./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg --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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:06:32,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:06:32,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:06:32,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:06:32,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:06:32,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:06:32,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:06:32,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:06:32,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:06:32,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:06:32,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:06:32,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:06:32,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:06:32,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:06:32,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:06:32,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:06:32,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:06:32,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:06:32,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:06:32,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:06:32,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:06:32,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:06:32,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:06:32,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:06:32,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:06:32,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:06:32,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:06:32,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:06:32,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:06:32,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:06:32,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:06:32,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:06:32,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:06:32,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:06:32,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:06:32,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:06:32,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:06:32,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:06:32,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:06:32,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:06:32,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:06:32,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:06:32,869 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:06:32,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:06:32,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:06:32,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:06:32,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:06:32,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:06:32,878 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:06:32,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:06:32,879 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:06:32,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:06:32,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:06:32,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:06:32,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:06:32,881 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:06:32,881 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:06:32,881 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:06:32,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:06:32,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:06:32,882 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:06:32,882 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:06:32,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:06:32,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:06:32,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:06:32,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:06:32,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:06:32,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:06:32,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:06:32,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:06:32,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:06:32,885 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_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2021-10-28 09:06:33,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:06:33,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:06:33,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:06:33,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:06:33,159 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:06:33,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-10-28 09:06:33,251 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/data/054182615/c576786849e94265840920b04dafafda/FLAG081eff58b [2021-10-28 09:06:33,748 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:06:33,748 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-10-28 09:06:33,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/data/054182615/c576786849e94265840920b04dafafda/FLAG081eff58b [2021-10-28 09:06:34,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/data/054182615/c576786849e94265840920b04dafafda [2021-10-28 09:06:34,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:06:34,243 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:06:34,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:06:34,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:06:34,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:06:34,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5567f95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34, skipping insertion in model container [2021-10-28 09:06:34,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:06:34,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:06:34,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:06:34,603 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:06:34,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:06:34,678 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:06:34,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34 WrapperNode [2021-10-28 09:06:34,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:06:34,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:06:34,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:06:34,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:06:34,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:06:34,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:06:34,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:06:34,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:06:34,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (1/1) ... [2021-10-28 09:06:34,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:06:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:34,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:06:34,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:06:34,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:06:34,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:06:34,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:06:34,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:06:34,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:06:34,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:06:34,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:06:34,891 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-10-28 09:06:34,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:06:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:06:34,891 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:06:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:06:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:06:34,892 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:06:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:06:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:06:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:06:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:06:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:06:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:06:34,893 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:06:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:06:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:06:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:06:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:06:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:06:34,894 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:06:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:06:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:06:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:06:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:06:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:06:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:06:34,895 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:06:34,896 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:06:34,897 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:06:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:06:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:06:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:06:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:06:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:06:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:06:34,898 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:06:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:06:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:06:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:06:34,899 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:06:34,900 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:06:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:06:34,901 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:06:34,902 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:06:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:06:34,903 