./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3 --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 dd713315a01a83d82c28c42f2ad6c72c3349a374 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:01:42,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:01:42,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:01:42,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:01:42,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:01:42,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:01:42,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:01:42,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:01:42,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:01:42,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:01:42,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:01:42,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:01:42,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:01:42,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:01:42,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:01:42,817 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:01:42,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:01:42,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:01:42,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:01:42,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:01:42,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:01:42,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:01:42,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:01:42,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:01:42,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:01:42,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:01:42,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:01:42,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:01:42,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:01:42,841 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:01:42,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:01:42,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:01:42,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:01:42,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:01:42,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:01:42,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:01:42,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:01:42,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:01:42,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:01:42,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:01:42,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:01:42,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 20:01:42,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:01:42,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:01:42,882 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:01:42,882 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:01:42,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:01:42,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:01:42,884 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:01:42,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:01:42,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:01:42,885 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 20:01:42,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:01:42,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:01:42,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:01:42,886 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 20:01:42,886 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 20:01:42,887 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 20:01:42,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:01:42,887 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 20:01:42,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:01:42,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:01:42,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:01:42,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:01:42,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:01:42,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:01:42,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:01:42,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:01:42,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:01:42,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:01:42,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:01:42,890 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_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd713315a01a83d82c28c42f2ad6c72c3349a374 [2021-10-15 20:01:43,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:01:43,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:01:43,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:01:43,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:01:43,159 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:01:43,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2021-10-15 20:01:43,274 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/data/d6a0a1780/878986b457c749c3bb6c1cc73266e648/FLAGd3ce1b377 [2021-10-15 20:01:43,892 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:01:43,895 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2021-10-15 20:01:43,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/data/d6a0a1780/878986b457c749c3bb6c1cc73266e648/FLAGd3ce1b377 [2021-10-15 20:01:44,191 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/data/d6a0a1780/878986b457c749c3bb6c1cc73266e648 [2021-10-15 20:01:44,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:01:44,195 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 20:01:44,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:01:44,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:01:44,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:01:44,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7439882d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44, skipping insertion in model container [2021-10-15 20:01:44,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:01:44,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:01:44,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:01:44,598 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:01:44,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:01:44,678 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:01:44,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44 WrapperNode [2021-10-15 20:01:44,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:01:44,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:01:44,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:01:44,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:01:44,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:01:44,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:01:44,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:01:44,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:01:44,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (1/1) ... [2021-10-15 20:01:44,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:01:44,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:01:44,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:01:44,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:01:44,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 20:01:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:01:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-15 20:01:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-15 20:01:44,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-15 20:01:44,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-15 20:01:44,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-15 20:01:44,869 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcspn [2021-10-15 20:01:44,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 20:01:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 20:01:44,870 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 20:01:44,871 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 20:01:44,871 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 20:01:44,871 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 20:01:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 20:01:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 20:01:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 20:01:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 20:01:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 20:01:44,872 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 20:01:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 20:01:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 20:01:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 20:01:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 20:01:44,873 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 20:01:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-15 20:01:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-15 20:01:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-15 20:01:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-15 20:01:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-15 20:01:44,874 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 20:01:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 20:01:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 20:01:44,875 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 20:01:44,876 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 20:01:44,876 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 20:01:44,876 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 20:01:44,876 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 20:01:44,876 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 20:01:44,876 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 20:01:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 20:01:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 20:01:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 20:01:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 20:01:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 20:01:44,877 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 20:01:44,878 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 20:01:44,878 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 20:01:44,878 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 20:01:44,879 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 20:01:44,879 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 20:01:44,879 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 20:01:44,879 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 20:01:44,880 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 20:01:44,880 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 20:01:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 20:01:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 20:01:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 20:01:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 20:01:44,881 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 20:01:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 20:01:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 20:01:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 20:01:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 20:01:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 20:01:44,882 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 20:01:44,883 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 20:01:44,883 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 20:01:44,884 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 20:01:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 20:01:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 20:01:44,885 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 20:01:44,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 20:01:44,886 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 20:01:44,886 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 20:01:44,886 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 20:01:44,886 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 20:01:44,886 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 20:01:44,887 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 20:01:44,887 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 20:01:44,887 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 20:01:44,888 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 20:01:44,888 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 20:01:44,888 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 20:01:44,888 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 20:01:44,888 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 20:01:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 20:01:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 20:01:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 20:01:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 20:01:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 20:01:44,889 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 20:01:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 20:01:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 20:01:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 20:01:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 20:01:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 20:01:44,890 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 20:01:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 20:01:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 20:01:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 20:01:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 20:01:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 20:01:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 20:01:44,891 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 20:01:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 20:01:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 20:01:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 20:01:44,892 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 20:01:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 20:01:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 20:01:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 20:01:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 20:01:44,893 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 20:01:44,894 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 20:01:44,895 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 20:01:44,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 20:01:44,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-15 20:01:44,895 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcspn [2021-10-15 20:01:44,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:01:44,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 20:01:44,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:01:44,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:01:44,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:01:44,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 20:01:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:01:45,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:01:45,465 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 20:01:45,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:01:45 BoogieIcfgContainer [2021-10-15 20:01:45,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:01:45,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:01:45,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:01:45,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:01:45,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:01:44" (1/3) ... [2021-10-15 