./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/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_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba983053090b7e7410066c63fe0cfe9ad27960a7dc19d54045684ba21359c88d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:27:37,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:27:37,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:27:38,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:27:38,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:27:38,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:27:38,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:27:38,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:27:38,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:27:38,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:27:38,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:27:38,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:27:38,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:27:38,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:27:38,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:27:38,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:27:38,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:27:38,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:27:38,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:27:38,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:27:38,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:27:38,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:27:38,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:27:38,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:27:38,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:27:38,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:27:38,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:27:38,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:27:38,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:27:38,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:27:38,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:27:38,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:27:38,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:27:38,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:27:38,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:27:38,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:27:38,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:27:38,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:27:38,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:27:38,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:27:38,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:27:38,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:27:38,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:27:38,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:27:38,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:27:38,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:27:38,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:27:38,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:27:38,109 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:27:38,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:27:38,110 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:27:38,110 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:27:38,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:27:38,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:27:38,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:27:38,111 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:27:38,111 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:27:38,111 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:27:38,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:27:38,112 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:27:38,112 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:27:38,112 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:27:38,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:27:38,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:27:38,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:27:38,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:27:38,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:27:38,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:27:38,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:27:38,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:27:38,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:27:38,115 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_79075162-f98a-4d2a-af79-f9986227d696/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba983053090b7e7410066c63fe0cfe9ad27960a7dc19d54045684ba21359c88d [2021-11-02 22:27:38,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:27:38,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:27:38,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:27:38,505 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:27:38,507 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:27:38,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/memsafety-ext/tree_cnstr.i [2021-11-02 22:27:38,604 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/data/1736a61dd/8120a8a4f45c448eaf9f3a9ab91c26e9/FLAG33e09fecd [2021-11-02 22:27:39,197 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:27:39,199 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/sv-benchmarks/c/memsafety-ext/tree_cnstr.i [2021-11-02 22:27:39,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/data/1736a61dd/8120a8a4f45c448eaf9f3a9ab91c26e9/FLAG33e09fecd [2021-11-02 22:27:39,488 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/data/1736a61dd/8120a8a4f45c448eaf9f3a9ab91c26e9 [2021-11-02 22:27:39,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:27:39,501 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:27:39,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:27:39,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:27:39,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:27:39,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:27:39" (1/1) ... [2021-11-02 22:27:39,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36867a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:39, skipping insertion in model container [2021-11-02 22:27:39,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:27:39" (1/1) ... [2021-11-02 22:27:39,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:27:39,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:27:39,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:27:39,969 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:27:40,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:27:40,077 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:27:40,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40 WrapperNode [2021-11-02 22:27:40,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:27:40,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:27:40,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:27:40,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:27:40,094 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:27:40,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:27:40,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:27:40,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:27:40,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (1/1) ... [2021-11-02 22:27:40,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:27:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:40,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:27:40,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:27:40,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:27:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:27:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:27:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:27:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:27:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:27:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:27:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:27:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:27:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:27:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:27:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:27:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:27:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:27:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:27:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:27:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:27:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:27:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:27:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:27:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:27:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:27:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:27:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:27:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:27:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:27:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:27:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:27:40,314 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:27:40,315 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:27:40,316 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:27:40,317 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:27:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:27:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:27:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:27:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:27:40,318 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:27:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:27:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:27:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:27:40,319 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:27:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:27:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:27:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:27:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:27:40,320 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:27:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:27:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:27:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:27:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:27:40,321 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:27:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:27:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:27:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:27:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:27:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:27:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:27:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:27:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:27:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:27:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:27:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:27:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:27:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:27:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:27:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:27:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:27:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:27:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:27:40,325 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:27:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:27:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:27:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:27:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:27:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:27:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:27:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:27:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:27:40,327 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:27:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:27:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:27:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:27:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:27:40,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:27:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:27:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:27:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:27:40,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:27:40,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:27:41,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:27:41,190 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:27:41,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:27:41 BoogieIcfgContainer [2021-11-02 22:27:41,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:27:41,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:27:41,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:27:41,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:27:41,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:27:39" (1/3) ... [2021-11-02 22:27:41,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da8ce5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:27:41, skipping insertion in model container [2021-11-02 22:27:41,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:27:40" (2/3) ... [2021-11-02 22:27:41,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da8ce5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:27:41, skipping insertion in model container [2021-11-02 22:27:41,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:27:41" (3/3) ... [2021-11-02 22:27:41,204 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_cnstr.i [2021-11-02 22:27:41,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:27:41,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2021-11-02 22:27:41,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:27:41,291 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 22:27:41,292 INFO L340 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2021-11-02 22:27:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:27:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:27:41,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:41,322 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:41,323 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:41,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1132679471, now seen corresponding path program 1 times [2021-11-02 22:27:41,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:41,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277350734] [2021-11-02 22:27:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:41,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:41,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:41,581 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 22:27:41,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:41,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277350734] [2021-11-02 22:27:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277350734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:41,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:41,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:27:41,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265484824] [2021-11-02 22:27:41,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:41,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:41,613 INFO L87 Difference]: Start difference. First operand has 128 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 123 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:41,952 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2021-11-02 22:27:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:27:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:41,967 INFO L225 Difference]: With dead ends: 170 [2021-11-02 22:27:41,968 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 22:27:41,969 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 22:27:41,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 22:27:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 123. [2021-11-02 22:27:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 66 states have (on average 2.015151515151515) internal successors, (133), 119 states have internal predecessors, (133), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-11-02 22:27:42,017 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 7 [2021-11-02 22:27:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:42,018 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-11-02 22:27:42,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-11-02 22:27:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:27:42,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:42,019 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:42,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:27:42,020 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1132679472, now seen corresponding path program 1 times [2021-11-02 22:27:42,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:42,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288516878] [2021-11-02 22:27:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:42,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:42,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:42,116 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 22:27:42,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:42,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288516878] [2021-11-02 22:27:42,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288516878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:42,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:27:42,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575265981] [2021-11-02 22:27:42,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:42,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:42,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:42,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:42,120 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:42,430 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2021-11-02 22:27:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:42,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:27:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:42,433 INFO L225 Difference]: With dead ends: 164 [2021-11-02 22:27:42,433 INFO L226 Difference]: Without dead ends: 164 [2021-11-02 22:27:42,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 22:27:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-02 22:27:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2021-11-02 22:27:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 117 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-11-02 22:27:42,448 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 7 [2021-11-02 22:27:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:42,449 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-11-02 22:27:42,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-11-02 22:27:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:27:42,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:42,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:42,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:27:42,451 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1107563195, now seen corresponding path program 1 times [2021-11-02 22:27:42,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:42,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439314750] [2021-11-02 22:27:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:42,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:42,540 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 22:27:42,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:42,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439314750] [2021-11-02 22:27:42,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439314750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:42,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:42,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:42,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562355402] [2021-11-02 22:27:42,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:27:42,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:27:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:27:42,545 