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:06:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:06:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:06:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:06:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:06:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:06:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:06:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:06:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:06:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:06:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:06:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:06:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:06:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:06:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:06:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:06:34,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:06:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:06:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:06:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:06:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:06:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:06:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:06:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:06:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:06:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:06:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:06:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:06:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:06:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:06:34,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:06:35,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:06:35,385 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:06:35,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:35 BoogieIcfgContainer [2021-10-28 09:06:35,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:06:35,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:06:35,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:06:35,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:06:35,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:06:34" (1/3) ... [2021-10-28 09:06:35,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cacefdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:35, skipping insertion in model container [2021-10-28 09:06:35,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:34" (2/3) ... [2021-10-28 09:06:35,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cacefdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:35, skipping insertion in model container [2021-10-28 09:06:35,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:35" (3/3) ... [2021-10-28 09:06:35,395 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2021-10-28 09:06:35,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:06:35,401 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-10-28 09:06:35,443 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:06:35,448 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:06:35,448 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-10-28 09:06:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 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) [2021-10-28 09:06:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:06:35,470 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:35,470 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:35,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:35,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1422603009, now seen corresponding path program 1 times [2021-10-28 09:06:35,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:35,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465079452] [2021-10-28 09:06:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:35,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:35,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:35,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465079452] [2021-10-28 09:06:35,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465079452] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:35,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:35,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:06:35,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941721348] [2021-10-28 09:06:35,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:06:35,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:06:35,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:06:35,710 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 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 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) [2021-10-28 09:06:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:35,828 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-28 09:06:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:06:35,829 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 [2021-10-28 09:06:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:35,837 INFO L225 Difference]: With dead ends: 50 [2021-10-28 09:06:35,838 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 09:06:35,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:06:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 09:06:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-28 09:06:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 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) [2021-10-28 09:06:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-10-28 09:06:35,900 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 11 [2021-10-28 09:06:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:35,901 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-10-28 09:06:35,901 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) [2021-10-28 09:06:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-10-28 09:06:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:06:35,902 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:35,902 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:35,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:06:35,903 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1422603008, now seen corresponding path program 1 times [2021-10-28 09:06:35,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:35,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450731734] [2021-10-28 09:06:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:35,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:36,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:36,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:36,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450731734] [2021-10-28 09:06:36,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450731734] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:36,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:36,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:06:36,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436357146] [2021-10-28 09:06:36,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:06:36,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:36,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:06:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:06:36,019 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-10-28 09:06:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:36,138 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-10-28 09:06:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:06:36,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2021-10-28 09:06:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:36,140 INFO L225 Difference]: With dead ends: 51 [2021-10-28 09:06:36,140 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:06:36,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:06:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:06:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-10-28 09:06:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 43 states have internal predecessors, (50), 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) [2021-10-28 09:06:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-10-28 09:06:36,147 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 11 [2021-10-28 09:06:36,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:36,148 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-10-28 09:06:36,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2021-10-28 09:06:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-10-28 09:06:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:06:36,149 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:36,149 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:36,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:06:36,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:36,150 INFO L85 PathProgramCache]: Analyzing trace with hash 973924227, now seen corresponding path program 1 times [2021-10-28 09:06:36,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:36,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86481165] [2021-10-28 09:06:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:36,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:36,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:36,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:36,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86481165] [2021-10-28 09:06:36,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86481165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:36,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652368729] [2021-10-28 09:06:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:36,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:36,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:36,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:36,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:06:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:06:36,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:36,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652368729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:36,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:06:36,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-28 09:06:36,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906855472] [2021-10-28 09:06:36,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:06:36,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:06:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:36,568 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:36,626 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-10-28 09:06:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:06:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 15 [2021-10-28 09:06:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:36,629 INFO L225 Difference]: With dead ends: 72 [2021-10-28 09:06:36,629 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:06:36,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:06:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-10-28 09:06:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.45) internal successors, (58), 50 states have internal predecessors, (58), 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) [2021-10-28 09:06:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-28 09:06:36,646 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 15 [2021-10-28 09:06:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:36,646 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-28 09:06:36,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:36,647 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-28 09:06:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:06:36,647 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:36,647 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:36,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:36,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:36,876 