20:01:45,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5015afc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:01:45, skipping insertion in model container [2021-10-15 20:01:45,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:01:44" (2/3) ... [2021-10-15 20:01:45,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5015afc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:01:45, skipping insertion in model container [2021-10-15 20:01:45,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:01:45" (3/3) ... [2021-10-15 20:01:45,484 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2021-10-15 20:01:45,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:01:45,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-15 20:01:45,562 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:01:45,578 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, mConcurrency=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 [2021-10-15 20:01:45,579 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-15 20:01:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-15 20:01:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 20:01:45,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:45,620 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:45,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:45,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1274980559, now seen corresponding path program 1 times [2021-10-15 20:01:45,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:45,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063635565] [2021-10-15 20:01:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:45,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:45,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:45,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:45,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063635565] [2021-10-15 20:01:45,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063635565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:45,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:45,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:01:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362820404] [2021-10-15 20:01:45,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:45,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:45,971 INFO L87 Difference]: Start difference. First operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) 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) [2021-10-15 20:01:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:46,166 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-10-15 20:01:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:01:46,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 [2021-10-15 20:01:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:46,177 INFO L225 Difference]: With dead ends: 83 [2021-10-15 20:01:46,178 INFO L226 Difference]: Without dead ends: 79 [2021-10-15 20:01:46,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:01:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-15 20:01:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-10-15 20:01:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-10-15 20:01:46,238 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-10-15 20:01:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:46,239 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-10-15 20:01:46,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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) [2021-10-15 20:01:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-10-15 20:01:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 20:01:46,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:46,241 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:46,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:01:46,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827601, now seen corresponding path program 1 times [2021-10-15 20:01:46,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:46,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372751852] [2021-10-15 20:01:46,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:46,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:46,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:46,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:46,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372751852] [2021-10-15 20:01:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372751852] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:46,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:46,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:01:46,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606600655] [2021-10-15 20:01:46,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:46,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:46,482 INFO L87 Difference]: Start difference. First operand 62 states and 70 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) [2021-10-15 20:01:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:46,750 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-15 20:01:46,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:01:46,750 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 [2021-10-15 20:01:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:46,757 INFO L225 Difference]: With dead ends: 84 [2021-10-15 20:01:46,758 INFO L226 Difference]: Without dead ends: 84 [2021-10-15 20:01:46,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:46,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-15 20:01:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-10-15 20:01:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.725) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-15 20:01:46,780 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2021-10-15 20:01:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:46,781 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-15 20:01:46,781 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) [2021-10-15 20:01:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-15 20:01:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-15 20:01:46,782 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:46,783 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:46,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:01:46,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827600, now seen corresponding path program 1 times [2021-10-15 20:01:46,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:46,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25140500] [2021-10-15 20:01:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:46,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:46,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:46,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:46,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25140500] [2021-10-15 20:01:46,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25140500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:46,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:46,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:01:46,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080556082] [2021-10-15 20:01:46,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:01:46,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:01:46,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:01:46,908 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-15 20:01:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:47,039 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-15 20:01:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:01:47,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-10-15 20:01:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:47,047 INFO L225 Difference]: With dead ends: 62 [2021-10-15 20:01:47,048 INFO L226 Difference]: Without dead ends: 62 [2021-10-15 20:01:47,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:01:47,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-15 20:01:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-15 20:01:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.65) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-10-15 20:01:47,068 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-10-15 20:01:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:47,070 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-10-15 20:01:47,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-10-15 20:01:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-10-15 20:01:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:01:47,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:47,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:47,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:01:47,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586438, now seen corresponding path program 1 times [2021-10-15 20:01:47,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:47,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941315665] [2021-10-15 20:01:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:47,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:47,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:47,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:47,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941315665] [2021-10-15 20:01:47,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941315665] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:47,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:47,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:01:47,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647043680] [2021-10-15 20:01:47,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:47,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:47,202 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-15 20:01:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:47,340 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-15 20:01:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:01:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-15 20:01:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:47,343 INFO L225 Difference]: With dead ends: 61 [2021-10-15 20:01:47,343 INFO L226 Difference]: Without dead ends: 61 [2021-10-15 20:01:47,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-15 20:01:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-15 20:01:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.625) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-15 20:01:47,350 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-10-15 20:01:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:47,350 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-15 20:01:47,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-15 20:01:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-15 20:01:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:01:47,352 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:47,352 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:47,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:01:47,352 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586490, now seen corresponding path program 1 times [2021-10-15 20:01:47,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:47,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125101876] [2021-10-15 20:01:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:47,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:47,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:47,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:47,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125101876] [2021-10-15 20:01:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125101876] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:47,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:47,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:01:47,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858981128] [2021-10-15 20:01:47,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:47,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:47,469 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-15 20:01:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:47,608 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-10-15 20:01:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:01:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-10-15 20:01:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:47,611 INFO L225 Difference]: With dead ends: 81 [2021-10-15 20:01:47,612 INFO L226 Difference]: Without dead ends: 81 [2021-10-15 20:01:47,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-15 20:01:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-15 20:01:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 66 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-10-15 20:01:47,637 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-10-15 20:01:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:47,637 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-10-15 20:01:47,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-10-15 20:01:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-10-15 20:01:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:01:47,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:47,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:47,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:01:47,639 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:47,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844792, now seen corresponding path program 1 times [2021-10-15 20:01:47,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:47,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938853108] [2021-10-15 20:01:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:47,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:47,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:47,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938853108] [2021-10-15 20:01:47,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938853108] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:47,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:47,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:01:47,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423371462] [2021-10-15 20:01:47,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:01:47,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:01:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:01:47,733 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-10-15 20:01:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:47,834 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-10-15 20:01:47,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:01:47,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-10-15 20:01:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:47,836 INFO L225 Difference]: With dead ends: 70 [2021-10-15 20:01:47,836 INFO L226 Difference]: Without dead ends: 70 [2021-10-15 20:01:47,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:01:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-15 20:01:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-15 20:01:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-10-15 20:01:47,865 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-10-15 20:01:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:47,865 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-10-15 