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:42,908 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2021-11-02 22:27:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:27:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-02 22:27:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:42,911 INFO L225 Difference]: With dead ends: 150 [2021-11-02 22:27:42,911 INFO L226 Difference]: Without dead ends: 150 [2021-11-02 22:27:42,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-02 22:27:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 108. [2021-11-02 22:27:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 104 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-11-02 22:27:42,922 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 11 [2021-11-02 22:27:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:42,922 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-11-02 22:27:42,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-11-02 22:27:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:27:42,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:42,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:42,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:27:42,924 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1107563196, now seen corresponding path program 1 times [2021-11-02 22:27:42,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:42,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478603641] [2021-11-02 22:27:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:42,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:43,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:43,024 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 22:27:43,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:43,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478603641] [2021-11-02 22:27:43,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478603641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:43,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:43,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:43,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350758689] [2021-11-02 22:27:43,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:27:43,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:27:43,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:27:43,028 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:43,485 INFO L93 Difference]: Finished difference Result 231 states and 263 transitions. [2021-11-02 22:27:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:27:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-02 22:27:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:43,488 INFO L225 Difference]: With dead ends: 231 [2021-11-02 22:27:43,488 INFO L226 Difference]: Without dead ends: 231 [2021-11-02 22:27:43,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-02 22:27:43,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 176. [2021-11-02 22:27:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.6934306569343065) internal successors, (232), 172 states have internal predecessors, (232), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 235 transitions. [2021-11-02 22:27:43,511 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 235 transitions. Word has length 11 [2021-11-02 22:27:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:43,512 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 235 transitions. [2021-11-02 22:27:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 235 transitions. [2021-11-02 22:27:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:27:43,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:43,513 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:43,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:27:43,514 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:43,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1477836561, now seen corresponding path program 1 times [2021-11-02 22:27:43,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:43,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195315977] [2021-11-02 22:27:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:43,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:43,625 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 22:27:43,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:43,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195315977] [2021-11-02 22:27:43,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195315977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:43,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:43,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:43,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685176505] [2021-11-02 22:27:43,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:43,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:43,628 INFO L87 Difference]: Start difference. First operand 176 states and 235 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:43,846 INFO L93 Difference]: Finished difference Result 190 states and 233 transitions. [2021-11-02 22:27:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-02 22:27:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:43,849 INFO L225 Difference]: With dead ends: 190 [2021-11-02 22:27:43,849 INFO L226 Difference]: Without dead ends: 190 [2021-11-02 22:27:43,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:27:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-02 22:27:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2021-11-02 22:27:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 137 states have (on average 1.6788321167883211) internal successors, (230), 172 states have internal predecessors, (230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 233 transitions. [2021-11-02 22:27:43,874 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 233 transitions. Word has length 14 [2021-11-02 22:27:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:43,878 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 233 transitions. [2021-11-02 22:27:43,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 233 transitions. [2021-11-02 22:27:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:27:43,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:43,880 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:43,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:27:43,881 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:43,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1082826400, now seen corresponding path program 1 times [2021-11-02 22:27:43,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:43,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817081107] [2021-11-02 22:27:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:43,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:43,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:43,987 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 22:27:43,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:43,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817081107] [2021-11-02 22:27:43,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817081107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:43,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:43,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:43,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372154564] [2021-11-02 22:27:43,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:43,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:43,996 INFO L87 Difference]: Start difference. First operand 176 states and 233 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:44,187 INFO L93 Difference]: Finished difference Result 179 states and 236 transitions. [2021-11-02 22:27:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:44,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 22:27:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:44,193 INFO L225 Difference]: With dead ends: 179 [2021-11-02 22:27:44,193 INFO L226 Difference]: Without dead ends: 179 [2021-11-02 22:27:44,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:27:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-02 22:27:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-11-02 22:27:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 140 states have (on average 1.6642857142857144) internal successors, (233), 175 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 236 transitions. [2021-11-02 22:27:44,212 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 236 transitions. Word has length 18 [2021-11-02 22:27:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:44,212 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 236 transitions. [2021-11-02 22:27:44,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 236 transitions. [2021-11-02 22:27:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:27:44,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:44,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:44,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:27:44,216 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:44,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash -464671652, now seen corresponding path program 1 times [2021-11-02 22:27:44,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:44,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177370916] [2021-11-02 22:27:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:44,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:44,316 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 22:27:44,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:44,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177370916] [2021-11-02 22:27:44,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177370916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:44,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:44,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:44,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413732946] [2021-11-02 22:27:44,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:44,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:44,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:44,322 INFO L87 Difference]: Start difference. First operand 179 states and 236 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:44,479 INFO L93 Difference]: Finished difference Result 181 states and 238 transitions. [2021-11-02 22:27:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 22:27:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:44,483 INFO L225 Difference]: With dead ends: 181 [2021-11-02 22:27:44,483 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 22:27:44,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:27:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 22:27:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-02 22:27:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 142 states have (on average 1.6549295774647887) internal successors, (235), 177 states have internal predecessors, (235), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 238 transitions. [2021-11-02 22:27:44,491 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 238 transitions. Word has length 18 [2021-11-02 22:27:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:44,492 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 238 transitions. [2021-11-02 22:27:44,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,492 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 238 transitions. [2021-11-02 22:27:44,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:27:44,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:44,493 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] [2021-11-02 22:27:44,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:27:44,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1263994875, now seen corresponding path program 1 times [2021-11-02 22:27:44,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:44,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511339363] [2021-11-02 22:27:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:44,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:44,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:44,574 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 22:27:44,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:44,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511339363] [2021-11-02 22:27:44,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511339363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:44,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:44,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:44,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428177803] [2021-11-02 22:27:44,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:44,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:44,578 INFO L87 Difference]: Start difference. First operand 181 states and 238 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:44,768 INFO L93 Difference]: Finished difference Result 196 states and 247 transitions. [2021-11-02 22:27:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-02 22:27:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:44,770 INFO L225 Difference]: With dead ends: 196 [2021-11-02 22:27:44,770 INFO L226 Difference]: Without dead ends: 196 [2021-11-02 22:27:44,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:27:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-02 22:27:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 183. [2021-11-02 22:27:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 144 states have (on average 1.625) internal successors, (234), 179 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 237 transitions. [2021-11-02 22:27:44,778 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 237 transitions. Word has length 20 [2021-11-02 22:27:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:44,778 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 237 transitions. [2021-11-02 22:27:44,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 237 transitions. [2021-11-02 22:27:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:27:44,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:44,780 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] [2021-11-02 22:27:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:27:44,781 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1063863391, now seen corresponding path program 1 times [2021-11-02 22:27:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:44,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015080385] [2021-11-02 22:27:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:44,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:44,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:44,936 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 22:27:44,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:44,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015080385] [2021-11-02 22:27:44,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015080385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:44,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:44,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:27:44,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230948397] [2021-11-02 22:27:44,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:27:44,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:27:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:27:44,943 INFO L87 Difference]: Start difference. First operand 183 states and 237 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:45,366 INFO L93 Difference]: Finished difference Result 278 states and 347 transitions. [2021-11-02 22:27:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:27:45,368 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-02 22:27:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:45,369 INFO L225 Difference]: With dead ends: 278 [2021-11-02 22:27:45,369 INFO L226 Difference]: Without dead ends: 278 [2021-11-02 22:27:45,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:27:45,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-02 22:27:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 197. [2021-11-02 22:27:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 158 states have (on average 1.6012658227848102) internal successors, (253), 193 states have internal predecessors, (253), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 256 transitions. [2021-11-02 22:27:45,378 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 256 transitions. Word has length 20 [2021-11-02 22:27:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:45,379 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 256 transitions. [2021-11-02 22:27:45,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 256 transitions. [2021-11-02 22:27:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:27:45,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:45,380 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] [2021-11-02 22:27:45,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:27:45,381 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash -981522250, now seen corresponding path program 1 times [2021-11-02 22:27:45,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:45,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623347986] [2021-11-02 22:27:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:45,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:45,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:45,511 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 22:27:45,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:45,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623347986] [2021-11-02 22:27:45,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623347986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:45,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:45,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:27:45,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908133933] [2021-11-02 22:27:45,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:27:45,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:27:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:27:45,514 INFO L87 Difference]: Start difference. First operand 197 states and 256 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:45,945 INFO L93 Difference]: Finished difference Result 277 states and 345 transitions. [2021-11-02 22:27:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:27:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-02 22:27:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:45,949 INFO L225 Difference]: With dead ends: 277 [2021-11-02 22:27:45,949 INFO L226 Difference]: Without dead ends: 277 [2021-11-02 22:27:45,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:27:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-02 22:27:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 232. [2021-11-02 22:27:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 193 states have (on average 1.6062176165803108) internal successors, (310), 228 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-11-02 22:27:45,958 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 21 [2021-11-02 22:27:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:45,958 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-11-02 22:27:45,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-11-02 22:27:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:27:45,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:45,960 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] [2021-11-02 22:27:45,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:27:45,961 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr53ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:45,962 INFO L85 PathProgramCache]: Analyzing trace with hash 529152575, now seen corresponding path program 1 times [2021-11-02 22:27:45,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:45,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836401533] [2021-11-02 22:27:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:45,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:46,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:46,038 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 