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1653982597, now seen corresponding path program 1 times [2021-10-28 09:06:36,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:36,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052709897] [2021-10-28 09:06:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:36,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:37,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:37,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:37,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052709897] [2021-10-28 09:06:37,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052709897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:37,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077848393] [2021-10-28 09:06:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:37,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:37,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:37,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:37,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:06:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:37,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:06:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:37,318 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:06:37,319 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 [2021-10-28 09:06:37,328 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 15 treesize of output 13 [2021-10-28 09:06:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:37,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077848393] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:37,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:37,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 09:06:37,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227853754] [2021-10-28 09:06:37,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:06:37,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:06:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:06:37,433 INFO L87 Difference]: Start difference. First operand 56 states and 63 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) [2021-10-28 09:06:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:37,582 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-10-28 09:06:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:06:37,583 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 [2021-10-28 09:06:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:37,585 INFO L225 Difference]: With dead ends: 57 [2021-10-28 09:06:37,586 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 09:06:37,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 09:06:37,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-10-28 09:06:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.435897435897436) internal successors, (56), 48 states have internal predecessors, (56), 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) [2021-10-28 09:06:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-10-28 09:06:37,605 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2021-10-28 09:06:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:37,605 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-10-28 09:06:37,605 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) [2021-10-28 09:06:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-10-28 09:06:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:06:37,606 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:37,606 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:37,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:37,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:37,807 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -361738470, now seen corresponding path program 1 times [2021-10-28 09:06:37,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:37,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798765068] [2021-10-28 09:06:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:37,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:37,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:37,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:37,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798765068] [2021-10-28 09:06:37,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798765068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:37,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:37,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:06:37,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373102946] [2021-10-28 09:06:37,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:06:37,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:37,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:06:37,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:06:37,861 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-28 09:06:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:37,946 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-28 09:06:37,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:06:37,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-10-28 09:06:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:37,951 INFO L225 Difference]: With dead ends: 60 [2021-10-28 09:06:37,951 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:06:37,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:06:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:06:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-10-28 09:06:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 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) [2021-10-28 09:06:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-28 09:06:37,974 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2021-10-28 09:06:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:37,975 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-28 09:06:37,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-10-28 09:06:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-28 09:06:37,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:06:37,981 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:37,982 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:37,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:06:37,982 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -361738418, now seen corresponding path program 1 times [2021-10-28 09:06:37,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:37,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987341553] [2021-10-28 09:06:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:37,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:38,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:38,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:38,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987341553] [2021-10-28 09:06:38,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987341553] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:38,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:38,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:06:38,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946288029] [2021-10-28 09:06:38,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:06:38,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:06:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:06:38,029 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-10-28 09:06:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:38,098 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-10-28 09:06:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:06:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 17 [2021-10-28 09:06:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:38,100 INFO L225 Difference]: With dead ends: 53 [2021-10-28 09:06:38,100 INFO L226 Difference]: Without dead ends: 53 [2021-10-28 09:06:38,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:06:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-28 09:06:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-28 09:06:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.375) internal successors, (55), 47 states have internal predecessors, (55), 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) [2021-10-28 09:06:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-28 09:06:38,108 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-10-28 09:06:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:38,108 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-28 09:06:38,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-10-28 09:06:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-28 09:06:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:06:38,110 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:38,113 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:38,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:06:38,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash -361738417, now seen corresponding path program 1 times [2021-10-28 09:06:38,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:38,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387713495] [2021-10-28 09:06:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:38,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:38,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:38,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:38,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387713495] [2021-10-28 09:06:38,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387713495] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:38,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:38,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:06:38,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624405206] [2021-10-28 09:06:38,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:06:38,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:38,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:06:38,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:06:38,256 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-28 09:06:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:38,367 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-10-28 09:06:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:06:38,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 17 [2021-10-28 09:06:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:38,369 INFO L225 Difference]: With dead ends: 55 [2021-10-28 09:06:38,369 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 09:06:38,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 09:06:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-10-28 09:06:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 47 states have internal predecessors, (55), 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) [2021-10-28 09:06:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-28 09:06:38,385 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-10-28 09:06:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:38,386 