20:01:47,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-10-15 20:01:47,868 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-10-15 20:01:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:01:47,869 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:47,869 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:47,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:01:47,869 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:47,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844793, now seen corresponding path program 1 times [2021-10-15 20:01:47,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:47,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948235542] [2021-10-15 20:01:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:47,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:48,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:48,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:48,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948235542] [2021-10-15 20:01:48,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948235542] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:48,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:48,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:01:48,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771552628] [2021-10-15 20:01:48,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:01:48,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:48,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:01:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:48,019 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-15 20:01:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:48,189 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-10-15 20:01:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:01:48,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-10-15 20:01:48,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:48,191 INFO L225 Difference]: With dead ends: 81 [2021-10-15 20:01:48,191 INFO L226 Difference]: Without dead ends: 81 [2021-10-15 20:01:48,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:01:48,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-15 20:01:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-15 20:01:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-10-15 20:01:48,199 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-10-15 20:01:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:48,200 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-10-15 20:01:48,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-15 20:01:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-10-15 20:01:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-15 20:01:48,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:48,201 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:48,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:01:48,201 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:48,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:48,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1746526086, now seen corresponding path program 1 times [2021-10-15 20:01:48,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:48,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777406366] [2021-10-15 20:01:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:48,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:48,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:48,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:48,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777406366] [2021-10-15 20:01:48,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777406366] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:48,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:48,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:01:48,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105516482] [2021-10-15 20:01:48,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:48,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:48,289 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-15 20:01:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:48,381 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-10-15 20:01:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:01:48,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2021-10-15 20:01:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:48,383 INFO L225 Difference]: With dead ends: 71 [2021-10-15 20:01:48,383 INFO L226 Difference]: Without dead ends: 71 [2021-10-15 20:01:48,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-15 20:01:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-15 20:01:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-10-15 20:01:48,390 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-10-15 20:01:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:48,391 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-10-15 20:01:48,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-15 20:01:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-10-15 20:01:48,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 20:01:48,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:48,394 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:48,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:01:48,395 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:48,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1874075756, now seen corresponding path program 1 times [2021-10-15 20:01:48,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:48,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206791271] [2021-10-15 20:01:48,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:48,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:48,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:48,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:48,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206791271] [2021-10-15 20:01:48,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206791271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:48,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888970482] [2021-10-15 20:01:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:48,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:01:48,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:01:48,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:01:48,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:01:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:48,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:01:48,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:01:48,922 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:01:48,923 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-15 20:01:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 13 [2021-10-15 20:01:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:49,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888970482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:49,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:01:49,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-15 20:01:49,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482546464] [2021-10-15 20:01:49,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:01:49,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:01:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:01:49,073 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-15 20:01:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:49,244 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-10-15 20:01:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:01:49,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 15 [2021-10-15 20:01:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:49,245 INFO L225 Difference]: With dead ends: 90 [2021-10-15 20:01:49,245 INFO L226 Difference]: Without dead ends: 90 [2021-10-15 20:01:49,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:01:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-15 20:01:49,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-10-15 20:01:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-15 20:01:49,253 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-10-15 20:01:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:49,254 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-15 20:01:49,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-15 20:01:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-15 20:01:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-15 20:01:49,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:49,259 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:49,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:01:49,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 20:01:49,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcspnErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736785, now seen corresponding path program 1 times [2021-10-15 20:01:49,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:49,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018244075] [2021-10-15 20:01:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:49,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:49,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:49,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:49,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018244075] [2021-10-15 20:01:49,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018244075] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:49,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:49,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:01:49,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825993412] [2021-10-15 20:01:49,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:01:49,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:01:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:01:49,546 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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) [2021-10-15 20:01:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:49,658 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-15 20:01:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:01:49,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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 17 [2021-10-15 20:01:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:49,660 INFO L225 Difference]: With dead ends: 64 [2021-10-15 20:01:49,660 INFO L226 Difference]: Without dead ends: 64 [2021-10-15 20:01:49,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:01:49,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-15 20:01:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-15 20:01:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-15 20:01:49,664 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-15 20:01:49,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:49,666 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-15 20:01:49,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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) [2021-10-15 20:01:49,667 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-15 20:01:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-15 20:01:49,669 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:49,669 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:49,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:01:49,670 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736784, now seen corresponding path program 1 times [2021-10-15 20:01:49,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:49,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233321009] [2021-10-15 20:01:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:49,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:49,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:49,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:49,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:49,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233321009] [2021-10-15 20:01:49,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233321009] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:49,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:49,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 20:01:49,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523970799] [2021-10-15 20:01:49,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:01:49,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:01:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:01:49,801 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 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) [2021-10-15 20:01:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:50,034 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-10-15 20:01:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:01:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 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 17 [2021-10-15 20:01:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:50,037 INFO L225 Difference]: With dead ends: 86 [2021-10-15 20:01:50,038 INFO L226 Difference]: Without dead ends: 86 [2021-10-15 20:01:50,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:01:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-15 20:01:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-10-15 20:01:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 61 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-10-15 20:01:50,041 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-10-15 20:01:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:50,042 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-10-15 20:01:50,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 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) [2021-10-15 20:01:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-10-15 20:01:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-15 20:01:50,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:50,043 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:50,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:01:50,043 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1869159940, now seen corresponding path program 1 times [2021-10-15 20:01:50,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:50,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247710201] [2021-10-15 20:01:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:50,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:50,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:50,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:50,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247710201] [2021-10-15 20:01:50,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247710201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:50,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848473623] [2021-10-15 20:01:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:50,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:01:50,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:01:50,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:01:50,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:01:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:50,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:01:50,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:01:50,342 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-15 20:01:50,342 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-15 