02 22:47:59,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/data/ef18b40a1/e36ecd7814064e3b9a4dd64848d79af5/FLAG5d9349ad4 [2021-11-02 22:47:59,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/data/ef18b40a1/e36ecd7814064e3b9a4dd64848d79af5 [2021-11-02 22:47:59,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:47:59,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:47:59,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:47:59,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:47:59,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:47:59,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:47:59" (1/1) ... [2021-11-02 22:47:59,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdefc00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:47:59, skipping insertion in model container [2021-11-02 22:47:59,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:47:59" (1/1) ... [2021-11-02 22:47:59,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:47:59,532 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:47:59,921 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_079d5530-283a-4702-a43c-60aabfd18ae8/sv-benchmarks/c/seq-pthread/cs_szymanski.i[23606,23619] [2021-11-02 22:48:00,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:48:00,081 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:48:00,121 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_079d5530-283a-4702-a43c-60aabfd18ae8/sv-benchmarks/c/seq-pthread/cs_szymanski.i[23606,23619] [2021-11-02 22:48:00,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:48:00,235 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:48:00,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00 WrapperNode [2021-11-02 22:48:00,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:48:00,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:48:00,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:48:00,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:48:00,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:48:00,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:48:00,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:48:00,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:48:00,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:48:00,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:48:00,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:48:00,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:48:00,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (1/1) ... [2021-11-02 22:48:00,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:48:00,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:00,619 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:48:00,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:48:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:48:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:48:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:48:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:48:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:48:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:48:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:48:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:48:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:48:00,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:48:04,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:48:04,542 INFO L299 CfgBuilder]: Removed 152 assume(true) statements. [2021-11-02 22:48:04,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:48:04 BoogieIcfgContainer [2021-11-02 22:48:04,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:48:04,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:48:04,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:48:04,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:48:04,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:47:59" (1/3) ... [2021-11-02 22:48:04,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cfff4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:48:04, skipping insertion in model container [2021-11-02 22:48:04,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:00" (2/3) ... [2021-11-02 22:48:04,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cfff4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:48:04, skipping insertion in model container [2021-11-02 22:48:04,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:48:04" (3/3) ... [2021-11-02 22:48:04,559 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_szymanski.i [2021-11-02 22:48:04,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:48:04,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:48:04,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:48:04,662 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 [2021-11-02 22:48:04,662 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:48:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 192 states have (on average 1.578125) internal successors, (303), 193 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:48:04,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:04,701 INFO L513 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] [2021-11-02 22:48:04,702 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash 138187523, now seen corresponding path program 1 times [2021-11-02 22:48:04,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:04,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813780803] [2021-11-02 22:48:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:04,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:05,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:05,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813780803] [2021-11-02 22:48:05,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813780803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:05,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:05,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:05,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130071948] [2021-11-02 22:48:05,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:05,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:05,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:05,168 INFO L87 Difference]: Start difference. First operand has 194 states, 192 states have (on average 1.578125) internal successors, (303), 193 states have internal predecessors, (303), 0 states have call successors, (0), 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), 3 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) [2021-11-02 22:48:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:05,295 INFO L93 Difference]: Finished difference Result 390 states and 612 transitions. [2021-11-02 22:48:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:05,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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 [2021-11-02 22:48:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:05,317 INFO L225 Difference]: With dead ends: 390 [2021-11-02 22:48:05,317 INFO L226 Difference]: Without dead ends: 194 [2021-11-02 22:48:05,323 INFO L786 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 [2021-11-02 22:48:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-02 22:48:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-11-02 22:48:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.3578947368421053) internal successors, (258), 190 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 258 transitions. [2021-11-02 22:48:05,380 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 258 transitions. Word has length 48 [2021-11-02 22:48:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:05,380 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 258 transitions. [2021-11-02 22:48:05,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 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) [2021-11-02 22:48:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 258 transitions. [2021-11-02 22:48:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:48:05,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:05,385 INFO L513 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, 1, 1, 1] [2021-11-02 22:48:05,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:48:05,385 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:05,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:05,386 INFO L85 PathProgramCache]: Analyzing trace with hash -870478833, now seen corresponding path program 1 times [2021-11-02 22:48:05,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:05,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438949474] [2021-11-02 22:48:05,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:05,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:05,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:05,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438949474] [2021-11-02 22:48:05,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438949474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:05,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:05,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:05,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119743182] [2021-11-02 22:48:05,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:05,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:05,586 INFO L87 Difference]: Start difference. First operand 191 states and 258 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:05,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:05,620 