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-28 09:06:38,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-10-28 09:06:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-28 09:06:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:06:38,387 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:38,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:38,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:06:38,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1877401955, now seen corresponding path program 1 times [2021-10-28 09:06:38,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:38,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071413154] [2021-10-28 09:06:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:38,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:38,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:38,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071413154] [2021-10-28 09:06:38,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071413154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:38,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405941103] [2021-10-28 09:06:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:38,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:38,521 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:38,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:06:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:38,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:06:38,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:38,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405941103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:38,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:38,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-10-28 09:06:38,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851105593] [2021-10-28 09:06:38,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:06:38,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:06:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:06:38,910 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-28 09:06:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:39,087 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-10-28 09:06:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:06:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 21 [2021-10-28 09:06:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:39,089 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:06:39,089 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 09:06:39,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:06:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 09:06:39,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-28 09:06:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3265306122448979) 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) [2021-10-28 09:06:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-28 09:06:39,093 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 21 [2021-10-28 09:06:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:39,094 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-28 09:06:39,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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) [2021-10-28 09:06:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-28 09:06:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:06:39,095 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:39,095 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:39,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:39,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:06:39,322 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1877401902, now seen corresponding path program 1 times [2021-10-28 09:06:39,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:39,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856115862] [2021-10-28 09:06:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:39,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:39,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:39,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:39,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856115862] [2021-10-28 09:06:39,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856115862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:39,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319706768] [2021-10-28 09:06:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:39,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:39,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:39,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:06:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:06:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:39,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319706768] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:39,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:06:39,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-28 09:06:39,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704309330] [2021-10-28 09:06:39,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:06:39,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:39,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:06:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:39,648 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:39,673 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-10-28 09:06:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:06:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 09:06:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:39,676 INFO L225 Difference]: With dead ends: 93 [2021-10-28 09:06:39,677 INFO L226 Difference]: Without dead ends: 93 [2021-10-28 09:06:39,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-28 09:06:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-10-28 09:06:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 79 states have internal predecessors, (90), 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) [2021-10-28 09:06:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-10-28 09:06:39,685 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 21 [2021-10-28 09:06:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:39,686 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-10-28 09:06:39,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-10-28 09:06:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:06:39,692 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:39,692 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:39,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:39,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:39,909 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1406448144, now seen corresponding path program 1 times [2021-10-28 09:06:39,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:39,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191023707] [2021-10-28 09:06:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:39,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:39,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:39,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:39,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191023707] [2021-10-28 09:06:39,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191023707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:39,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487537321] [2021-10-28 09:06:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:39,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:39,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:40,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:06:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:40,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:06:40,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:40,182 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:06:40,182 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 [2021-10-28 09:06:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:40,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487537321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:40,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:40,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 09:06:40,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090440000] [2021-10-28 09:06:40,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:06:40,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:06:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:40,312 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-10-28 09:06:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:40,442 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2021-10-28 09:06:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:06:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 21 [2021-10-28 09:06:40,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:40,444 INFO L225 Difference]: With dead ends: 88 [2021-10-28 09:06:40,444 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 09:06:40,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:06:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 09:06:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-10-28 09:06:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 76 states have internal predecessors, (86), 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) [2021-10-28 09:06:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-10-28 09:06:40,448 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-10-28 09:06:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:40,448 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-10-28 09:06:40,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2021-10-28 09:06:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-10-28 09:06:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:06:40,449 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:40,450 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:40,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:40,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 09:06:40,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1137701663, now seen corresponding path program 1 times [2021-10-28 09:06:40,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:40,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549003208] [2021-10-28 09:06:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:40,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:40,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:40,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:40,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549003208] [2021-10-28 09:06:40,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549003208] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:40,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:40,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:06:40,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813739078] [2021-10-28 