22:27:46,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:46,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836401533] [2021-11-02 22:27:46,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836401533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:46,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:46,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:46,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120813865] [2021-11-02 22:27:46,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:27:46,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:46,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:27:46,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:27:46,041 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:46,345 INFO L93 Difference]: Finished difference Result 270 states and 332 transitions. [2021-11-02 22:27:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:27:46,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-02 22:27:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:46,348 INFO L225 Difference]: With dead ends: 270 [2021-11-02 22:27:46,348 INFO L226 Difference]: Without dead ends: 270 [2021-11-02 22:27:46,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-02 22:27:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 233. [2021-11-02 22:27:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 194 states have (on average 1.6030927835051547) internal successors, (311), 229 states have internal predecessors, (311), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 314 transitions. [2021-11-02 22:27:46,358 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 314 transitions. Word has length 21 [2021-11-02 22:27:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:46,358 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 314 transitions. [2021-11-02 22:27:46,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 314 transitions. [2021-11-02 22:27:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:27:46,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:46,359 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] [2021-11-02 22:27:46,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:27:46,360 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:46,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash 113585727, now seen corresponding path program 1 times [2021-11-02 22:27:46,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:46,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194440313] [2021-11-02 22:27:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:46,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:46,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:46,417 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 22:27:46,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:46,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194440313] [2021-11-02 22:27:46,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194440313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:46,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:46,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:46,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96305413] [2021-11-02 22:27:46,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:46,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:46,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:46,420 INFO L87 Difference]: Start difference. First operand 233 states and 314 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:46,591 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2021-11-02 22:27:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 22:27:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:46,594 INFO L225 Difference]: With dead ends: 236 [2021-11-02 22:27:46,594 INFO L226 Difference]: Without dead ends: 236 [2021-11-02 22:27:46,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:27:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-02 22:27:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-02 22:27:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 197 states have (on average 1.5939086294416243) internal successors, (314), 232 states have internal predecessors, (314), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 317 transitions. [2021-11-02 22:27:46,604 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 317 transitions. Word has length 22 [2021-11-02 22:27:46,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:46,604 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 317 transitions. [2021-11-02 22:27:46,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:46,604 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 317 transitions. [2021-11-02 22:27:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:27:46,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:46,605 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] [2021-11-02 22:27:46,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:27:46,606 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:46,606 INFO L85 PathProgramCache]: Analyzing trace with hash 56327425, now seen corresponding path program 1 times [2021-11-02 22:27:46,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:46,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158571233] [2021-11-02 22:27:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:46,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:46,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:46,672 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 22:27:46,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:46,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158571233] [2021-11-02 22:27:46,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158571233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:46,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:46,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:27:46,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620549423] [2021-11-02 22:27:46,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:27:46,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:27:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:46,675 INFO L87 Difference]: Start difference. First operand 236 states and 317 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:47,085 INFO L93 Difference]: Finished difference Result 235 states and 315 transitions. [2021-11-02 22:27:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:27:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 22:27:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:47,088 INFO L225 Difference]: With dead ends: 235 [2021-11-02 22:27:47,088 INFO L226 Difference]: Without dead ends: 235 [2021-11-02 22:27:47,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-02 22:27:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-11-02 22:27:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 197 states have (on average 1.583756345177665) internal successors, (312), 231 states have internal predecessors, (312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 315 transitions. [2021-11-02 22:27:47,098 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 315 transitions. Word has length 22 [2021-11-02 22:27:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:47,098 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 315 transitions. [2021-11-02 22:27:47,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 315 transitions. [2021-11-02 22:27:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:27:47,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:47,101 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] [2021-11-02 22:27:47,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:27:47,101 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash 56327426, now seen corresponding path program 1 times [2021-11-02 22:27:47,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:47,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107585925] [2021-11-02 22:27:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:47,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:47,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:47,228 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 22:27:47,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:47,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107585925] [2021-11-02 22:27:47,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107585925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:47,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:47,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:27:47,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164418101] [2021-11-02 22:27:47,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:27:47,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:27:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:47,230 INFO L87 Difference]: Start difference. First operand 235 states and 315 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:47,535 INFO L93 Difference]: Finished difference Result 234 states and 313 transitions. [2021-11-02 22:27:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:27:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 22:27:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:47,538 INFO L225 Difference]: With dead ends: 234 [2021-11-02 22:27:47,538 INFO L226 Difference]: Without dead ends: 234 [2021-11-02 22:27:47,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-02 22:27:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2021-11-02 22:27:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 197 states have (on average 1.5736040609137056) internal successors, (310), 230 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 313 transitions. [2021-11-02 22:27:47,547 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 313 transitions. Word has length 22 [2021-11-02 22:27:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:47,550 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 313 transitions. [2021-11-02 22:27:47,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 313 transitions. [2021-11-02 22:27:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:27:47,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:47,553 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] [2021-11-02 22:27:47,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:27:47,554 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1729592699, now seen corresponding path program 1 times [2021-11-02 22:27:47,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:47,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290301253] [2021-11-02 22:27:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:47,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:47,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:47,689 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 22:27:47,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:47,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290301253] [2021-11-02 22:27:47,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290301253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:47,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:47,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:27:47,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712457353] [2021-11-02 22:27:47,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:27:47,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:27:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:27:47,693 INFO L87 Difference]: Start difference. First operand 234 states and 313 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:48,064 INFO L93 Difference]: Finished difference Result 250 states and 332 transitions. [2021-11-02 22:27:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:27:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-02 22:27:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:48,067 INFO L225 Difference]: With dead ends: 250 [2021-11-02 22:27:48,067 INFO L226 Difference]: Without dead ends: 250 [2021-11-02 22:27:48,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:27:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-02 22:27:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 241. [2021-11-02 22:27:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 204 states have (on average 1.5637254901960784) internal successors, (319), 237 states have internal predecessors, (319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 322 transitions. [2021-11-02 22:27:48,076 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 322 transitions. Word has length 23 [2021-11-02 22:27:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:48,076 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 322 transitions. [2021-11-02 22:27:48,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 322 transitions. [2021-11-02 22:27:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:27:48,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:48,077 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] [2021-11-02 22:27:48,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:27:48,077 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1729777397, now seen corresponding path program 1 times [2021-11-02 22:27:48,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:48,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814115509] [2021-11-02 22:27:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:48,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:48,225 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 22:27:48,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:48,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814115509] [2021-11-02 22:27:48,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814115509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:48,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:48,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:27:48,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546304143] [2021-11-02 22:27:48,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:27:48,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:27:48,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:48,231 INFO L87 Difference]: Start difference. First operand 241 states and 322 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:48,902 INFO L93 Difference]: Finished difference Result 348 states and 432 transitions. [2021-11-02 22:27:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:27:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-02 22:27:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:48,906 INFO L225 Difference]: With dead ends: 348 [2021-11-02 22:27:48,906 INFO L226 Difference]: Without dead ends: 348 [2021-11-02 22:27:48,906 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:27:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-02 22:27:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 298. [2021-11-02 22:27:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 261 states have (on average 1.5363984674329503) internal successors, (401), 294 states have internal predecessors, (401), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 404 transitions. [2021-11-02 22:27:48,920 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 404 transitions. Word has length 23 [2021-11-02 22:27:48,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:48,920 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 404 transitions. [2021-11-02 22:27:48,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 404 transitions. [2021-11-02 22:27:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:27:48,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:48,921 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:48,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:27:48,922 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:48,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1454633508, now seen corresponding path program 1 times [2021-11-02 22:27:48,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:48,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761300894] [2021-11-02 22:27:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:48,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:48,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:48,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:48,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761300894] [2021-11-02 22:27:48,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761300894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:48,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:48,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:27:48,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113060673] [2021-11-02 22:27:48,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:27:48,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:27:49,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:27:49,003 INFO L87 Difference]: Start difference. First operand 298 states and 404 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:49,166 INFO L93 Difference]: Finished difference Result 273 states and 353 transitions. [2021-11-02 22:27:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:27:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 22:27:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:49,169 INFO L225 Difference]: With dead ends: 273 [2021-11-02 22:27:49,169 INFO L226 Difference]: Without dead ends: 273 [2021-11-02 22:27:49,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 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 22:27:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-02 22:27:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 271. [2021-11-02 22:27:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 234 states have (on average 1.4957264957264957) internal successors, (350), 267 states have internal predecessors, (350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2021-11-02 22:27:49,179 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 24 [2021-11-02 22:27:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:49,179 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2021-11-02 22:27:49,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2021-11-02 22:27:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:27:49,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:49,180 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] [2021-11-02 22:27:49,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:27:49,181 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2143966202, now seen corresponding path program 1 times [2021-11-02 22:27:49,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:49,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363635078] [2021-11-02 22:27:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:49,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:49,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:49,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:49,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363635078] [2021-11-02 22:27:49,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363635078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:49,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232036883] [2021-11-02 22:27:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:49,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:49,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:49,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:27:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:27:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:49,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232036883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:49,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:49,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-02 22:27:49,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744360970] [2021-11-02 22:27:49,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:49,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:49,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:49,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:49,850 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:50,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:50,104 INFO L93 Difference]: Finished difference Result 284 states and 366 transitions. [2021-11-02 22:27:50,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:27:50,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-02 