INFO L93 Difference]: Finished difference Result 381 states and 516 transitions. [2021-11-02 22:48:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:05,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:48:05,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:05,624 INFO L225 Difference]: With dead ends: 381 [2021-11-02 22:48:05,624 INFO L226 Difference]: Without dead ends: 193 [2021-11-02 22:48:05,626 INFO L786 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 [2021-11-02 22:48:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-02 22:48:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-11-02 22:48:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.356020942408377) internal successors, (259), 191 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 259 transitions. [2021-11-02 22:48:05,667 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 259 transitions. Word has length 51 [2021-11-02 22:48:05,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:05,668 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 259 transitions. [2021-11-02 22:48:05,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 259 transitions. [2021-11-02 22:48:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:48:05,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:05,674 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-02 22:48:05,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:48:05,674 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:05,675 INFO L85 PathProgramCache]: Analyzing trace with hash -847563631, now seen corresponding path program 1 times [2021-11-02 22:48:05,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:05,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22967595] [2021-11-02 22:48:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:05,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:05,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:05,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22967595] [2021-11-02 22:48:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22967595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:05,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455527326] [2021-11-02 22:48:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:05,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:05,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:05,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:48:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:48:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:06,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455527326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:06,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:06,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:48:06,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251357822] [2021-11-02 22:48:06,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:48:06,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:06,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:48:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:48:06,478 INFO L87 Difference]: Start difference. First operand 192 states and 259 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:06,576 INFO L93 Difference]: Finished difference Result 384 states and 519 transitions. [2021-11-02 22:48:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:48:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:48:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:06,580 INFO L225 Difference]: With dead ends: 384 [2021-11-02 22:48:06,580 INFO L226 Difference]: Without dead ends: 195 [2021-11-02 22:48:06,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:48:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-02 22:48:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2021-11-02 22:48:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.3523316062176165) internal successors, (261), 193 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2021-11-02 22:48:06,601 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 53 [2021-11-02 22:48:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:06,601 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2021-11-02 22:48:06,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2021-11-02 22:48:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:48:06,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:06,606 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:48:06,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:06,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:06,819 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:06,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:06,820 INFO L85 PathProgramCache]: Analyzing trace with hash -300890989, now seen corresponding path program 2 times [2021-11-02 22:48:06,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:06,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102808368] [2021-11-02 22:48:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:06,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:48:07,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:07,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102808368] [2021-11-02 22:48:07,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102808368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:07,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756199834] [2021-11-02 22:48:07,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:07,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:07,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:07,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:48:07,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:48:07,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:48:07,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:48:07,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756199834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:07,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:48:07,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-02 22:48:07,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221304604] [2021-11-02 22:48:07,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:48:07,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:48:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:48:07,960 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:08,039 INFO L93 Difference]: Finished difference Result 351 states and 470 transitions. [2021-11-02 22:48:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:48:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 22:48:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:08,048 INFO L225 Difference]: With dead ends: 351 [2021-11-02 22:48:08,049 INFO L226 Difference]: Without dead ends: 300 [2021-11-02 22:48:08,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:48:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-02 22:48:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-11-02 22:48:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.37123745819398) internal successors, (410), 299 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 410 transitions. [2021-11-02 22:48:08,105 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 410 transitions. Word has length 55 [2021-11-02 22:48:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:08,107 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 410 transitions. [2021-11-02 22:48:08,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 410 transitions. [2021-11-02 22:48:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:48:08,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:08,123 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:48:08,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:08,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:08,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash -101548943, now seen corresponding path program 1 times [2021-11-02 22:48:08,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:08,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438087420] [2021-11-02 22:48:08,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:08,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:48:08,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:08,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438087420] [2021-11-02 22:48:08,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438087420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:08,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316706712] [2021-11-02 22:48:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:08,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:08,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:08,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:08,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:48:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:48:08,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:48:09,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316706712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:09,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:48:09,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-02 22:48:09,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390830002] [2021-11-02 22:48:09,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:09,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:09,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:09,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:48:09,130 