09:06:40,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:06:40,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:40,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:06:40,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:40,754 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:40,869 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-10-28 09:06:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:06:40,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 09:06:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:40,870 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:06:40,871 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:06:40,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:06:40,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:06:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-10-28 09:06:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 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) [2021-10-28 09:06:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-28 09:06:40,876 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-10-28 09:06:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:40,876 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-28 09:06:40,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-28 09:06:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:06:40,878 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:40,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:40,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:06:40,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -684951934, now seen corresponding path program 1 times [2021-10-28 09:06:40,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:40,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291661149] [2021-10-28 09:06:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:40,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:40,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:40,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:40,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291661149] [2021-10-28 09:06:40,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291661149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:40,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060008879] [2021-10-28 09:06:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:40,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:40,996 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:41,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:06:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:41,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:06:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:41,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060008879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:41,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:41,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-28 09:06:41,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099537696] [2021-10-28 09:06:41,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 09:06:41,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:06:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:06:41,365 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 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) [2021-10-28 09:06:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:41,633 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-28 09:06:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 09:06:41,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 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 26 [2021-10-28 09:06:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:41,635 INFO L225 Difference]: With dead ends: 79 [2021-10-28 09:06:41,635 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 09:06:41,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:06:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 09:06:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-10-28 09:06:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 64 states have internal predecessors, (74), 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) [2021-10-28 09:06:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-10-28 09:06:41,638 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 26 [2021-10-28 09:06:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:41,638 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-10-28 09:06:41,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 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) [2021-10-28 09:06:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-10-28 09:06:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:06:41,644 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:41,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:41,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:41,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:06:41,859 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash -684951935, now seen corresponding path program 1 times [2021-10-28 09:06:41,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:41,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492123315] [2021-10-28 09:06:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:41,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:41,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:41,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:41,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492123315] [2021-10-28 09:06:41,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492123315] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:41,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:41,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:06:41,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506033074] [2021-10-28 09:06:41,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:06:41,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:06:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:06:41,911 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-10-28 09:06:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:42,019 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-28 09:06:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:06:42,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2021-10-28 09:06:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:42,021 INFO L225 Difference]: With dead ends: 69 [2021-10-28 09:06:42,021 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 09:06:42,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:06:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 09:06:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 09:06:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 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) [2021-10-28 09:06:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-10-28 09:06:42,025 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 26 [2021-10-28 09:06:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:42,025 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-10-28 09:06:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-10-28 09:06:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-10-28 09:06:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 09:06:42,026 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:42,026 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:42,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:06:42,026 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:42,027 INFO L85 PathProgramCache]: Analyzing trace with hash -418036057, now seen corresponding path program 1 times [2021-10-28 09:06:42,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:42,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120516733] [2021-10-28 09:06:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:42,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:42,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:42,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120516733] [2021-10-28 09:06:42,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120516733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:42,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:42,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:06:42,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218508021] [2021-10-28 09:06:42,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:06:42,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:06:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:06:42,085 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-10-28 09:06:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:42,254 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-10-28 09:06:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:06:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2021-10-28 09:06:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:42,258 INFO L225 Difference]: With dead ends: 73 [2021-10-28 09:06:42,259 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 09:06:42,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:06:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 09:06:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-10-28 09:06:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 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) [2021-10-28 09:06:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-28 09:06:42,263 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 30 [2021-10-28 09:06:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:42,264 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-28 09:06:42,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-10-28 09:06:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-28 09:06:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 09:06:42,265 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:42,265 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:42,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:06:42,265 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:42,266 INFO L85 PathProgramCache]: Analyzing trace with hash -418036056, now seen corresponding path program 1 times [2021-10-28 09:06:42,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:42,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271188384] [2021-10-28 09:06:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:42,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:06:42,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:42,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271188384] [2021-10-28 09:06:42,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271188384] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:42,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:42,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:06:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451437277] [2021-10-28 09:06:42,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:06:42,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:06:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:06:42,405 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-28 