22:27:50,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:50,107 INFO L225 Difference]: With dead ends: 284 [2021-11-02 22:27:50,107 INFO L226 Difference]: Without dead ends: 268 [2021-11-02 22:27:50,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:27:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-11-02 22:27:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2021-11-02 22:27:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 229 states have (on average 1.502183406113537) internal successors, (344), 262 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 347 transitions. [2021-11-02 22:27:50,117 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 347 transitions. Word has length 25 [2021-11-02 22:27:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:50,118 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 347 transitions. [2021-11-02 22:27:50,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 347 transitions. [2021-11-02 22:27:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:27:50,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:50,119 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] [2021-11-02 22:27:50,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:27:50,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:27:50,334 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1281829981, now seen corresponding path program 1 times [2021-11-02 22:27:50,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:50,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269415273] [2021-11-02 22:27:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:50,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:50,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:50,477 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 22:27:50,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:50,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269415273] [2021-11-02 22:27:50,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269415273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:50,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:50,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:27:50,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373714178] [2021-11-02 22:27:50,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:50,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:50,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:50,481 INFO L87 Difference]: Start difference. First operand 266 states and 347 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:50,935 INFO L93 Difference]: Finished difference Result 267 states and 346 transitions. [2021-11-02 22:27:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:27:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-02 22:27:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:50,938 INFO L225 Difference]: With dead ends: 267 [2021-11-02 22:27:50,938 INFO L226 Difference]: Without dead ends: 267 [2021-11-02 22:27:50,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:27:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-02 22:27:50,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2021-11-02 22:27:50,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 229 states have (on average 1.4890829694323144) internal successors, (341), 261 states have internal predecessors, (341), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 344 transitions. [2021-11-02 22:27:50,946 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 344 transitions. Word has length 25 [2021-11-02 22:27:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:50,947 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 344 transitions. [2021-11-02 22:27:50,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 344 transitions. [2021-11-02 22:27:50,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:27:50,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:50,948 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] [2021-11-02 22:27:50,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:27:50,948 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:50,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1281829980, now seen corresponding path program 1 times [2021-11-02 22:27:50,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:50,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691798020] [2021-11-02 22:27:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:50,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:51,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:51,096 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 22:27:51,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:51,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691798020] [2021-11-02 22:27:51,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691798020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:51,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:51,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:27:51,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442272412] [2021-11-02 22:27:51,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:51,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:51,098 INFO L87 Difference]: Start difference. First operand 265 states and 344 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:51,726 INFO L93 Difference]: Finished difference Result 266 states and 343 transitions. [2021-11-02 22:27:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:27:51,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-02 22:27:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:51,728 INFO L225 Difference]: With dead ends: 266 [2021-11-02 22:27:51,728 INFO L226 Difference]: Without dead ends: 266 [2021-11-02 22:27:51,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:27:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-02 22:27:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2021-11-02 22:27:51,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 229 states have (on average 1.4759825327510918) internal successors, (338), 260 states have internal predecessors, (338), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 341 transitions. [2021-11-02 22:27:51,735 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 341 transitions. Word has length 25 [2021-11-02 22:27:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:51,735 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 341 transitions. [2021-11-02 22:27:51,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 341 transitions. [2021-11-02 22:27:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:27:51,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:51,736 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] [2021-11-02 22:27:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:27:51,736 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1115807965, now seen corresponding path program 1 times [2021-11-02 22:27:51,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:51,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284757128] [2021-11-02 22:27:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:51,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:51,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:51,852 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 22:27:51,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:51,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284757128] [2021-11-02 22:27:51,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284757128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:51,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:51,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:27:51,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793002064] [2021-11-02 22:27:51,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:27:51,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:27:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:51,855 INFO L87 Difference]: Start difference. First operand 264 states and 341 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:52,269 INFO L93 Difference]: Finished difference Result 330 states and 424 transitions. [2021-11-02 22:27:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:27:52,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:27:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:52,272 INFO L225 Difference]: With dead ends: 330 [2021-11-02 22:27:52,272 INFO L226 Difference]: Without dead ends: 330 [2021-11-02 22:27:52,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:27:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-02 22:27:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 275. [2021-11-02 22:27:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 240 states have (on average 1.4583333333333333) internal successors, (350), 271 states have internal predecessors, (350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 353 transitions. [2021-11-02 22:27:52,282 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 353 transitions. Word has length 26 [2021-11-02 22:27:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:52,282 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 353 transitions. [2021-11-02 22:27:52,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 353 transitions. [2021-11-02 22:27:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:27:52,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:52,283 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] [2021-11-02 22:27:52,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-02 22:27:52,283 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:52,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1508834975, now seen corresponding path program 1 times [2021-11-02 22:27:52,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:52,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936640338] [2021-11-02 22:27:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:52,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:52,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:52,374 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 22:27:52,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:52,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936640338] [2021-11-02 22:27:52,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936640338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:52,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:52,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:27:52,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798309588] [2021-11-02 22:27:52,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:27:52,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:27:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:52,376 INFO L87 Difference]: Start difference. First operand 275 states and 353 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:52,682 INFO L93 Difference]: Finished difference Result 274 states and 351 transitions. [2021-11-02 22:27:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:27:52,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:27:52,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:52,685 INFO L225 Difference]: With dead ends: 274 [2021-11-02 22:27:52,685 INFO L226 Difference]: Without dead ends: 274 [2021-11-02 22:27:52,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-02 22:27:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2021-11-02 22:27:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 240 states have (on average 1.45) internal successors, (348), 270 states have internal predecessors, (348), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 351 transitions. [2021-11-02 22:27:52,695 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 351 transitions. Word has length 26 [2021-11-02 22:27:52,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:52,695 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 351 transitions. [2021-11-02 22:27:52,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 351 transitions. [2021-11-02 22:27:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:27:52,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:52,696 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] [2021-11-02 22:27:52,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:27:52,696 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:52,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1508834974, now seen corresponding path program 1 times [2021-11-02 22:27:52,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:52,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695732017] [2021-11-02 22:27:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:52,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:52,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:52,764 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 22:27:52,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:52,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695732017] [2021-11-02 22:27:52,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695732017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:52,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:52,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:27:52,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123436099] [2021-11-02 22:27:52,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:27:52,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:52,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:27:52,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:27:52,766 INFO L87 Difference]: Start difference. First operand 274 states and 351 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:53,028 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2021-11-02 22:27:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:27:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:27:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:53,030 INFO L225 Difference]: With dead ends: 273 [2021-11-02 22:27:53,030 INFO L226 Difference]: Without dead ends: 273 [2021-11-02 22:27:53,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:27:53,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-02 22:27:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-11-02 22:27:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 240 states have (on average 1.4416666666666667) internal successors, (346), 269 states have internal predecessors, (346), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 349 transitions. [2021-11-02 22:27:53,043 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 349 transitions. Word has length 26 [2021-11-02 22:27:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:53,043 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 349 transitions. [2021-11-02 22:27:53,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 349 transitions. [2021-11-02 22:27:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:27:53,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:53,044 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] [2021-11-02 22:27:53,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:27:53,044 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:53,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1424911160, now seen corresponding path program 1 times [2021-11-02 22:27:53,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:53,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540657492] [2021-11-02 22:27:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:53,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:53,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:53,172 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 22:27:53,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:53,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540657492] [2021-11-02 22:27:53,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540657492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:53,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:53,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:27:53,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959302468] [2021-11-02 22:27:53,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:53,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:53,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:53,174 INFO L87 Difference]: Start difference. First operand 273 states and 349 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:53,566 INFO L93 Difference]: Finished difference Result 274 states and 350 transitions. [2021-11-02 22:27:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:27:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-02 22:27:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:53,568 INFO L225 Difference]: With dead ends: 274 [2021-11-02 22:27:53,568 INFO L226 Difference]: Without dead ends: 274 [2021-11-02 22:27:53,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:27:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-02 22:27:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 272. [2021-11-02 22:27:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 240 states have (on average 1.4375) internal successors, (345), 268 states have internal predecessors, (345), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 348 transitions. [2021-11-02 22:27:53,578 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 348 transitions. Word has length 29 [2021-11-02 22:27:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:53,578 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 348 transitions. [2021-11-02 22:27:53,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 348 transitions. [2021-11-02 22:27:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:27:53,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:53,579 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] [2021-11-02 22:27:53,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:27:53,579 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1424911159, now seen corresponding path program 1 times [2021-11-02 22:27:53,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:53,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739552089] [2021-11-02 22:27:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:53,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:53,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:53,739 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 22:27:53,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:53,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739552089] [2021-11-02 22:27:53,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739552089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:27:53,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:27:53,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:27:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724147149] [2021-11-02 22:27:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:27:53,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:27:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:27:53,741 INFO L87 Difference]: Start difference. First operand 272 states and 348 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:27:54,264 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2021-11-02 22:27:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:27:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-11-02 22:27:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:27:54,267 INFO L225 Difference]: With dead ends: 273 [2021-11-02 22:27:54,267 INFO L226 Difference]: Without dead ends: 273 [2021-11-02 22:27:54,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:27:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-02 22:27:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 271. [2021-11-02 22:27:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 240 states have (on average 1.4333333333333333) internal successors, (344), 267 states have internal predecessors, (344), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 347 transitions. [2021-11-02 22:27:54,283 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 347 transitions. Word has length 29 [2021-11-02 22:27:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:27:54,284 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 347 transitions. [2021-11-02 22:27:54,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:27:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 347 transitions. [2021-11-02 22:27:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:27:54,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:27:54,286 