20:01:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:50,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848473623] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:50,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:01:50,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-15 20:01:50,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543949907] [2021-10-15 20:01:50,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:01:50,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:01:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:01:50,455 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-10-15 20:01:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:50,637 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-15 20:01:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:01:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 17 [2021-10-15 20:01:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:50,638 INFO L225 Difference]: With dead ends: 74 [2021-10-15 20:01:50,639 INFO L226 Difference]: Without dead ends: 74 [2021-10-15 20:01:50,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:01:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-15 20:01:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-10-15 20:01:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.38) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-15 20:01:50,642 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-15 20:01:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:50,642 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-15 20:01:50,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-10-15 20:01:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-15 20:01:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-15 20:01:50,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:50,643 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:50,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:01:50,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:01:50,866 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcspnErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash 63888821, now seen corresponding path program 1 times [2021-10-15 20:01:50,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:50,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144770676] [2021-10-15 20:01:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:50,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:50,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:50,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144770676] [2021-10-15 20:01:50,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144770676] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:50,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:50,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:01:50,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332411165] [2021-10-15 20:01:50,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:01:50,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:01:50,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:01:50,938 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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) [2021-10-15 20:01:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:51,083 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-15 20:01:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:01:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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 21 [2021-10-15 20:01:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:51,084 INFO L225 Difference]: With dead ends: 64 [2021-10-15 20:01:51,084 INFO L226 Difference]: Without dead ends: 64 [2021-10-15 20:01:51,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:01:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-15 20:01:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-10-15 20:01:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-10-15 20:01:51,088 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-10-15 20:01:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:51,088 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-10-15 20:01:51,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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) [2021-10-15 20:01:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-10-15 20:01:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-15 20:01:51,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:51,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:51,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:01:51,089 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash 63888822, now seen corresponding path program 1 times [2021-10-15 20:01:51,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:51,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722755586] [2021-10-15 20:01:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:51,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:51,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:51,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722755586] [2021-10-15 20:01:51,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722755586] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:51,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:51,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:01:51,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779873918] [2021-10-15 20:01:51,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:01:51,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:01:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:01:51,189 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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) [2021-10-15 20:01:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:51,431 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-10-15 20:01:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:01:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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 21 [2021-10-15 20:01:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:51,432 INFO L225 Difference]: With dead ends: 76 [2021-10-15 20:01:51,433 INFO L226 Difference]: Without dead ends: 76 [2021-10-15 20:01:51,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:01:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-15 20:01:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-10-15 20:01:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-10-15 20:01:51,436 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-10-15 20:01:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:51,438 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-10-15 20:01:51,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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) [2021-10-15 20:01:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-10-15 20:01:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-15 20:01:51,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:51,440 INFO L512 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] [2021-10-15 20:01:51,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 20:01:51,440 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1250379430, now seen corresponding path program 1 times [2021-10-15 20:01:51,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:51,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138295279] [2021-10-15 20:01:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:51,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-15 20:01:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:51,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:51,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138295279] [2021-10-15 20:01:51,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138295279] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:51,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:51,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:01:51,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970778604] [2021-10-15 20:01:51,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:01:51,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:51,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:01:51,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:51,552 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:51,618 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-10-15 20:01:51,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:01:51,618 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-10-15 20:01:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:51,619 INFO L225 Difference]: With dead ends: 67 [2021-10-15 20:01:51,619 INFO L226 Difference]: Without dead ends: 62 [2021-10-15 20:01:51,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-15 20:01:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-15 20:01:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 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) [2021-10-15 20:01:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-15 20:01:51,623 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-10-15 20:01:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:51,624 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-15 20:01:51,624 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), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:01:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-15 20:01:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 20:01:51,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:51,625 INFO L512 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] [2021-10-15 20:01:51,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:01:51,625 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:51,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1590997555, now seen corresponding path program 1 times [2021-10-15 20:01:51,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:51,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763262354] [2021-10-15 20:01:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:51,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:51,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:51,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763262354] [2021-10-15 20:01:51,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763262354] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:51,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:51,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:01:51,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359135331] [2021-10-15 20:01:51,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:01:51,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:01:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:01:51,664 INFO L87 Difference]: Start difference. First operand 62 states and 72 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, (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) [2021-10-15 20:01:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:51,725 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-15 20:01:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:01:51,726 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, (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 25 [2021-10-15 20:01:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:51,728 INFO L225 Difference]: With dead ends: 64 [2021-10-15 20:01:51,728 INFO L226 Difference]: Without dead ends: 64 [2021-10-15 20:01:51,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:01:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-15 20:01:51,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-15 20:01:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 3 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) [2021-10-15 20:01:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-15 20:01:51,733 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-10-15 20:01:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:51,734 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-15 20:01:51,734 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, (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) [2021-10-15 20:01:51,734 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-15 20:01:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 20:01:51,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:51,736 INFO L512 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] [2021-10-15 20:01:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:01:51,736 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 53849226, now seen corresponding path program 1 times [2021-10-15 20:01:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:51,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502194808] [2021-10-15 20:01:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:51,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:51,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:51,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502194808] [2021-10-15 20:01:51,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502194808] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:51,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:51,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 20:01:51,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192446808] [2021-10-15 20:01:51,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:01:51,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:01:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:01:51,915 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 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) [2021-10-15 20:01:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:52,135 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-10-15 20:01:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:01:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 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 27 [2021-10-15 20:01:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:52,137 INFO L225 Difference]: With dead ends: 77 [2021-10-15 20:01:52,137 INFO L226 Difference]: Without dead ends: 59 [2021-10-15 20:01:52,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:01:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-15 20:01:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-15 20:01:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 3 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) [2021-10-15 20:01:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-15 20:01:52,140 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-10-15 20:01:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:52,140 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-15 20:01:52,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 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) [2021-10-15 20:01:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-15 20:01:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 20:01:52,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:52,141 INFO L512 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] [2021-10-15 20:01:52,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 20:01:52,141 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:52,142 INFO L82 PathProgramCache]: Analyzing trace with hash 476551052, now seen corresponding path program 1 times [2021-10-15 20:01:52,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:52,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467152994] [2021-10-15 