09:06:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:42,617 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-28 09:06:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:06:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 30 [2021-10-28 09:06:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:42,618 INFO L225 Difference]: With dead ends: 72 [2021-10-28 09:06:42,618 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 09:06:42,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:06:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 09:06:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-10-28 09:06:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 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) [2021-10-28 09:06:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-10-28 09:06:42,621 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 30 [2021-10-28 09:06:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:42,622 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-10-28 09:06:42,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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) [2021-10-28 09:06:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-10-28 09:06:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 09:06:42,622 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:42,622 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:42,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 09:06:42,623 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1655830610, now seen corresponding path program 1 times [2021-10-28 09:06:42,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:42,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346040808] [2021-10-28 09:06:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:42,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 09:06:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:06:42,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:42,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346040808] [2021-10-28 09:06:42,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346040808] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:42,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:42,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:06:42,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077135327] [2021-10-28 09:06:42,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:06:42,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:42,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:06:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:06:42,693 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-10-28 09:06:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:42,737 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-28 09:06:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:06:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 33 [2021-10-28 09:06:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:42,739 INFO L225 Difference]: With dead ends: 69 [2021-10-28 09:06:42,739 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:06:42,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:06:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:06:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 09:06:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 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) [2021-10-28 09:06:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-10-28 09:06:42,742 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 33 [2021-10-28 09:06:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:42,743 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-10-28 09:06:42,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-10-28 09:06:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-10-28 09:06:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:06:42,744 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:42,745 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:42,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 09:06:42,745 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash 942908492, now seen corresponding path program 1 times [2021-10-28 09:06:42,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:42,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42758655] [2021-10-28 09:06:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:42,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:06:42,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:42,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42758655] [2021-10-28 09:06:42,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42758655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:42,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:42,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 09:06:42,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241122496] [2021-10-28 09:06:42,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:06:42,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:42,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:06:42,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:06:42,940 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-10-28 09:06:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:43,165 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-10-28 09:06:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:06:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 34 [2021-10-28 09:06:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:43,166 INFO L225 Difference]: With dead ends: 84 [2021-10-28 09:06:43,166 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:06:43,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:06:43,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:06:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 09:06:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 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) [2021-10-28 09:06:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-10-28 09:06:43,169 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2021-10-28 09:06:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:43,170 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-10-28 09:06:43,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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) [2021-10-28 09:06:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-10-28 09:06:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:06:43,170 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:43,170 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:43,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 09:06:43,171 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash 433435402, now seen corresponding path program 1 times [2021-10-28 09:06:43,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:43,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248128755] [2021-10-28 09:06:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:43,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:43,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:43,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:43,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248128755] [2021-10-28 09:06:43,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248128755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:43,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672842457] [2021-10-28 09:06:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:43,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:43,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:43,396 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:43,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:06:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:43,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:06:43,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:43,609 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 [2021-10-28 09:06:43,812 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 [2021-10-28 09:06:43,929 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:06:43,929 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 [2021-10-28 09:06:44,358 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:06:44,359 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 47 treesize of output 32 [2021-10-28 09:06:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:44,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672842457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:44,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:44,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-10-28 09:06:44,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821335221] [2021-10-28 09:06:44,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:06:44,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:06:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:06:44,389 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 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) [2021-10-28 09:06:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:45,154 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-10-28 09:06:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:06:45,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 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 34 [2021-10-28 09:06:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:45,155 INFO L225 Difference]: With dead ends: 85 [2021-10-28 09:06:45,155 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 09:06:45,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:06:45,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 09:06:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-10-28 09:06:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 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) [2021-10-28 09:06:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-10-28 09:06:45,158 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2021-10-28 09:06:45,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:45,159 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-10-28 09:06:45,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 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) [2021-10-28 09:06:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-10-28 09:06:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:06:45,160 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:45,160 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:06:45,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:45,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:06:45,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:45,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1542789593, now seen corresponding path program 2 times [2021-10-28 09:06:45,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:45,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746035877] [2021-10-28 