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:27:54,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-02 22:27:54,286 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:27:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:27:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1058002085, now seen corresponding path program 1 times [2021-11-02 22:27:54,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:27:54,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986888551] [2021-11-02 22:27:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:54,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:27:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:54,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:27:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:54,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:27:54,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986888551] [2021-11-02 22:27:54,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986888551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:54,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717857246] [2021-11-02 22:27:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:27:54,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:27:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:27:54,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:27:54,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:27:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:27:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:27:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:27:55,171 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:27:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:27:55,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:27:55,359 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:27:55,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-02 22:27:55,559 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:27:55,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 39 [2021-11-02 22:27:55,953 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:27:55,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 19 [2021-11-02 22:27:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:27:55,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717857246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:27:55,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:27:55,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-02 22:27:55,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549278810] [2021-11-02 22:27:55,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:27:55,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:27:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:27:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:27:55,964 INFO L87 Difference]: Start difference. First operand 271 states and 347 transitions. Second operand has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:51,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:51,060 INFO L93 Difference]: Finished difference Result 456 states and 579 transitions. [2021-11-02 22:28:51,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:28:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:28:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:51,063 INFO L225 Difference]: With dead ends: 456 [2021-11-02 22:28:51,063 INFO L226 Difference]: Without dead ends: 456 [2021-11-02 22:28:51,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=346, Invalid=1192, Unknown=22, NotChecked=0, Total=1560 [2021-11-02 22:28:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-02 22:28:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 323. [2021-11-02 22:28:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.4417808219178083) internal successors, (421), 319 states have internal predecessors, (421), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 424 transitions. [2021-11-02 22:28:51,077 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 424 transitions. Word has length 42 [2021-11-02 22:28:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:51,078 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 424 transitions. [2021-11-02 22:28:51,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:51,079 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 424 transitions. [2021-11-02 22:28:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:28:51,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:51,080 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:51,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:51,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:51,298 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:28:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:51,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1058002084, now seen corresponding path program 1 times [2021-11-02 22:28:51,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:51,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351832909] [2021-11-02 22:28:51,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:51,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:51,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:28:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:51,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:51,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351832909] [2021-11-02 22:28:51,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351832909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:51,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239667481] [2021-11-02 22:28:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:51,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:51,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:51,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:28:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 22:28:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:28:52,306 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:28:52,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:28:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:28:52,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:28:52,594 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:28:52,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-11-02 22:28:52,624 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-02 22:28:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2021-11-02 22:28:52,958 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:28:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 75 [2021-11-02 22:28:53,007 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 22:28:53,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 84 [2021-11-02 22:28:53,997 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:28:53,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 51 [2021-11-02 22:28:54,006 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:28:54,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 24 [2021-11-02 22:28:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:54,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239667481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:54,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:28:54,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-02 22:28:54,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443651088] [2021-11-02 22:28:54,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:28:54,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:28:54,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:28:54,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:28:54,114 INFO L87 Difference]: Start difference. First operand 323 states and 424 transitions. Second operand has 26 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:28:58,659 INFO L93 Difference]: Finished difference Result 594 states and 741 transitions. [2021-11-02 22:28:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 22:28:58,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:28:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:28:58,663 INFO L225 Difference]: With dead ends: 594 [2021-11-02 22:28:58,663 INFO L226 Difference]: Without dead ends: 594 [2021-11-02 22:28:58,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=581, Invalid=2389, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:28:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-02 22:28:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 361. [2021-11-02 22:28:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 330 states have (on average 1.415151515151515) internal successors, (467), 357 states have internal predecessors, (467), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 470 transitions. [2021-11-02 22:28:58,678 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 470 transitions. Word has length 42 [2021-11-02 22:28:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:28:58,679 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 470 transitions. [2021-11-02 22:28:58,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:28:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 470 transitions. [2021-11-02 22:28:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:28:58,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:28:58,680 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:28:58,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:28:58,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:28:58,894 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:28:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:28:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1057817387, now seen corresponding path program 1 times [2021-11-02 22:28:58,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:28:58,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646160826] [2021-11-02 22:28:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:58,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:28:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:59,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:28:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:28:59,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:28:59,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646160826] [2021-11-02 22:28:59,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646160826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:28:59,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131772398] [2021-11-02 22:28:59,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:28:59,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:28:59,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:28:59,202 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:28:59,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:28:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:28:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:28:59,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:00,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-02 22:29:00,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-02 22:29:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:00,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131772398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:00,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:00,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-11-02 22:29:00,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882021155] [2021-11-02 22:29:00,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:29:00,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:29:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:29:00,334 INFO L87 Difference]: Start difference. First operand 361 states and 470 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:29:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:01,597 INFO L93 Difference]: Finished difference Result 472 states and 584 transitions. [2021-11-02 22:29:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:29:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:29:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:01,601 INFO L225 Difference]: With dead ends: 472 [2021-11-02 22:29:01,601 INFO L226 Difference]: Without dead ends: 472 [2021-11-02 22:29:01,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:29:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-02 22:29:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 353. [2021-11-02 22:29:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 322 states have (on average 1.3726708074534162) internal successors, (442), 349 states have internal predecessors, (442), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:29:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 445 transitions. [2021-11-02 22:29:01,614 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 445 transitions. Word has length 42 [2021-11-02 22:29:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:01,615 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 445 transitions. [2021-11-02 22:29:01,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:29:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 445 transitions. [2021-11-02 22:29:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:29:01,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:01,617 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:01,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:01,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:29:01,831 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:29:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:01,831 INFO L85 PathProgramCache]: Analyzing trace with hash 433019483, now seen corresponding path program 1 times [2021-11-02 22:29:01,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:01,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112356649] [2021-11-02 22:29:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:01,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:02,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:29:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:02,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:02,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112356649] [2021-11-02 22:29:02,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112356649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:02,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956411058] [2021-11-02 22:29:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:02,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:02,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:02,323 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:02,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:29:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:29:02,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:03,488 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:29:03,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:29:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:29:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:03,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-11-02 22:29:03,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:04,013 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-02 22:29:04,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 66 [2021-11-02 22:29:04,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:04,045 INFO L354 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2021-11-02 22:29:04,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 77 [2021-11-02 22:29:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:04,478 INFO L354 Elim1Store]: treesize reduction 108, result has 18.2 percent of original size [2021-11-02 22:29:04,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 87 [2021-11-02 22:29:04,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:29:04,542 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-02 22:29:04,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 111 treesize of output 110 [2021-11-02 22:29:11,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 26 [2021-11-02 22:29:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956411058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:11,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:11,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-11-02 22:29:11,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710540099] [2021-11-02 22:29:11,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:29:11,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:29:11,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=811, Unknown=3, NotChecked=0, Total=992 [2021-11-02 22:29:11,332 INFO L87 Difference]: Start difference. First operand 353 states and 445 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:29:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:29:41,027 INFO L93 Difference]: Finished difference Result 620 states and 776 transitions. [2021-11-02 22:29:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:29:41,038 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:29:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:29:41,043 INFO L225 Difference]: With dead ends: 620 [2021-11-02 22:29:41,043 INFO L226 Difference]: Without dead ends: 620 [2021-11-02 22:29:41,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=561, Invalid=2079, Unknown=12, NotChecked=0, Total=2652 [2021-11-02 22:29:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-02 22:29:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 387. [2021-11-02 22:29:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 356 states have (on average 1.3651685393258426) internal successors, (486), 383 states have internal predecessors, (486), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:29:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 489 transitions. [2021-11-02 22:29:41,059 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 489 transitions. Word has length 42 [2021-11-02 22:29:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:29:41,059 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 489 transitions. [2021-11-02 22:29:41,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:29:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 489 transitions. [2021-11-02 22:29:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:29:41,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:29:41,061 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:29:41,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:29:41,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:29:41,274 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:29:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:29:41,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1960124730, now seen corresponding path program 1 times [2021-11-02 22:29:41,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:29:41,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421426223] [2021-11-02 22:29:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:41,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:29:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:41,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:29:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:41,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:29:41,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421426223] [2021-11-02 22:29:41,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421426223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:41,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685831364] [2021-11-02 22:29:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:29:41,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:29:41,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:29:41,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:29:41,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:29:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:29:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:29:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:29:42,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:29:42,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:29:42,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:29:42,489 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:29:42,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-02 22:29:42,710 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:29:42,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 