20:01:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:52,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:52,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:52,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:52,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467152994] [2021-10-15 20:01:52,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467152994] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:52,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:52,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 20:01:52,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190503960] [2021-10-15 20:01:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:01:52,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:01:52,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:01:52,364 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 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) [2021-10-15 20:01:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:52,596 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-10-15 20:01:52,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:01:52,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 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 27 [2021-10-15 20:01:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:52,598 INFO L225 Difference]: With dead ends: 80 [2021-10-15 20:01:52,598 INFO L226 Difference]: Without dead ends: 67 [2021-10-15 20:01:52,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:01:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-15 20:01:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-15 20:01:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 3 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) [2021-10-15 20:01:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-10-15 20:01:52,602 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-10-15 20:01:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:52,603 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-10-15 20:01:52,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 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) [2021-10-15 20:01:52,604 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-10-15 20:01:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 20:01:52,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:52,604 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:52,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 20:01:52,605 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -183584433, now seen corresponding path program 1 times [2021-10-15 20:01:52,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:52,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383067958] [2021-10-15 20:01:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:52,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:52,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:52,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:52,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383067958] [2021-10-15 20:01:52,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383067958] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:52,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:52,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-15 20:01:52,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855370352] [2021-10-15 20:01:52,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:01:52,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:52,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:01:52,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:01:52,801 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 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) [2021-10-15 20:01:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:53,097 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-10-15 20:01:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:01:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 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 31 [2021-10-15 20:01:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:53,098 INFO L225 Difference]: With dead ends: 81 [2021-10-15 20:01:53,098 INFO L226 Difference]: Without dead ends: 81 [2021-10-15 20:01:53,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:01:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-15 20:01:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-15 20:01:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 73 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-10-15 20:01:53,102 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-10-15 20:01:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:53,102 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-10-15 20:01:53,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 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) [2021-10-15 20:01:53,103 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-10-15 20:01:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 20:01:53,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:53,103 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:53,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 20:01:53,103 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:53,104 INFO L82 PathProgramCache]: Analyzing trace with hash -317597939, now seen corresponding path program 1 times [2021-10-15 20:01:53,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:53,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621788770] [2021-10-15 20:01:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:53,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:53,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:53,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:53,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:53,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621788770] [2021-10-15 20:01:53,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621788770] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:01:53,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:01:53,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-15 20:01:53,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202452364] [2021-10-15 20:01:53,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:01:53,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:01:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:01:53,287 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 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) [2021-10-15 20:01:53,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:53,610 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-10-15 20:01:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:01:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 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 31 [2021-10-15 20:01:53,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:53,611 INFO L225 Difference]: With dead ends: 103 [2021-10-15 20:01:53,611 INFO L226 Difference]: Without dead ends: 103 [2021-10-15 20:01:53,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-15 20:01:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-15 20:01:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-10-15 20:01:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-10-15 20:01:53,614 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-10-15 20:01:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:53,614 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-10-15 20:01:53,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 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) [2021-10-15 20:01:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-10-15 20:01:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-15 20:01:53,615 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:53,615 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:53,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-15 20:01:53,616 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:53,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:53,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1215695489, now seen corresponding path program 1 times [2021-10-15 20:01:53,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:53,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852236793] [2021-10-15 20:01:53,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:53,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:53,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:53,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:53,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852236793] [2021-10-15 20:01:53,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852236793] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:53,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233412544] [2021-10-15 20:01:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:53,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:01:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:01:53,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:01:53,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:01:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:53,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-15 20:01:53,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:01:53,928 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:01:53,928 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-15 20:01:53,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 13 [2021-10-15 20:01:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:01:54,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233412544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:54,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:01:54,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-15 20:01:54,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221742862] [2021-10-15 20:01:54,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:01:54,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:01:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:01:54,207 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:54,564 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2021-10-15 20:01:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:01:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-10-15 20:01:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:54,566 INFO L225 Difference]: With dead ends: 152 [2021-10-15 20:01:54,566 INFO L226 Difference]: Without dead ends: 152 [2021-10-15 20:01:54,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-10-15 20:01:54,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-15 20:01:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-10-15 20:01:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 107 states have internal predecessors, (126), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2021-10-15 20:01:54,571 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 32 [2021-10-15 20:01:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:54,572 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2021-10-15 20:01:54,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2021-10-15 20:01:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 20:01:54,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:54,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:54,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:01:54,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:01:54,774 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:54,775 INFO L82 PathProgramCache]: Analyzing trace with hash 929596304, now seen corresponding path program 1 times [2021-10-15 20:01:54,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:54,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881487927] [2021-10-15 20:01:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:54,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:54,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:54,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881487927] [2021-10-15 20:01:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881487927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:54,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673238822] [2021-10-15 20:01:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:54,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:01:54,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:01:54,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:01:54,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:01:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:55,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:01:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:01:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673238822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:55,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:01:55,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-10-15 20:01:55,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972378569] [2021-10-15 20:01:55,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 20:01:55,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 20:01:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:01:55,351 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:01:55,785 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2021-10-15 20:01:55,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:01:55,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-15 20:01:55,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:01:55,787 INFO L225 Difference]: With dead ends: 152 [2021-10-15 20:01:55,787 INFO L226 Difference]: Without dead ends: 152 [2021-10-15 20:01:55,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-10-15 20:01:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-15 20:01:55,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2021-10-15 20:01:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 119 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2021-10-15 20:01:55,792 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 35 [2021-10-15 20:01:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:01:55,793 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2021-10-15 20:01:55,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:01:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2021-10-15 20:01:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-15 20:01:55,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:01:55,794 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:01:55,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:01:55,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-15 20:01:55,995 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:01:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:01:55,995 INFO L82 PathProgramCache]: Analyzing trace with hash -800192796, now seen corresponding path program 2 times [2021-10-15 20:01:55,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:01:55,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595549782] [2021-10-15 20:01:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:01:55,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:01:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:56,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:01:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:01:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:56,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:01:56,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595549782] [2021-10-15 20:01:56,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595549782] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:56,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957951926] [2021-10-15 20:01:56,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:01:56,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:01:56,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:01:56,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:01:56,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:01:56,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:01:56,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:01:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 20:01:56,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:01:56,554 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 [2021-10-15 20:01:57,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:01:57,347 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 33 treesize of output 33 [2021-10-15 20:01:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:01:57,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957951926] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:01:57,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:01:57,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-10-15 20:01:57,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025653931] [2021-10-15 20:01:57,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-15 20:01:57,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:01:57,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-15 20:01:57,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-10-15 20:01:57,622 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:00,074 INFO L93 Difference]: Finished difference Result 248 states and 277 transitions. [2021-10-15 20:02:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-15 20:02:00,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-10-15 20:02:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:00,077 INFO L225 Difference]: With dead ends: 248 [2021-10-15 20:02:00,077 INFO L226 Difference]: Without dead ends: 248 [2021-10-15 20:02:00,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1615.