INFO L87 Difference]: Start difference. First operand 300 states and 410 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:11,324 INFO L93 Difference]: Finished difference Result 857 states and 1172 transitions. [2021-11-02 22:48:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:11,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-02 22:48:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:11,330 INFO L225 Difference]: With dead ends: 857 [2021-11-02 22:48:11,331 INFO L226 Difference]: Without dead ends: 582 [2021-11-02 22:48:11,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:48:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-02 22:48:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 487. [2021-11-02 22:48:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 1.3786008230452675) internal successors, (670), 486 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 670 transitions. [2021-11-02 22:48:11,357 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 670 transitions. Word has length 84 [2021-11-02 22:48:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:11,357 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 670 transitions. [2021-11-02 22:48:11,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 670 transitions. [2021-11-02 22:48:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:48:11,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:11,360 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:48:11,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:11,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:11,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash -142223693, now seen corresponding path program 1 times [2021-11-02 22:48:11,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:11,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443097790] [2021-11-02 22:48:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:11,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:48:11,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:11,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443097790] [2021-11-02 22:48:11,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443097790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:11,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898681683] [2021-11-02 22:48:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:11,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:11,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:11,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:11,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:48:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:11,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:48:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:12,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898681683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:12,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:12,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-02 22:48:12,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815476613] [2021-11-02 22:48:12,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:48:12,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:12,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:48:12,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:48:12,327 INFO L87 Difference]: Start difference. First operand 487 states and 670 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:12,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:12,496 INFO L93 Difference]: Finished difference Result 990 states and 1362 transitions. [2021-11-02 22:48:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:48:12,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 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 84 [2021-11-02 22:48:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:12,501 INFO L225 Difference]: With dead ends: 990 [2021-11-02 22:48:12,502 INFO L226 Difference]: Without dead ends: 506 [2021-11-02 22:48:12,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:48:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-02 22:48:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 498. [2021-11-02 22:48:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.3722334004024146) internal successors, (682), 497 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 682 transitions. [2021-11-02 22:48:12,530 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 682 transitions. Word has length 84 [2021-11-02 22:48:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:12,531 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 682 transitions. [2021-11-02 22:48:12,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 682 transitions. [2021-11-02 22:48:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:48:12,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:12,535 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-02 22:48:12,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:12,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:12,759 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2017879773, now seen corresponding path program 2 times [2021-11-02 22:48:12,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:12,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938143640] [2021-11-02 22:48:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:12,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:48:13,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:13,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938143640] [2021-11-02 22:48:13,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938143640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:13,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809158778] [2021-11-02 22:48:13,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:13,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:13,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:13,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:13,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:48:13,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:48:13,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:48:13,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:48:13,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809158778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:13,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:48:13,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-02 22:48:13,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691372319] [2021-11-02 22:48:13,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:13,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:48:13,696 INFO L87 Difference]: Start difference. First operand 498 states and 682 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:13,723 INFO L93 Difference]: Finished difference Result 783 states and 1064 transitions. [2021-11-02 22:48:13,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-02 22:48:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:13,728 INFO L225 Difference]: With dead ends: 783 [2021-11-02 22:48:13,728 INFO L226 Difference]: Without dead ends: 498 [2021-11-02 22:48:13,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:48:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-02 22:48:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2021-11-02 22:48:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.3702213279678068) internal successors, (681), 497 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 681 transitions. [2021-11-02 22:48:13,755 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 681 transitions. Word has length 95 [2021-11-02 22:48:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:13,756 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 681 transitions. [2021-11-02 22:48:13,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 681 transitions. [2021-11-02 22:48:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:48:13,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:13,769 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-02 22:48:13,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:13,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:13,983 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash 922185897, now seen corresponding path program 1 times [2021-11-02 22:48:13,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:13,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157973926] [2021-11-02 22:48:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:13,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:48:14,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:14,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157973926] [2021-11-02 22:48:14,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157973926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:14,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794506426] [2021-11-02 22:48:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:14,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:14,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:14,163 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:14,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:48:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:48:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:48:14,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794506426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:14,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:14,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 