39 [2021-11-02 22:29:43,231 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:29:43,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 19 [2021-11-02 22:29:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:29:43,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685831364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:29:43,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:29:43,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-02 22:29:43,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425593873] [2021-11-02 22:29:43,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:29:43,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:29:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:29:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:29:43,246 INFO L87 Difference]: Start difference. First operand 387 states and 489 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:39,167 INFO L93 Difference]: Finished difference Result 577 states and 716 transitions. [2021-11-02 22:30:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:30:39,168 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-02 22:30:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:39,171 INFO L225 Difference]: With dead ends: 577 [2021-11-02 22:30:39,172 INFO L226 Difference]: Without dead ends: 577 [2021-11-02 22:30:39,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 45.3s TimeCoverageRelationStatistics Valid=346, Invalid=1192, Unknown=22, NotChecked=0, Total=1560 [2021-11-02 22:30:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-02 22:30:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 451. [2021-11-02 22:30:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 420 states have (on average 1.3523809523809525) internal successors, (568), 447 states have internal predecessors, (568), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 571 transitions. [2021-11-02 22:30:39,188 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 571 transitions. Word has length 43 [2021-11-02 22:30:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:39,189 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 571 transitions. [2021-11-02 22:30:39,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 23 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 571 transitions. [2021-11-02 22:30:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:30:39,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:39,190 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:39,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:39,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:39,414 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:30:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1960124731, now seen corresponding path program 1 times [2021-11-02 22:30:39,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:39,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180084151] [2021-11-02 22:30:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:39,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:39,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:30:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:39,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:39,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180084151] [2021-11-02 22:30:39,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180084151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:39,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066499261] [2021-11-02 22:30:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:39,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:39,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:39,902 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:39,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:30:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:30:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:40,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:30:40,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:30:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:30:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:30:41,033 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:30:41,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 40 [2021-11-02 22:30:41,050 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-02 22:30:41,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2021-11-02 22:30:41,355 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:30:41,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 75 [2021-11-02 22:30:41,386 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 22:30:41,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 84 [2021-11-02 22:30:42,286 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:30:42,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 51 [2021-11-02 22:30:42,293 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-02 22:30:42,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 24 [2021-11-02 22:30:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:42,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066499261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:42,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:42,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-02 22:30:42,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242447712] [2021-11-02 22:30:42,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:30:42,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:30:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:30:42,377 INFO L87 Difference]: Start difference. First operand 451 states and 571 transitions. Second operand has 26 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:45,984 INFO L93 Difference]: Finished difference Result 688 states and 847 transitions. [2021-11-02 22:30:45,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:30:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-02 22:30:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:45,988 INFO L225 Difference]: With dead ends: 688 [2021-11-02 22:30:45,988 INFO L226 Difference]: Without dead ends: 688 [2021-11-02 22:30:45,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=565, Invalid=2297, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:30:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-11-02 22:30:46,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 476. [2021-11-02 22:30:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 445 states have (on average 1.3730337078651684) internal successors, (611), 472 states have internal predecessors, (611), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:46,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 614 transitions. [2021-11-02 22:30:46,007 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 614 transitions. Word has length 43 [2021-11-02 22:30:46,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:46,007 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 614 transitions. [2021-11-02 22:30:46,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 614 transitions. [2021-11-02 22:30:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:30:46,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:46,009 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:46,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:30:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:46,232 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:30:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1960309428, now seen corresponding path program 1 times [2021-11-02 22:30:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:46,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397419948] [2021-11-02 22:30:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:46,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:46,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:30:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:30:46,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:46,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397419948] [2021-11-02 22:30:46,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397419948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:46,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:46,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:30:46,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854311916] [2021-11-02 22:30:46,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:30:46,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:30:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:30:46,382 INFO L87 Difference]: Start difference. First operand 476 states and 614 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:46,730 INFO L93 Difference]: Finished difference Result 477 states and 608 transitions. [2021-11-02 22:30:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:30:46,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-02 22:30:46,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:46,734 INFO L225 Difference]: With dead ends: 477 [2021-11-02 22:30:46,735 INFO L226 Difference]: Without dead ends: 477 [2021-11-02 22:30:46,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:30:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-02 22:30:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 476. [2021-11-02 22:30:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 445 states have (on average 1.3595505617977528) internal successors, (605), 472 states have internal predecessors, (605), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 608 transitions. [2021-11-02 22:30:46,748 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 608 transitions. Word has length 43 [2021-11-02 22:30:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:46,749 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 608 transitions. [2021-11-02 22:30:46,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 608 transitions. [2021-11-02 22:30:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:30:46,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:46,750 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:30:46,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-02 22:30:46,751 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:30:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash 937153082, now seen corresponding path program 1 times [2021-11-02 22:30:46,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:46,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667122863] [2021-11-02 22:30:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:46,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:47,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:30:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:47,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:47,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667122863] [2021-11-02 22:30:47,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667122863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:30:47,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:30:47,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-02 22:30:47,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136918741] [2021-11-02 22:30:47,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:30:47,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:47,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:30:47,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:30:47,227 INFO L87 Difference]: Start difference. First operand 476 states and 608 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:30:48,387 INFO L93 Difference]: Finished difference Result 590 states and 730 transitions. [2021-11-02 22:30:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:30:48,388 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-02 22:30:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:30:48,391 INFO L225 Difference]: With dead ends: 590 [2021-11-02 22:30:48,391 INFO L226 Difference]: Without dead ends: 590 [2021-11-02 22:30:48,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:30:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-02 22:30:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 489. [2021-11-02 22:30:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 458 states have (on average 1.3799126637554586) internal successors, (632), 485 states have internal predecessors, (632), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 635 transitions. [2021-11-02 22:30:48,408 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 635 transitions. Word has length 43 [2021-11-02 22:30:48,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:30:48,408 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 635 transitions. [2021-11-02 22:30:48,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:30:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 635 transitions. [2021-11-02 22:30:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:30:48,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:30:48,410 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:30:48,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-02 22:30:48,410 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:30:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:30:48,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1259165831, now seen corresponding path program 1 times [2021-11-02 22:30:48,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:30:48,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448931967] [2021-11-02 22:30:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:48,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:30:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:48,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:30:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:48,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:30:48,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448931967] [2021-11-02 22:30:48,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448931967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:48,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495785878] [2021-11-02 22:30:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:30:48,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:30:48,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:30:48,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:30:48,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:30:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:30:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:30:49,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:30:49,852 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:30:49,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:30:49,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-02 22:30:50,073 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:30:50,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-02 22:30:50,288 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-02 22:30:50,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 41 [2021-11-02 22:30:57,005 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-02 22:30:57,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 36 [2021-11-02 22:30:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:30:57,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495785878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:30:57,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:30:57,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-02 22:30:57,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299101706] [2021-11-02 22:30:57,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:30:57,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:30:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:30:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=581, Unknown=3, NotChecked=0, Total=702 [2021-11-02 22:30:57,140 INFO L87 Difference]: Start difference. First operand 489 states and 635 transitions. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:31:51,850 INFO L93 Difference]: Finished difference Result 825 states and 1055 transitions. [2021-11-02 22:31:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:31:51,851 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-02 22:31:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:31:51,856 INFO L225 Difference]: With dead ends: 825 [2021-11-02 22:31:51,857 INFO L226 Difference]: Without dead ends: 825 [2021-11-02 22:31:51,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=442, Invalid=1511, Unknown=27, NotChecked=0, Total=1980 [2021-11-02 22:31:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-02 22:31:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 614. [2021-11-02 22:31:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 583 states have (on average 1.3704974271012007) internal successors, (799), 610 states have internal predecessors, (799), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 802 transitions. [2021-11-02 22:31:51,878 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 802 transitions. Word has length 45 [2021-11-02 22:31:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:31:51,878 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 802 transitions. [2021-11-02 22:31:51,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:31:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 802 transitions. [2021-11-02 22:31:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:31:51,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:31:51,880 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:31:51,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:31:52,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:52,106 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:31:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:31:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1259165830, now seen corresponding path program 1 times [2021-11-02 22:31:52,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:31:52,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697027261] [2021-11-02 22:31:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:52,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:31:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:52,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:31:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:52,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:31:52,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697027261] [2021-11-02 22:31:52,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697027261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:52,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523755821] [2021-11-02 22:31:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:31:52,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:31:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:31:52,690 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:31:52,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:31:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:31:53,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:31:53,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:31:53,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:31:53,674 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:31:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:31:53,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-02 22:31:53,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:31:53,947 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:31:53,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-02 22:31:53,965 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:31:53,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-11-02 22:31:54,217 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-02 22:31:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 86 [2021-11-02 22:31:54,254 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-02 22:31:54,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 109 [2021-11-02 22:31:55,777 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-02 22:31:55,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 68 [2021-11-02 22:31:55,798 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-02 22:31:55,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-11-02 