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-10-15 20:02:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-10-15 20:02:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 182. [2021-10-15 20:02:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 171 states have (on average 1.2222222222222223) internal successors, (209), 175 states have internal predecessors, (209), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 215 transitions. [2021-10-15 20:02:00,087 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 215 transitions. Word has length 41 [2021-10-15 20:02:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:00,087 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 215 transitions. [2021-10-15 20:02:00,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 215 transitions. [2021-10-15 20:02:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-15 20:02:00,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:00,089 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:00,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:00,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 20:02:00,308 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:00,309 INFO L82 PathProgramCache]: Analyzing trace with hash 23212469, now seen corresponding path program 2 times [2021-10-15 20:02:00,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:00,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484050616] [2021-10-15 20:02:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:00,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:00,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:00,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:00,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484050616] [2021-10-15 20:02:00,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484050616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:00,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270578369] [2021-10-15 20:02:00,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:02:00,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:00,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:00,754 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:00,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:02:00,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:02:00,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:02:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-15 20:02:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:01,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-10-15 20:02:01,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-10-15 20:02:01,273 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-10-15 20:02:01,273 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 26 treesize of output 25 [2021-10-15 20:02:01,814 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-15 20:02:01,815 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 35 treesize of output 23 [2021-10-15 20:02:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:01,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270578369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:01,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:01,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-10-15 20:02:01,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811494944] [2021-10-15 20:02:01,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-15 20:02:01,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-15 20:02:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-10-15 20:02:01,838 INFO L87 Difference]: Start difference. First operand 182 states and 215 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:02,770 INFO L93 Difference]: Finished difference Result 297 states and 342 transitions. [2021-10-15 20:02:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-10-15 20:02:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:02,783 INFO L225 Difference]: With dead ends: 297 [2021-10-15 20:02:02,783 INFO L226 Difference]: Without dead ends: 246 [2021-10-15 20:02:02,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 878.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-10-15 20:02:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-10-15 20:02:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2021-10-15 20:02:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.1981981981981982) internal successors, (266), 226 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 273 transitions. [2021-10-15 20:02:02,792 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 273 transitions. Word has length 43 [2021-10-15 20:02:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:02,793 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 273 transitions. [2021-10-15 20:02:02,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 273 transitions. [2021-10-15 20:02:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-15 20:02:02,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:02,794 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:02,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:03,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-15 20:02:03,010 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:03,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:03,010 INFO L82 PathProgramCache]: Analyzing trace with hash 51080568, now seen corresponding path program 3 times [2021-10-15 20:02:03,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:03,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923087200] [2021-10-15 20:02:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:03,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:03,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:03,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:03,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923087200] [2021-10-15 20:02:03,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923087200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:03,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675570745] [2021-10-15 20:02:03,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:02:03,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:03,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:03,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:02:03,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:02:03,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:02:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-15 20:02:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:03,546 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-15 20:02:03,547 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-15 20:02:03,910 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 [2021-10-15 20:02:04,832 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-10-15 20:02:04,833 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 40 treesize of output 35 [2021-10-15 20:02:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:05,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675570745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:05,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:05,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-10-15 20:02:05,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273994682] [2021-10-15 20:02:05,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-15 20:02:05,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-15 20:02:05,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-10-15 20:02:05,075 INFO L87 Difference]: Start difference. First operand 234 states and 273 transitions. Second operand has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:07,454 INFO L93 Difference]: Finished difference Result 412 states and 465 transitions. [2021-10-15 20:02:07,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-15 20:02:07,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-15 20:02:07,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:07,459 INFO L225 Difference]: With dead ends: 412 [2021-10-15 20:02:07,459 INFO L226 Difference]: Without dead ends: 412 [2021-10-15 20:02:07,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1815.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-10-15 20:02:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-15 20:02:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-10-15 20:02:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 284 states have (on average 1.2007042253521127) internal successors, (341), 288 states have internal predecessors, (341), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-10-15 20:02:07,471 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 47 [2021-10-15 20:02:07,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:07,472 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-10-15 20:02:07,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:07,472 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-10-15 20:02:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-15 20:02:07,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:07,473 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:07,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:07,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-15 20:02:07,690 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:07,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash -608435781, now seen corresponding path program 3 times [2021-10-15 20:02:07,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:07,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270114461] [2021-10-15 20:02:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:07,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:08,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:08,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:08,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270114461] [2021-10-15 20:02:08,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270114461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:08,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243844886] [2021-10-15 20:02:08,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:02:08,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:08,066 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:08,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:02:08,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 20:02:08,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:02:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 20:02:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:08,502 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-15 20:02:08,502 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-15 20:02:08,653 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 [2021-10-15 20:02:09,401 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-10-15 20:02:09,402 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 27 treesize of output 24 [2021-10-15 20:02:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 20:02:09,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243844886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:09,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:09,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-10-15 20:02:09,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530642194] [2021-10-15 20:02:09,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-15 20:02:09,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-15 20:02:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-10-15 20:02:09,492 INFO L87 Difference]: Start difference. First operand 296 states and 348 transitions. Second operand has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:14,280 INFO L93 Difference]: Finished difference Result 548 states and 604 transitions. [2021-10-15 20:02:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-15 20:02:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-15 20:02:14,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:14,283 INFO L225 Difference]: With dead ends: 548 [2021-10-15 20:02:14,283 INFO L226 Difference]: Without dead ends: 476 [2021-10-15 20:02:14,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 3762.2ms TimeCoverageRelationStatistics Valid=1037, Invalid=7335, Unknown=0, NotChecked=0, Total=8372 [2021-10-15 20:02:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-10-15 20:02:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 269. [2021-10-15 20:02:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 260 states have (on average 1.15) internal successors, (299), 261 states have internal predecessors, (299), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2021-10-15 20:02:14,297 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 51 [2021-10-15 20:02:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:14,298 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2021-10-15 20:02:14,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2021-10-15 20:02:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-15 20:02:14,299 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:14,299 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:14,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:14,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 20:02:14,521 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash 988427292, now seen corresponding path program 4 times [2021-10-15 20:02:14,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:14,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876935568] [2021-10-15 