09:06:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:45,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:45,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:45,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:45,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746035877] [2021-10-28 09:06:45,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746035877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:45,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228119826] [2021-10-28 09:06:45,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:06:45,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:45,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:45,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:45,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:06:45,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:06:45,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 09:06:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:45,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228119826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:45,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:45,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-28 09:06:45,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108607198] [2021-10-28 09:06:45,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 09:06:45,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:06:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:06:45,978 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 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) [2021-10-28 09:06:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:46,364 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-10-28 09:06:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:06:46,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 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 38 [2021-10-28 09:06:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:46,366 INFO L225 Difference]: With dead ends: 75 [2021-10-28 09:06:46,366 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 09:06:46,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:06:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 09:06:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-10-28 09:06:46,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.140625) internal successors, (73), 65 states have internal predecessors, (73), 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) [2021-10-28 09:06:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-10-28 09:06:46,369 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 38 [2021-10-28 09:06:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:46,371 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-10-28 09:06:46,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 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) [2021-10-28 09:06:46,371 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-10-28 09:06:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 09:06:46,372 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:46,372 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:06:46,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:46,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:46,573 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -581752220, now seen corresponding path program 1 times [2021-10-28 09:06:46,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:46,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583175154] [2021-10-28 09:06:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:46,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:46,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 09:06:46,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:46,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583175154] [2021-10-28 09:06:46,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583175154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:06:46,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:06:46,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 09:06:46,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820406220] [2021-10-28 09:06:46,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 09:06:46,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:06:46,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:06:46,818 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-28 09:06:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:47,160 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-10-28 09:06:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:06:47,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 39 [2021-10-28 09:06:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:47,162 INFO L225 Difference]: With dead ends: 94 [2021-10-28 09:06:47,162 INFO L226 Difference]: Without dead ends: 94 [2021-10-28 09:06:47,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:06:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-28 09:06:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-10-28 09:06:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 86 states have internal predecessors, (95), 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) [2021-10-28 09:06:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-10-28 09:06:47,166 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 39 [2021-10-28 09:06:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:47,166 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-10-28 09:06:47,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2021-10-28 09:06:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-10-28 09:06:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 09:06:47,167 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:47,167 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:06:47,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 09:06:47,167 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:47,168 INFO L85 PathProgramCache]: Analyzing trace with hash -306992606, now seen corresponding path program 1 times [2021-10-28 09:06:47,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:47,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105583267] [2021-10-28 09:06:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:47,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:47,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:06:47,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:47,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105583267] [2021-10-28 09:06:47,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105583267] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:47,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417364021] [2021-10-28 09:06:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:47,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:47,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:47,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:47,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:06:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:06:47,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:47,752 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 21 treesize of output 17 [2021-10-28 09:06:47,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:06:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:06:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417364021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:47,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:47,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 19 [2021-10-28 09:06:47,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353914002] [2021-10-28 09:06:47,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:06:47,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:06:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:06:47,874 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:48,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:48,471 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-10-28 09:06:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:06:48,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 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 39 [2021-10-28 09:06:48,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:48,473 INFO L225 Difference]: With dead ends: 123 [2021-10-28 09:06:48,473 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 09:06:48,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:06:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 09:06:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-10-28 09:06:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 90 states have internal predecessors, (100), 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) [2021-10-28 09:06:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-10-28 09:06:48,478 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 39 [2021-10-28 09:06:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:48,478 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-10-28 09:06:48,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:06:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-10-28 09:06:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-28 09:06:48,479 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:48,479 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:48,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:48,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 09:06:48,679 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash 149054821, now seen corresponding path program 2 times [2021-10-28 09:06:48,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:48,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9569810] [2021-10-28 09:06:48,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:48,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:48,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:06:48,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:48,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9569810] [2021-10-28 09:06:48,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9569810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:48,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176734532] [2021-10-28 09:06:48,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:06:48,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:48,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:48,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:48,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:06:49,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:06:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:49,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:06:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:06:49,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176734532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:49,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:49,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-10-28 09:06:49,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007037715] [2021-10-28 