22:31:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:31:55,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523755821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:31:55,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:31:55,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-02 22:31:55,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857400829] [2021-11-02 22:31:55,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 22:31:55,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:31:55,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 22:31:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:31:55,826 INFO L87 Difference]: Start difference. First operand 614 states and 802 transitions. Second operand has 26 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:03,545 INFO L93 Difference]: Finished difference Result 797 states and 1014 transitions. [2021-11-02 22:32:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:32:03,545 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-02 22:32:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:03,550 INFO L225 Difference]: With dead ends: 797 [2021-11-02 22:32:03,550 INFO L226 Difference]: Without dead ends: 797 [2021-11-02 22:32:03,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=364, Invalid=1439, Unknown=3, NotChecked=0, Total=1806 [2021-11-02 22:32:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-11-02 22:32:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 628. [2021-11-02 22:32:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 597 states have (on average 1.3752093802345058) internal successors, (821), 624 states have internal predecessors, (821), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 824 transitions. [2021-11-02 22:32:03,573 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 824 transitions. Word has length 45 [2021-11-02 22:32:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:03,573 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 824 transitions. [2021-11-02 22:32:03,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.24) internal successors, (81), 25 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 824 transitions. [2021-11-02 22:32:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:32:03,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:03,575 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:32:03,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:32:03,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:32:03,790 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:32:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:03,790 INFO L85 PathProgramCache]: Analyzing trace with hash 715680382, now seen corresponding path program 1 times [2021-11-02 22:32:03,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:03,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232013655] [2021-11-02 22:32:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:03,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:04,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:04,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:04,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232013655] [2021-11-02 22:32:04,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232013655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:04,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:04,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:32:04,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817291749] [2021-11-02 22:32:04,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:32:04,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:32:04,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:32:04,118 INFO L87 Difference]: Start difference. First operand 628 states and 824 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:04,940 INFO L93 Difference]: Finished difference Result 873 states and 1119 transitions. [2021-11-02 22:32:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:32:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-02 22:32:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:04,945 INFO L225 Difference]: With dead ends: 873 [2021-11-02 22:32:04,945 INFO L226 Difference]: Without dead ends: 862 [2021-11-02 22:32:04,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:32:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-02 22:32:04,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 637. [2021-11-02 22:32:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 606 states have (on average 1.3696369636963697) internal successors, (830), 633 states have internal predecessors, (830), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 833 transitions. [2021-11-02 22:32:04,965 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 833 transitions. Word has length 47 [2021-11-02 22:32:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:04,966 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 833 transitions. [2021-11-02 22:32:04,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 833 transitions. [2021-11-02 22:32:04,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:32:04,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:04,967 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:32:04,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-02 22:32:04,968 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr55ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:32:04,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1192322178, now seen corresponding path program 1 times [2021-11-02 22:32:04,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:04,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758262155] [2021-11-02 22:32:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:04,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:05,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:05,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:05,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758262155] [2021-11-02 22:32:05,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758262155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:32:05,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:32:05,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-02 22:32:05,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505368875] [2021-11-02 22:32:05,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:32:05,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:05,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:32:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:32:05,378 INFO L87 Difference]: Start difference. First operand 637 states and 833 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:32:06,468 INFO L93 Difference]: Finished difference Result 852 states and 1093 transitions. [2021-11-02 22:32:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:32:06,470 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-02 22:32:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:32:06,473 INFO L225 Difference]: With dead ends: 852 [2021-11-02 22:32:06,474 INFO L226 Difference]: Without dead ends: 852 [2021-11-02 22:32:06,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:32:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-02 22:32:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 637. [2021-11-02 22:32:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 606 states have (on average 1.3663366336633664) internal successors, (828), 633 states have internal predecessors, (828), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 831 transitions. [2021-11-02 22:32:06,494 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 831 transitions. Word has length 47 [2021-11-02 22:32:06,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:32:06,495 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 831 transitions. [2021-11-02 22:32:06,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:32:06,495 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 831 transitions. [2021-11-02 22:32:06,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:32:06,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:32:06,497 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:32:06,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-02 22:32:06,497 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:32:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:32:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash -989501359, now seen corresponding path program 1 times [2021-11-02 22:32:06,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:32:06,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029274038] [2021-11-02 22:32:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:06,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:32:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:07,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:32:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:07,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:32:07,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029274038] [2021-11-02 22:32:07,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029274038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:07,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233527756] [2021-11-02 22:32:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:32:07,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:32:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:32:07,198 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:32:07,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:32:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:32:08,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:32:08,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:32:08,437 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:32:08,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:32:08,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-02 22:32:08,783 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:32:08,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-02 22:32:09,126 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:32:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 43 [2021-11-02 22:32:13,714 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-02 22:32:13,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-02 22:32:13,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:13,870 INFO L354 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2021-11-02 22:32:13,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 61 [2021-11-02 22:32:14,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:14,314 INFO L354 Elim1Store]: treesize reduction 114, result has 18.6 percent of original size [2021-11-02 22:32:14,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 68 [2021-11-02 22:32:14,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:32:14,850 INFO L354 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2021-11-02 22:32:14,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 112 treesize of output 80 [2021-11-02 22:32:21,595 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-02 22:32:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 47 [2021-11-02 22:32:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:32:21,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233527756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:32:21,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:32:21,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 39 [2021-11-02 22:32:21,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939854887] [2021-11-02 22:32:21,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-02 22:32:21,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:32:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-02 22:32:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1244, Unknown=5, NotChecked=0, Total=1560 [2021-11-02 22:32:21,844 INFO L87 Difference]: Start difference. First operand 637 states and 831 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:36:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:23,056 INFO L93 Difference]: Finished difference Result 1837 states and 2349 transitions. [2021-11-02 22:36:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-02 22:36:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:36:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:23,068 INFO L225 Difference]: With dead ends: 1837 [2021-11-02 22:36:23,084 INFO L226 Difference]: Without dead ends: 1837 [2021-11-02 22:36:23,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6790 ImplicationChecksByTransitivity, 197.4s TimeCoverageRelationStatistics Valid=3858, Invalid=16928, Unknown=94, NotChecked=0, Total=20880 [2021-11-02 22:36:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2021-11-02 22:36:23,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 708. [2021-11-02 22:36:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 677 states have (on average 1.3707533234859675) internal successors, (928), 704 states have internal predecessors, (928), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:36:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 931 transitions. [2021-11-02 22:36:23,118 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 931 transitions. Word has length 50 [2021-11-02 22:36:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:23,119 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 931 transitions. [2021-11-02 22:36:23,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:36:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 931 transitions. [2021-11-02 22:36:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:36:23,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:23,121 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:23,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:23,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:36:23,346 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:36:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:23,347 INFO L85 PathProgramCache]: Analyzing trace with hash -989501358, now seen corresponding path program 1 times [2021-11-02 22:36:23,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:23,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492400454] [2021-11-02 22:36:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:23,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:23,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:36:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:23,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:36:23,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492400454] [2021-11-02 22:36:23,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492400454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:23,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319414582] [2021-11-02 22:36:23,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:23,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:36:23,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,962 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:36:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 22:36:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:25,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:36:25,059 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:36:25,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:36:25,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:36:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-02 22:36:25,423 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:36:25,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 54 [2021-11-02 22:36:25,438 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-02 22:36:25,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 67 [2021-11-02 22:36:25,797 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:36:25,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 75 [2021-11-02 22:36:25,824 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 22:36:25,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 96 [2021-11-02 22:36:32,567 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-02 22:36:32,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-02 22:36:32,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:36:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:32,759 INFO L354 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2021-11-02 22:36:32,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 90 [2021-11-02 22:36:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:32,781 INFO L354 Elim1Store]: treesize reduction 65, result has 16.7 percent of original size [2021-11-02 22:36:32,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 109 [2021-11-02 22:36:33,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:33,204 INFO L354 Elim1Store]: treesize reduction 114, result has 18.6 percent of original size [2021-11-02 22:36:33,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 140 treesize of output 95 [2021-11-02 22:36:33,235 INFO L354 Elim1Store]: treesize reduction 108, result has 16.3 percent of original size [2021-11-02 22:36:33,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 126 [2021-11-02 22:36:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:36:33,720 INFO L354 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2021-11-02 22:36:33,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 116 [2021-11-02 22:36:33,767 INFO L354 Elim1Store]: treesize reduction 184, result has 15.6 percent of original size [2021-11-02 22:36:33,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 159 [2021-11-02 22:36:40,800 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-02 22:36:40,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 74 [2021-11-02 22:36:40,807 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-02 22:36:40,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 39 [2021-11-02 22:36:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:40,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319414582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:36:40,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:40,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 38 [2021-11-02 22:36:40,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115647630] [2021-11-02 22:36:40,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:36:40,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:36:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:36:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1233, Unknown=5, NotChecked=0, Total=1482 [2021-11-02 22:36:40,990 INFO L87 Difference]: Start difference. First operand 708 states and 931 transitions. Second operand has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:37:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:37:00,271 INFO L93 Difference]: Finished difference Result 1796 states and 2299 transitions. [2021-11-02 22:37:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-02 22:37:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:37:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:37:00,279 INFO L225 Difference]: With dead ends: 1796 [2021-11-02 22:37:00,279 INFO L226 Difference]: Without dead ends: 1796 [2021-11-02 22:37:00,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4976 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=2449, Invalid=12798, Unknown=5, NotChecked=0, Total=15252 [2021-11-02 22:37:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2021-11-02 22:37:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 728. [2021-11-02 22:37:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 697 states have (on average 1.3687230989956958) internal successors, (954), 724 states have internal predecessors, (954), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:37:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 957 transitions. [2021-11-02 22:37:00,314 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 957 transitions. Word has length 50 [2021-11-02 22:37:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:37:00,315 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 957 transitions. [2021-11-02 22:37:00,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:37:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 957 transitions. [2021-11-02 22:37:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:37:00,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:37:00,316 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:37:00,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:37:00,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:37:00,542 