20:02:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:14,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:14,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:14,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:14,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876935568] [2021-10-15 20:02:14,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876935568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:14,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850403759] [2021-10-15 20:02:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:02:14,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:14,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:14,772 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:02:15,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:02:15,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:02:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 20:02:15,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:15,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-10-15 20:02:15,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-10-15 20:02:15,434 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-15 20:02:15,434 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 35 treesize of output 34 [2021-10-15 20:02:17,411 INFO L354 Elim1Store]: treesize reduction 120, result has 12.4 percent of original size [2021-10-15 20:02:17,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 55 [2021-10-15 20:02:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:17,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850403759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:17,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:17,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 29 [2021-10-15 20:02:17,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737669341] [2021-10-15 20:02:17,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-15 20:02:17,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:17,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-15 20:02:17,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-10-15 20:02:17,445 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:28,030 INFO L93 Difference]: Finished difference Result 453 states and 508 transitions. [2021-10-15 20:02:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:02:28,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-10-15 20:02:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:28,032 INFO L225 Difference]: With dead ends: 453 [2021-10-15 20:02:28,032 INFO L226 Difference]: Without dead ends: 283 [2021-10-15 20:02:28,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 10515.1ms TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2021-10-15 20:02:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-15 20:02:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 277. [2021-10-15 20:02:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 268 states have (on average 1.1455223880597014) internal successors, (307), 269 states have internal predecessors, (307), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2021-10-15 20:02:28,041 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 58 [2021-10-15 20:02:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:28,041 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2021-10-15 20:02:28,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2021-10-15 20:02:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-15 20:02:28,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:28,043 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:28,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-15 20:02:28,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 20:02:28,256 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 39819769, now seen corresponding path program 5 times [2021-10-15 20:02:28,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:28,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82074904] [2021-10-15 20:02:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:28,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:28,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:28,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:28,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82074904] [2021-10-15 20:02:28,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82074904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:28,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958172138] [2021-10-15 20:02:28,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:02:28,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:28,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:28,474 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:28,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:02:28,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-15 20:02:28,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:02:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 20:02:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:29,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958172138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:29,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:29,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-10-15 20:02:29,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988907136] [2021-10-15 20:02:29,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-15 20:02:29,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-15 20:02:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-10-15 20:02:29,362 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:30,092 INFO L93 Difference]: Finished difference Result 395 states and 448 transitions. [2021-10-15 20:02:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:02:30,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-10-15 20:02:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:30,095 INFO L225 Difference]: With dead ends: 395 [2021-10-15 20:02:30,095 INFO L226 Difference]: Without dead ends: 395 [2021-10-15 20:02:30,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-10-15 20:02:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-10-15 20:02:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 342. [2021-10-15 20:02:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 333 states have (on average 1.1411411411411412) internal successors, (380), 334 states have internal predecessors, (380), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 387 transitions. [2021-10-15 20:02:30,110 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 387 transitions. Word has length 62 [2021-10-15 20:02:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:30,110 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 387 transitions. [2021-10-15 20:02:30,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 387 transitions. [2021-10-15 20:02:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-15 20:02:30,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:30,113 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:30,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:30,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:30,338 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2012816133, now seen corresponding path program 6 times [2021-10-15 20:02:30,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:30,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434745449] [2021-10-15 20:02:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:30,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:30,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:30,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:30,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434745449] [2021-10-15 20:02:30,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434745449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:30,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790778821] [2021-10-15 20:02:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:02:30,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:30,742 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:30,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:02:31,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-15 20:02:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:02:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-15 20:02:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:31,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-10-15 20:02:31,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-10-15 20:02:31,651 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-15 20:02:31,651 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 35 treesize of output 34 [2021-10-15 20:02:32,893 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-15 20:02:32,894 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 38 treesize of output 23 [2021-10-15 20:02:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:32,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790778821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:32,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:32,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-10-15 20:02:32,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000159370] [2021-10-15 20:02:32,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-15 20:02:32,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-15 20:02:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-10-15 20:02:32,918 INFO L87 Difference]: Start difference. First operand 342 states and 387 transitions. Second operand has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:50,614 INFO L93 Difference]: Finished difference Result 591 states and 662 transitions. [2021-10-15 20:02:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 20:02:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-10-15 20:02:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:50,616 INFO L225 Difference]: With dead ends: 591 [2021-10-15 20:02:50,616 INFO L226 Difference]: Without dead ends: 356 [2021-10-15 20:02:50,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 17134.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-10-15 20:02:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-10-15 20:02:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 350. [2021-10-15 20:02:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 341 states have (on average 1.1378299120234605) internal successors, (388), 342 states have internal predecessors, (388), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 395 transitions. [2021-10-15 20:02:50,627 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 395 transitions. Word has length 73 [2021-10-15 20:02:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:50,627 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 395 transitions. [2021-10-15 20:02:50,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 395 transitions. [2021-10-15 20:02:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-15 20:02:50,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:50,629 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:50,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:02:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-15 20:02:50,848 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:50,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1889050242, now seen corresponding path program 7 times [2021-10-15 20:02:50,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:50,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257728422] [2021-10-15 20:02:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:50,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:51,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:51,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:51,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257728422] [2021-10-15 20:02:51,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257728422] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:51,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464145347] [2021-10-15 20:02:51,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:02:51,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:51,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:51,093 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:51,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 20:02:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:51,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-15 20:02:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:51,695 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-15 20:02:51,695 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 1 case distinctions, treesize of input 13 treesize of output 18 [2021-10-15 20:02:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:53,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464145347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:53,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:53,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-10-15 20:02:53,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187393910] [2021-10-15 20:02:53,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-15 20:02:53,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-15 20:02:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-10-15 20:02:53,569 INFO L87 Difference]: Start difference. First operand 350 states and 395 transitions. Second operand has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:02:55,552 INFO L93 Difference]: Finished difference Result 541 states and 602 transitions. [2021-10-15 20:02:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-15 20:02:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-10-15 20:02:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:02:55,555 INFO L225 Difference]: With dead ends: 541 [2021-10-15 20:02:55,555 INFO L226 Difference]: Without dead ends: 541 [2021-10-15 20:02:55,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1094.0ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-10-15 20:02:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-10-15 20:02:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 415. [2021-10-15 20:02:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 406 states have (on average 1.1354679802955665) internal successors, (461), 407 states have internal predecessors, (461), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 468 transitions. [2021-10-15 20:02:55,568 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 468 transitions. Word has length 77 [2021-10-15 20:02:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:02:55,568 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 468 transitions. [2021-10-15 20:02:55,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:02:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 468 transitions. [2021-10-15 20:02:55,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-15 20:02:55,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:02:55,570 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:02:55,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-15 20:02:55,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:55,786 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:02:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:02:55,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2004328534, now seen corresponding path program 8 times [2021-10-15 20:02:55,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:02:55,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776168485] [2021-10-15 