22:48:14,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378127919] [2021-11-02 22:48:14,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:48:14,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:48:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:48:14,881 INFO L87 Difference]: Start difference. First operand 498 states and 681 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:14,957 INFO L93 Difference]: Finished difference Result 984 states and 1349 transitions. [2021-11-02 22:48:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:48:14,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 95 [2021-11-02 22:48:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:14,963 INFO L225 Difference]: With dead ends: 984 [2021-11-02 22:48:14,963 INFO L226 Difference]: Without dead ends: 507 [2021-11-02 22:48:14,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:48:14,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-02 22:48:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2021-11-02 22:48:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.365612648221344) internal successors, (691), 506 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 691 transitions. [2021-11-02 22:48:14,985 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 691 transitions. Word has length 95 [2021-11-02 22:48:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:14,985 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 691 transitions. [2021-11-02 22:48:14,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 691 transitions. [2021-11-02 22:48:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 22:48:14,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:14,988 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:15,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:15,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:48:15,203 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1593411127, now seen corresponding path program 2 times [2021-11-02 22:48:15,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:15,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461407806] [2021-11-02 22:48:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:15,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:48:15,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:15,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461407806] [2021-11-02 22:48:15,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461407806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:15,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:15,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:15,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945569757] [2021-11-02 22:48:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:15,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:15,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:15,470 INFO L87 Difference]: Start difference. First operand 507 states and 691 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:15,606 INFO L93 Difference]: Finished difference Result 804 states and 1089 transitions. [2021-11-02 22:48:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:15,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-02 22:48:15,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:15,622 INFO L225 Difference]: With dead ends: 804 [2021-11-02 22:48:15,623 INFO L226 Difference]: Without dead ends: 522 [2021-11-02 22:48:15,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:15,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-02 22:48:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2021-11-02 22:48:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.3608445297504799) internal successors, (709), 521 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 709 transitions. [2021-11-02 22:48:15,646 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 709 transitions. Word has length 104 [2021-11-02 22:48:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:15,646 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 709 transitions. [2021-11-02 22:48:15,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 709 transitions. [2021-11-02 22:48:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 22:48:15,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:15,650 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:15,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:48:15,651 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:15,652 INFO L85 PathProgramCache]: Analyzing trace with hash 377257401, now seen corresponding path program 1 times [2021-11-02 22:48:15,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:15,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306377878] [2021-11-02 22:48:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:15,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:48:15,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:15,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306377878] [2021-11-02 22:48:15,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306377878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:15,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:15,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:48:15,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759976548] [2021-11-02 22:48:15,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:48:15,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:48:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:48:15,951 INFO L87 Difference]: Start difference. First operand 522 states and 709 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:16,244 INFO L93 Difference]: Finished difference Result 763 states and 1026 transitions. [2021-11-02 22:48:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:48:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-02 22:48:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:16,249 INFO L225 Difference]: With dead ends: 763 [2021-11-02 22:48:16,249 INFO L226 Difference]: Without dead ends: 488 [2021-11-02 22:48:16,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:48:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-02 22:48:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2021-11-02 22:48:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.3408624229979467) internal successors, (653), 487 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 653 transitions. [2021-11-02 22:48:16,276 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 653 transitions. Word has length 104 [2021-11-02 22:48:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:16,277 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 653 transitions. [2021-11-02 22:48:16,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 653 transitions. [2021-11-02 22:48:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 22:48:16,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:16,279 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:16,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:48:16,280 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:16,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash 579081335, now seen corresponding path program 1 times [2021-11-02 22:48:16,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:16,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247719626] [2021-11-02 22:48:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:16,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:48:20,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:20,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247719626] [2021-11-02 22:48:20,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247719626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:20,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:20,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:48:20,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69647969] [2021-11-02 22:48:20,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:48:20,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:20,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:48:20,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:48:20,947 INFO L87 Difference]: Start difference. First operand 488 states and 653 transitions. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:27,463 INFO L93 Difference]: Finished difference Result 1076 states and 1437 transitions. [2021-11-02 22:48:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:48:27,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-02 22:48:27,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:27,470 INFO L225 Difference]: With dead ends: 1076 [2021-11-02 22:48:27,470 INFO L226 Difference]: Without dead ends: 864 [2021-11-02 22:48:27,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:48:27,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-11-02 22:48:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 539. [2021-11-02 22:48:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.3308550185873607) internal successors, (716), 538 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:27,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 716 transitions. [2021-11-02 22:48:27,501 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 716 transitions. Word has length 104 [2021-11-02 22:48:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:27,501 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 716 transitions. [2021-11-02 22:48:27,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 716 transitions. [2021-11-02 22:48:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-02 22:48:27,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:27,504 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:27,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:48:27,505 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash 161684729, now seen corresponding path program 1 times [2021-11-02 22:48:27,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:27,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380747104] [2021-11-02 22:48:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:27,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:48:33,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:33,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380747104] [2021-11-02 22:48:33,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380747104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:33,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:33,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:48:33,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447026494] [2021-11-02 22:48:33,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:48:33,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:33,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:48:33,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:48:33,386 INFO L87 Difference]: Start difference. First operand 539 states and 716 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:38,223 INFO L93 Difference]: Finished difference Result 952 states and 1256 transitions. [2021-11-02 22:48:38,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:48:38,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-02 22:48:38,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:38,230 INFO L225 Difference]: With dead ends: 952 [2021-11-02 22:48:38,231 INFO L226 Difference]: Without dead ends: 740 [2021-11-02 22:48:38,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:48:38,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-11-02 22:48:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 522. [2021-11-02 22:48:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 1.3301343570057582) internal successors, (693), 521 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 693 transitions. [2021-11-02 22:48:38,264 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 693 transitions. Word has length 104 [2021-11-02 22:48:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:38,265 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 693 transitions. [2021-11-02 22:48:38,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:38,265 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 693 transitions. [2021-11-02 22:48:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 22:48:38,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:38,268 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:38,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:48:38,268 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1333098919, now seen corresponding path program 1 times [2021-11-02 22:48:38,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:38,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491732434] [2021-11-02 22:48:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:38,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:48:38,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:38,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491732434] [2021-11-02 22:48:38,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491732434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:38,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:38,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:38,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085855354] [2021-11-02 22:48:38,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:38,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:38,388 INFO L87 Difference]: Start difference. First operand 522 states and 693 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:38,490 INFO L93 Difference]: Finished difference Result 913 states and 1235 transitions. [2021-11-02 22:48:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-02 22:48:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:38,496 INFO L225 Difference]: With dead ends: 913 [2021-11-02 22:48:38,496 INFO L226 Difference]: Without dead ends: 536 [2021-11-02 22:48:38,497 INFO L786 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 [2021-11-02 22:48:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-02 22:48:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2021-11-02 22:48:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.3196261682242991) internal successors, (706), 535 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 706 transitions. [2021-11-02 22:48:38,528 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 706 transitions. Word has length 107 [2021-11-02 22:48:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:38,528 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 706 transitions. [2021-11-02 22:48:38,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 706 transitions. [2021-11-02 22:48:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 22:48:38,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:38,531 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:38,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:48:38,532 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash 53686491, now seen corresponding path program 1 times [2021-11-02 22:48:38,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:38,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561771064] [2021-11-02 22:48:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:38,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:48:42,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:42,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561771064] [2021-11-02 22:48:42,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561771064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:42,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:42,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:48:42,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830593345] [2021-11-02 22:48:42,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:48:42,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:48:42,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:48:42,567 INFO L87 Difference]: Start difference. First operand 536 states and 706 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:43,174 INFO L93 Difference]: Finished difference Result 1232 states and 1615 transitions. [2021-11-02 22:48:43,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:48:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-02 22:48:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:43,179 INFO L225 Difference]: With dead ends: 1232 [2021-11-02 22:48:43,180 INFO L226 Difference]: Without dead ends: 748 [2021-11-02 22:48:43,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:48:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-11-02 22:48:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 568. [2021-11-02 22:48:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.27336860670194) internal successors, (722), 567 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 722 transitions. [2021-11-02 22:48:43,215 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 722 transitions. Word has length 107 [2021-11-02 22:48:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:43,215 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 722 transitions. [2021-11-02 22:48:43,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 722 transitions. [2021-11-02 22:48:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 22:48:43,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:43,218 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:43,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:48:43,219 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:43,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1705643803, now seen corresponding path program 1 times [2021-11-02 22:48:43,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:43,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615525079] [2021-11-02 22:48:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:43,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:48:50,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:50,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615525079] [2021-11-02 22:48:50,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615525079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:50,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:50,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:48:50,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962006698] [2021-11-02 22:48:50,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:48:50,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:48:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:48:50,132 INFO L87 Difference]: Start difference. First operand 568 states and 722 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:55,599 INFO L93 Difference]: Finished difference Result 993 states and 1244 transitions. [2021-11-02 