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:37:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:37:00,542 INFO L85 PathProgramCache]: Analyzing trace with hash -989316661, now seen corresponding path program 1 times [2021-11-02 22:37:00,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:37:00,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312903362] [2021-11-02 22:37:00,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:37:00,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:37:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:00,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:37:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:37:00,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:37:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312903362] [2021-11-02 22:37:00,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312903362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215902042] [2021-11-02 22:37:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:37:00,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:37:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:37:00,965 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:37:00,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:37:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:37:02,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:37:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:37:02,469 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:37:02,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:37:02,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-02 22:37:02,707 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:37:02,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-02 22:37:02,907 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-02 22:37:02,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 41 [2021-11-02 22:37:09,508 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-02 22:37:09,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 36 [2021-11-02 22:37:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:37:09,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215902042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:37:09,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:37:09,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-02 22:37:09,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608668521] [2021-11-02 22:37:09,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:37:09,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:37:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:37:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=581, Unknown=3, NotChecked=0, Total=702 [2021-11-02 22:37:09,599 INFO L87 Difference]: Start difference. First operand 728 states and 957 transitions. Second operand has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:06,914 INFO L93 Difference]: Finished difference Result 976 states and 1261 transitions. [2021-11-02 22:38:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:38:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:38:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:06,919 INFO L225 Difference]: With dead ends: 976 [2021-11-02 22:38:06,919 INFO L226 Difference]: Without dead ends: 976 [2021-11-02 22:38:06,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=409, Invalid=1373, Unknown=24, NotChecked=0, Total=1806 [2021-11-02 22:38:06,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-11-02 22:38:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 733. [2021-11-02 22:38:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 702 states have (on average 1.368945868945869) internal successors, (961), 729 states have internal predecessors, (961), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 964 transitions. [2021-11-02 22:38:06,937 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 964 transitions. Word has length 50 [2021-11-02 22:38:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:06,937 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 964 transitions. [2021-11-02 22:38:06,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 964 transitions. [2021-11-02 22:38:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:38:06,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:06,939 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:38:06,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:38:07,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:38:07,165 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:38:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash -989316660, now seen corresponding path program 1 times [2021-11-02 22:38:07,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:07,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256719620] [2021-11-02 22:38:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:07,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:38:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:07,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:07,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256719620] [2021-11-02 22:38:07,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256719620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:07,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138676757] [2021-11-02 22:38:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:07,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:07,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:07,718 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:38:07,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:38:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:38:09,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:38:09,499 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:38:09,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:38:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:38:09,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:38:09,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-02 22:38:09,684 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:38:09,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-02 22:38:09,701 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:38:09,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2021-11-02 22:38:09,972 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:38:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 80 [2021-11-02 22:38:10,002 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 22:38:10,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 93 [2021-11-02 22:38:10,825 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-02 22:38:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 67 [2021-11-02 22:38:10,845 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-02 22:38:10,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-11-02 22:38:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:10,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138676757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:10,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:38:10,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2021-11-02 22:38:10,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078365513] [2021-11-02 22:38:10,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:38:10,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:10,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:38:10,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:38:10,863 INFO L87 Difference]: Start difference. First operand 733 states and 964 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:13,383 INFO L93 Difference]: Finished difference Result 949 states and 1225 transitions. [2021-11-02 22:38:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:38:13,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:38:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:13,391 INFO L225 Difference]: With dead ends: 949 [2021-11-02 22:38:13,391 INFO L226 Difference]: Without dead ends: 949 [2021-11-02 22:38:13,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:38:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-11-02 22:38:13,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 752. [2021-11-02 22:38:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 721 states have (on average 1.3661581137309293) internal successors, (985), 748 states have internal predecessors, (985), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 988 transitions. [2021-11-02 22:38:13,429 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 988 transitions. Word has length 50 [2021-11-02 22:38:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:13,429 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 988 transitions. [2021-11-02 22:38:13,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 988 transitions. [2021-11-02 22:38:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:38:13,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:13,431 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:38:13,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:38:13,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:13,658 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:38:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1134684594, now seen corresponding path program 1 times [2021-11-02 22:38:13,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:13,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958028650] [2021-11-02 22:38:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:13,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:13,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:38:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:13,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:13,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958028650] [2021-11-02 22:38:13,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958028650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:13,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602933636] [2021-11-02 22:38:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:13,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:13,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:13,802 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:38:13,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:38:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:15,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:38:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:38:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:15,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602933636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:15,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:38:15,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-11-02 22:38:15,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889003464] [2021-11-02 22:38:15,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:38:15,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:15,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:38:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:38:15,676 INFO L87 Difference]: Start difference. First operand 752 states and 988 transitions. Second operand has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:16,059 INFO L93 Difference]: Finished difference Result 788 states and 1012 transitions. [2021-11-02 22:38:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:38:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:38:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:16,064 INFO L225 Difference]: With dead ends: 788 [2021-11-02 22:38:16,064 INFO L226 Difference]: Without dead ends: 788 [2021-11-02 22:38:16,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:38:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-11-02 22:38:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 749. [2021-11-02 22:38:16,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 721 states have (on average 1.3411927877947296) internal successors, (967), 745 states have internal predecessors, (967), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 970 transitions. [2021-11-02 22:38:16,079 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 970 transitions. Word has length 50 [2021-11-02 22:38:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:16,080 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 970 transitions. [2021-11-02 22:38:16,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 970 transitions. [2021-11-02 22:38:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:38:16,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:16,082 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:38:16,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:38:16,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:16,297 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:38:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:16,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1134684593, now seen corresponding path program 1 times [2021-11-02 22:38:16,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:16,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449737838] [2021-11-02 22:38:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:16,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:16,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:38:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:38:16,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:16,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449737838] [2021-11-02 22:38:16,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449737838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:16,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516808850] [2021-11-02 22:38:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:16,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:16,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:16,497 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:38:16,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:38:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:38:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:38:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:18,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516808850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:18,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:38:18,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-02 22:38:18,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493314610] [2021-11-02 22:38:18,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:38:18,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:38:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:38:18,615 INFO L87 Difference]: Start difference. First operand 749 states and 970 transitions. Second operand has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:38:19,478 INFO L93 Difference]: Finished difference Result 854 states and 1089 transitions. [2021-11-02 22:38:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:38:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:38:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:38:19,483 INFO L225 Difference]: With dead ends: 854 [2021-11-02 22:38:19,484 INFO L226 Difference]: Without dead ends: 854 [2021-11-02 22:38:19,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:38:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-11-02 22:38:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 800. [2021-11-02 22:38:19,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 772 states have (on average 1.33419689119171) internal successors, (1030), 796 states have internal predecessors, (1030), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1033 transitions. [2021-11-02 22:38:19,502 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1033 transitions. Word has length 50 [2021-11-02 22:38:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:38:19,502 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1033 transitions. [2021-11-02 22:38:19,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:38:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1033 transitions. [2021-11-02 22:38:19,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:38:19,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:38:19,504 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:38:19,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:38:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 22:38:19,730 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 51 more)] === [2021-11-02 22:38:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:38:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash -211320060, now seen corresponding path program 1 times [2021-11-02 22:38:19,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:38:19,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267603932] [2021-11-02 22:38:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:19,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:38:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:20,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:38:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:20,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:38:20,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267603932] [2021-11-02 22:38:20,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267603932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:20,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507084600] [2021-11-02 22:38:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:38:20,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:38:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:38:20,270 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:38:20,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79075162-f98a-4d2a-af79-f9986227d696/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:38:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:38:21,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:38:21,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:38:21,781 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:38:21,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-02 22:38:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-02 22:38:22,059 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:38:22,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-02 22:38:22,324 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:38:22,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 43 [2021-11-02 22:38:26,935 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-02 22:38:26,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-02 22:38:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:27,167 INFO L354 Elim1Store]: treesize reduction 65, result has 12.2 percent of original size [2021-11-02 22:38:27,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 61 [2021-11-02 22:38:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:27,674 INFO L354 Elim1Store]: treesize reduction 114, result has 18.6 percent of original size [2021-11-02 22:38:27,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 68 [2021-11-02 22:38:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:38:28,101 INFO L354 Elim1Store]: treesize reduction 186, result has 15.1 percent of original size [2021-11-02 22:38:28,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 112 treesize of output 80 [2021-11-02 22:38:34,845 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-02 22:38:34,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 47 [2021-11-02 22:38:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:38:35,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507084600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:38:35,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:38:35,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22] total 38 [2021-11-02 22:38:35,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357912171] [2021-11-02 22:38:35,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-02 22:38:35,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:38:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-02 22:38:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1183, Unknown=5, NotChecked=0, Total=1482 [2021-11-02 22:38:35,047 INFO L87 Difference]: Start difference. First operand 800 states and 1033 transitions. Second operand has 39 states, 38 states have (on average 2.5) internal successors, (95), 38 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)