20:02:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:02:55,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:02:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:02:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:02:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:56,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:02:56,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776168485] [2021-10-15 20:02:56,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776168485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:56,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818498346] [2021-10-15 20:02:56,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:02:56,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:02:56,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:02:56,163 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:02:56,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 20:02:56,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:02:56,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:02:56,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-15 20:02:56,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:02:56,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-10-15 20:02:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-10-15 20:02:57,343 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-15 20:02:57,344 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 35 treesize of output 34 [2021-10-15 20:02:58,911 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-15 20:02:58,911 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 38 treesize of output 23 [2021-10-15 20:02:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:02:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818498346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:02:58,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:02:58,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-10-15 20:02:58,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306521860] [2021-10-15 20:02:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-15 20:02:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:02:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-15 20:02:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-10-15 20:02:58,937 INFO L87 Difference]: Start difference. First operand 415 states and 468 transitions. Second operand has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:03:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:03:23,208 INFO L93 Difference]: Finished difference Result 729 states and 816 transitions. [2021-10-15 20:03:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:03:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-10-15 20:03:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:03:23,211 INFO L225 Difference]: With dead ends: 729 [2021-10-15 20:03:23,212 INFO L226 Difference]: Without dead ends: 429 [2021-10-15 20:03:23,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 23345.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2021-10-15 20:03:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-15 20:03:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 423. [2021-10-15 20:03:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 414 states have (on average 1.1328502415458936) internal successors, (469), 415 states have internal predecessors, (469), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:03:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 476 transitions. [2021-10-15 20:03:23,224 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 476 transitions. Word has length 88 [2021-10-15 20:03:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:03:23,224 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 476 transitions. [2021-10-15 20:03:23,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:03:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 476 transitions. [2021-10-15 20:03:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-15 20:03:23,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:03:23,227 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:03:23,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 20:03:23,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-15 20:03:23,454 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-10-15 20:03:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:03:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1747133811, now seen corresponding path program 9 times [2021-10-15 20:03:23,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:03:23,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088154984] [2021-10-15 20:03:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:03:23,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:03:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:03:23,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:03:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:03:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:03:23,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:03:23,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088154984] [2021-10-15 20:03:23,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088154984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:03:23,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124986810] [2021-10-15 20:03:23,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:03:23,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:03:23,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:03:23,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:03:23,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 20:03:24,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-15 20:03:24,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:03:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-15 20:03:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:03:24,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-10-15 20:03:24,891 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 9 treesize of output 11 [2021-10-15 20:03:25,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-10-15 20:03:25,265 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-15 20:03:25,265 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 33 treesize of output 32 [2021-10-15 20:03:29,224 INFO L354 Elim1Store]: treesize reduction 79, result has 20.2 percent of original size [2021-10-15 20:03:29,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 43 [2021-10-15 20:03:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-10-15 20:03:29,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124986810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:03:29,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:03:29,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-10-15 20:03:29,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034797358] [2021-10-15 20:03:29,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-15 20:03:29,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:03:29,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-15 20:03:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-10-15 20:03:29,304 INFO L87 Difference]: Start difference. First operand 423 states and 476 transitions. Second operand has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:04:40,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:04:40,378 INFO L93 Difference]: Finished difference Result 528 states and 583 transitions. [2021-10-15 20:04:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-15 20:04:40,378 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-10-15 20:04:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:04:40,379 INFO L225 Difference]: With dead ends: 528 [2021-10-15 20:04:40,379 INFO L226 Difference]: Without dead ends: 0 [2021-10-15 20:04:40,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 64655.3ms TimeCoverageRelationStatistics Valid=827, Invalid=7005, Unknown=0, NotChecked=0, Total=7832 [2021-10-15 20:04:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-15 20:04:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-15 20:04:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:04:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-15 20:04:40,382 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2021-10-15 20:04:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:04:40,382 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-15 20:04:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:04:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-15 20:04:40,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-15 20:04:40,385 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-15 20:04:40,385 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-15 20:04:40,386 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-15 20:04:40,386 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-15 20:04:40,386 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-15 20:04:40,386 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-15 20:04:40,386 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-15 20:04:40,386 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-15 20:04:40,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 20:04:40,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr0REQUIRES_VIOLATION [2021-10-15 20:04:40,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr1REQUIRES_VIOLATION [2021-10-15 20:04:40,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr2REQUIRES_VIOLATION [2021-10-15 20:04:40,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr3REQUIRES_VIOLATION [2021-10-15 20:04:40,387 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr4REQUIRES_VIOLATION [2021-10-15 20:04:40,388 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr5REQUIRES_VIOLATION [2021-10-15 20:04:40,388 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr6REQUIRES_VIOLATION [2021-10-15 20:04:40,388 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr7REQUIRES_VIOLATION [2021-10-15 20:04:40,388 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr8REQUIRES_VIOLATION [2021-10-15 20:04:40,388 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr9REQUIRES_VIOLATION [2021-10-15 20:04:40,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 20:04:40,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-15 20:04:40,617 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:04:40,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:04:40 BoogieIcfgContainer [2021-10-15 20:04:40,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:04:40,620 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:04:40,620 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:04:40,621 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:04:40,621 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:01:45" (3/4) ... [2021-10-15 20:04:40,624 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:04:40,629 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-15 20:04:40,629 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcspn [2021-10-15 20:04:40,629 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-15 20:04:40,629 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-15 20:04:40,629 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-15 20:04:40,630 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-15 20:04:40,630 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-15 20:04:40,630 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-15 20:04:40,635 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-15 20:04:40,635 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-15 20:04:40,635 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:04:40,635 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:04:40,694 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:04:40,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:04:40,696 INFO L168 Benchmark]: Toolchain (without parser) took 176500.63 ms. Allocated memory was 96.5 MB in the beginning and 222.3 MB in the end (delta: 125.8 MB). Free memory was 66.3 MB in the beginning and 70.4 MB in the end (delta: -4.1 MB). Peak memory consumption was 121.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:04:40,696 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:04:40,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 469.09 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 87.7 MB in the end (delta: -21.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:04:40,697 INFO L168 Benchmark]: Boogie Preprocessor took 61.77 ms. Allocated memory is still 117.4 MB. Free memory was 87.7 MB in the beginning and 85.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:04:40,698 INFO L168 Benchmark]: RCFGBuilder took 724.66 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 64.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:04:40,701 INFO L168 Benchmark]: TraceAbstraction took 175150.84 ms. Allocated memory was 117.4 MB in the beginning and 222.3 MB in the end (delta: 104.9 MB). Free memory was 63.6 MB in the beginning and 74.2 MB in the end (delta: -10.7 MB). Peak memory consumption was 96.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:04:40,702 INFO L168 Benchmark]: Witness Printer took 74.50 ms. Allocated memory is still 222.3 MB. Free memory was 74.2 MB in the beginning and 70.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:04:40,704 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 469.09 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 87.7 MB in the end (delta: -21.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.77 ms. Allocated memory is still 117.4 MB. Free memory was 87.7 MB in the beginning and 85.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 724.66 ms. Allocated memory is still 117.4 MB. Free memory was 85.1 MB in the beginning and 64.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 175150.84 ms. Allocated memory was 117.4 MB in the beginning and 222.3 MB in the end (delta: 104.9 MB). Free memory was 63.6 MB in the beginning and 74.2 MB in the end (delta: -10.7 MB). Peak memory consumption was 96.5 MB. Max. memory is 16.1 GB. * Witness Printer took 74.50 ms. Allocated memory is still 222.3 MB. Free memory was 74.2 MB in the beginning and 70.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 77 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 175053.9ms, OverallIterations: 32, TraceHistogramMax: 5, EmptinessCheckTime: 54.9ms, AutomataDifference: 141364.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1306 SDtfs, 5153 SDslu, 3192 SDs, 0 SdLazy, 19982 SolverSat, 654 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 19993.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1352 GetRequests, 654 SyntacticMatches, 11 SemanticMatches, 687 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 126979.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=423occurred in iteration=31, InterpolantAutomatonStates: 453, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 301.2ms AutomataMinimizationTime, 32 MinimizatonAttempts, 814 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 174.3ms SsaConstructionTime, 1019.9ms SatisfiabilityAnalysisTime, 23544.0ms InterpolantComputationTime, 1801 NumberOfCodeBlocks, 1798 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 1755 ConstructedInterpolants, 286 QuantifiedInterpolants, 20907 SizeOfPredicates, 165 NumberOfNonLiveVariables, 3013 ConjunctsInSsa, 475 ConjunctsInUnsatCore, 46 InterpolantComputations, 18 PerfectInterpolantSequences, 443/1325 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:04:40,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc3d98fe-caea-472e-adef-e5fc83297c17/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...