22:48:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:48:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-02 22:48:55,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:55,605 INFO L225 Difference]: With dead ends: 993 [2021-11-02 22:48:55,606 INFO L226 Difference]: Without dead ends: 833 [2021-11-02 22:48:55,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:48:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-02 22:48:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 568. [2021-11-02 22:48:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.2680776014109347) internal successors, (719), 567 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 719 transitions. [2021-11-02 22:48:55,688 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 719 transitions. Word has length 107 [2021-11-02 22:48:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:55,688 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 719 transitions. [2021-11-02 22:48:55,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 12 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:48:55,689 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 719 transitions. [2021-11-02 22:48:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-02 22:48:55,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:55,692 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:55,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:48:55,693 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash -2003437764, now seen corresponding path program 1 times [2021-11-02 22:48:55,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:55,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826283203] [2021-11-02 22:48:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:55,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:49:01,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:01,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826283203] [2021-11-02 22:49:01,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826283203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:01,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:01,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:49:01,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020794582] [2021-11-02 22:49:01,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:49:01,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:49:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:49:01,421 INFO L87 Difference]: Start difference. First operand 568 states and 719 transitions. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:06,419 INFO L93 Difference]: Finished difference Result 1035 states and 1299 transitions. [2021-11-02 22:49:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:49:06,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-02 22:49:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:06,432 INFO L225 Difference]: With dead ends: 1035 [2021-11-02 22:49:06,433 INFO L226 Difference]: Without dead ends: 902 [2021-11-02 22:49:06,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:49:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-11-02 22:49:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 582. [2021-11-02 22:49:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.2650602409638554) internal successors, (735), 581 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 735 transitions. [2021-11-02 22:49:06,482 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 735 transitions. Word has length 112 [2021-11-02 22:49:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:06,482 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 735 transitions. [2021-11-02 22:49:06,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 735 transitions. [2021-11-02 22:49:06,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 22:49:06,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:06,485 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:06,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:49:06,486 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:06,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:06,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1480480720, now seen corresponding path program 1 times [2021-11-02 22:49:06,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:06,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55088421] [2021-11-02 22:49:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:06,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:09,442 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:49:09,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:09,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55088421] [2021-11-02 22:49:09,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55088421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:09,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:09,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:49:09,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118452413] [2021-11-02 22:49:09,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:49:09,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:09,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:49:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:49:09,445 INFO L87 Difference]: Start difference. First operand 582 states and 735 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:12,115 INFO L93 Difference]: Finished difference Result 664 states and 829 transitions. [2021-11-02 22:49:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:49:12,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 115 [2021-11-02 22:49:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:12,119 INFO L225 Difference]: With dead ends: 664 [2021-11-02 22:49:12,119 INFO L226 Difference]: Without dead ends: 555 [2021-11-02 22:49:12,120 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-02 22:49:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-02 22:49:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.2707581227436824) internal successors, (704), 554 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 704 transitions. [2021-11-02 22:49:12,174 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 704 transitions. Word has length 115 [2021-11-02 22:49:12,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:12,174 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 704 transitions. [2021-11-02 22:49:12,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 704 transitions. [2021-11-02 22:49:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 22:49:12,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:12,182 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:12,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:49:12,183 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:12,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1059353518, now seen corresponding path program 1 times [2021-11-02 22:49:12,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:12,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482357722] [2021-11-02 22:49:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:12,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:49:15,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:15,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482357722] [2021-11-02 22:49:15,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482357722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:15,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:15,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:49:15,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435599355] [2021-11-02 22:49:15,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:49:15,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:15,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:49:15,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:49:15,407 INFO L87 Difference]: Start difference. First operand 555 states and 704 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:18,131 INFO L93 Difference]: Finished difference Result 778 states and 979 transitions. [2021-11-02 22:49:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:49:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 115 [2021-11-02 22:49:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:18,134 INFO L225 Difference]: With dead ends: 778 [2021-11-02 22:49:18,134 INFO L226 Difference]: Without dead ends: 526 [2021-11-02 22:49:18,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:49:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-11-02 22:49:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2021-11-02 22:49:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.2723809523809524) internal successors, (668), 525 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 668 transitions. [2021-11-02 22:49:18,171 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 668 transitions. Word has length 115 [2021-11-02 22:49:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:18,171 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 668 transitions. [2021-11-02 22:49:18,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 668 transitions. [2021-11-02 22:49:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 22:49:18,173 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:18,174 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:49:18,174 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash 670883950, now seen corresponding path program 1 times [2021-11-02 22:49:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:18,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885656052] [2021-11-02 22:49:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:18,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:49:23,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:23,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885656052] [2021-11-02 22:49:23,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885656052] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:23,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:23,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:49:23,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712392342] [2021-11-02 22:49:23,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:49:23,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:49:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:49:23,254 INFO L87 Difference]: Start difference. First operand 526 states and 668 transitions. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:26,545 INFO L93 Difference]: Finished difference Result 633 states and 781 transitions. [2021-11-02 22:49:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:49:26,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 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 115 [2021-11-02 22:49:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:26,550 INFO L225 Difference]: With dead ends: 633 [2021-11-02 22:49:26,551 INFO L226 Difference]: Without dead ends: 593 [2021-11-02 22:49:26,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:49:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-02 22:49:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 531. [2021-11-02 22:49:26,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.271698113207547) internal successors, (674), 530 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 674 transitions. [2021-11-02 22:49:26,614 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 674 transitions. Word has length 115 [2021-11-02 22:49:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:26,614 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 674 transitions. [2021-11-02 22:49:26,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 674 transitions. [2021-11-02 22:49:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-02 22:49:26,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:26,617 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:26,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:49:26,618 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:26,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2014545493, now seen corresponding path program 1 times [2021-11-02 22:49:26,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:26,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926913978] [2021-11-02 22:49:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:26,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:49:27,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:27,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926913978] [2021-11-02 22:49:27,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926913978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:27,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:27,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-02 22:49:27,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60832811] [2021-11-02 22:49:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:49:27,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:49:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:49:27,173 INFO L87 Difference]: Start difference. First operand 531 states and 674 transitions. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:34,106 INFO L93 Difference]: Finished difference Result 1004 states and 1261 transitions. [2021-11-02 22:49:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:49:34,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 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 [2021-11-02 22:49:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:34,111 INFO L225 Difference]: With dead ends: 1004 [2021-11-02 22:49:34,111 INFO L226 Difference]: Without dead ends: 751 [2021-11-02 22:49:34,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:49:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-11-02 22:49:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 559. [2021-11-02 22:49:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.2652329749103943) internal successors, (706), 558 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 706 transitions. [2021-11-02 22:49:34,157 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 706 transitions. Word has length 119 [2021-11-02 22:49:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:34,158 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 706 transitions. [2021-11-02 22:49:34,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:34,158 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 706 transitions. [2021-11-02 22:49:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 22:49:34,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:34,161 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:34,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:49:34,161 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash 474976066, now seen corresponding path program 1 times [2021-11-02 22:49:34,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:34,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194043029] [2021-11-02 22:49:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:34,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:49:38,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:38,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194043029] [2021-11-02 22:49:38,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194043029] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:38,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:38,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:49:38,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134705311] [2021-11-02 22:49:38,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:49:38,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:49:38,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:49:38,711 INFO L87 Difference]: Start difference. First operand 559 states and 706 transitions. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:42,965 INFO L93 Difference]: Finished difference Result 888 states and 1095 transitions. [2021-11-02 22:49:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:49:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-02 22:49:42,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:42,970 INFO L225 Difference]: With dead ends: 888 [2021-11-02 22:49:42,971 INFO L226 Difference]: Without dead ends: 848 [2021-11-02 22:49:42,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:49:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-02 22:49:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 625. [2021-11-02 22:49:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 1.2804487179487178) internal successors, (799), 624 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 799 transitions. [2021-11-02 22:49:43,027 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 799 transitions. Word has length 122 [2021-11-02 22:49:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:43,028 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 799 transitions. [2021-11-02 22:49:43,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 799 transitions. [2021-11-02 22:49:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 22:49:43,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:43,031 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:43,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:49:43,032 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:43,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1982008849, now seen corresponding path program 1 times [2021-11-02 22:49:43,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:43,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249115095] [2021-11-02 22:49:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:43,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:49:54,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:54,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249115095] [2021-11-02 22:49:54,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249115095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:54,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:54,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:49:54,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969722976] [2021-11-02 22:49:54,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:49:54,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:54,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:49:54,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:49:54,195 INFO L87 Difference]: Start difference. First operand 625 states and 799 transitions. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:59,154 INFO L93 Difference]: Finished difference Result 991 states and 1230 transitions. [2021-11-02 22:49:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:49:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-02 22:49:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:59,162 INFO L225 Difference]: With dead ends: 991 [2021-11-02 22:49:59,163 INFO L226 Difference]: Without dead ends: 951 [2021-11-02 22:49:59,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:49:59,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-11-02 22:49:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 559. [2021-11-02 22:49:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 1.2634408602150538) internal successors, (705), 558 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 705 transitions. [2021-11-02 22:49:59,223 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 705 transitions. Word has length 122 [2021-11-02 22:49:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:59,224 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 705 transitions. [2021-11-02 22:49:59,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 11 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 705 transitions. [2021-11-02 22:49:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-02 22:49:59,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:59,227 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:59,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:49:59,228 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:59,228 INFO L85 PathProgramCache]: Analyzing trace with hash -46577261, now seen corresponding path program 1 times [2021-11-02 22:49:59,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:59,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045113607] [2021-11-02 22:49:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:59,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:50:00,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:00,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045113607] [2021-11-02 22:50:00,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045113607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:00,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:00,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:50:00,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246078475] [2021-11-02 22:50:00,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:50:00,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:50:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:50:00,813 INFO L87 Difference]: Start difference. First operand 559 states and 705 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:05,072 INFO L93 Difference]: Finished difference Result 798 states and 1002 transitions. [2021-11-02 22:50:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:50:05,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-02 22:50:05,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:05,076 INFO L225 Difference]: With dead ends: 798 [2021-11-02 22:50:05,076 INFO L226 Difference]: Without dead ends: 448 [2021-11-02 22:50:05,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:50:05,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-02 22:50:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 424. [2021-11-02 22:50:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.2340425531914894) internal successors, (522), 423 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 522 transitions. [2021-11-02 22:50:05,144 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 522 transitions. Word has length 122 [2021-11-02 22:50:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:05,145 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 522 transitions. [2021-11-02 22:50:05,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 522 transitions. [2021-11-02 22:50:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 22:50:05,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:05,148 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:05,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:50:05,148 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:05,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:05,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1440814337, now seen corresponding path program 1 times [2021-11-02 22:50:05,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:05,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265280452] [2021-11-02 22:50:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:05,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:50:09,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:09,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265280452] [2021-11-02 22:50:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265280452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:09,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:09,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:50:09,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271051854] [2021-11-02 22:50:09,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:09,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:09,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:09,094 INFO L87 Difference]: Start difference. First operand 424 states and 522 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:09,623 INFO L93 Difference]: Finished difference Result 804 states and 976 transitions. [2021-11-02 22:50:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:09,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 123 [2021-11-02 22:50:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:09,627 INFO L225 Difference]: With dead ends: 804 [2021-11-02 22:50:09,627 INFO L226 Difference]: Without dead ends: 497 [2021-11-02 22:50:09,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-02 22:50:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 445. [2021-11-02 22:50:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.222972972972973) internal successors, (543), 444 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 543 transitions. [2021-11-02 22:50:09,685 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 543 transitions. Word has length 123 [2021-11-02 22:50:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:09,686 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 543 transitions. [2021-11-02 22:50:09,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 543 transitions. [2021-11-02 22:50:09,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-02 22:50:09,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:09,689 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:09,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:50:09,689 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:09,690 INFO L85 PathProgramCache]: Analyzing trace with hash -210249285, now seen corresponding path program 1 times [2021-11-02 22:50:09,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:09,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860516005] [2021-11-02 22:50:09,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:09,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 22:51:30,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:30,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860516005] [2021-11-02 22:51:30,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860516005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:30,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491176802] [2021-11-02 22:51:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:30,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:30,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:30,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:30,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_079d5530-283a-4702-a43c-60aabfd18ae8/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:51:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 200 conjunts are in the unsatisfiable core [2021-11-02 22:51:34,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:35,149 INFO L354 Elim1Store]: treesize reduction 1046, result has 6.6 percent of original size [2021-11-02 22:51:35,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 29 case distinctions, treesize of input 829 treesize of output 852 [2021-11-02 22:51:43,144 INFO L354 Elim1Store]: treesize reduction 1592, result has 14.7 percent of original size [2021-11-02 22:51:43,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 15 select indices, 15 select index equivalence classes, 21 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 102 case distinctions, treesize of input 210 treesize of output 441 [2021-11-02 22:52:17,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 38 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 46 [2021-11-02 22:52:18,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:53:07,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:53:36,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:54:27,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 38 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 46 [2021-11-02 22:54:56,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:55:25,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:55:59,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:56:57,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 38 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 46 [2021-11-02 22:56:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:57:44,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 30 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 25 [2021-11-02 22:57:59,707 INFO L354 Elim1Store]: treesize reduction 101, result has 16.5 percent of original size [2021-11-02 22:57:59,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 19 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 252 treesize of output 218