09:06:49,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:06:49,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:06:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:06:49,362 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 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) [2021-10-28 09:06:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:49,905 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-10-28 09:06:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:06:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 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 [2021-10-28 09:06:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:49,908 INFO L225 Difference]: With dead ends: 118 [2021-10-28 09:06:49,908 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 09:06:49,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:06:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 09:06:49,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-10-28 09:06:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 100 states have internal predecessors, (112), 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) [2021-10-28 09:06:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-10-28 09:06:49,913 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 43 [2021-10-28 09:06:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:49,913 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-10-28 09:06:49,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 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) [2021-10-28 09:06:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-10-28 09:06:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:06:49,914 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:49,915 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:49,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:50,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:50,127 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2091999503, now seen corresponding path program 3 times [2021-10-28 09:06:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:50,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300561665] [2021-10-28 09:06:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:50,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:50,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:50,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:50,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300561665] [2021-10-28 09:06:50,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300561665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:50,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371974413] [2021-10-28 09:06:50,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:06:50,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:50,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:50,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:50,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:06:50,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:06:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:06:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:06:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:50,950 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:06:50,950 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 [2021-10-28 09:06:51,494 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 27 treesize of output 23 [2021-10-28 09:06:51,622 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-10-28 09:06:51,622 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 43 treesize of output 42 [2021-10-28 09:06:53,460 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-10-28 09:06:53,461 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 61 treesize of output 45 [2021-10-28 09:06:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:06:53,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371974413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:53,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:53,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-10-28 09:06:53,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470090550] [2021-10-28 09:06:53,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:06:53,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:06:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:06:53,485 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2021-10-28 09:06:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:54,820 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-10-28 09:06:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:06:54,822 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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 46 [2021-10-28 09:06:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:54,823 INFO L225 Difference]: With dead ends: 138 [2021-10-28 09:06:54,823 INFO L226 Difference]: Without dead ends: 116 [2021-10-28 09:06:54,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:06:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-28 09:06:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-10-28 09:06:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 104 states have internal predecessors, (116), 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) [2021-10-28 09:06:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-10-28 09:06:54,828 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 46 [2021-10-28 09:06:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-10-28 09:06:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 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) [2021-10-28 09:06:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-10-28 09:06:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 09:06:54,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:54,829 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:54,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:06:55,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:55,039 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:06:55,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:06:55,040 INFO L85 PathProgramCache]: Analyzing trace with hash 357600627, now seen corresponding path program 1 times [2021-10-28 09:06:55,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:06:55,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834510359] [2021-10-28 09:06:55,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:55,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:06:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:55,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:06:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:55,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:06:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834510359] [2021-10-28 09:06:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834510359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:55,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714148519] [2021-10-28 09:06:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:06:55,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:06:55,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:06:55,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:06:55,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:06:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:06:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:06:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:06:56,053 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:06:56,054 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 [2021-10-28 09:06:56,550 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 21 treesize of output 17 [2021-10-28 09:06:56,633 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-10-28 09:06:56,634 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 38 treesize of output 37 [2021-10-28 09:06:57,643 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-28 09:06:57,644 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 57 treesize of output 40 [2021-10-28 09:06:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:06:57,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714148519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:06:57,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:06:57,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2021-10-28 09:06:57,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214888763] [2021-10-28 09:06:57,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 09:06:57,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:06:57,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 09:06:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:06:57,665 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 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) [2021-10-28 09:06:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:06:59,820 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2021-10-28 09:06:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:06:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 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 46 [2021-10-28 09:06:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:06:59,826 INFO L225 Difference]: With dead ends: 152 [2021-10-28 09:06:59,826 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 09:06:59,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=353, Invalid=3187, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 09:06:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 09:06:59,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-10-28 09:06:59,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 114 states have internal predecessors, (127), 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) [2021-10-28 09:06:59,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-10-28 09:06:59,831 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 46 [2021-10-28 09:06:59,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:06:59,831 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-10-28 09:06:59,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 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) [2021-10-28 09:06:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-10-28 09:06:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 09:06:59,832 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:06:59,833 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:06:59,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:00,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 09:07:00,047 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 947634242, now seen corresponding path program 3 times [2021-10-28 09:07:00,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:00,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210685186] [2021-10-28 09:07:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:00,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:00,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:00,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:00,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210685186] [2021-10-28 09:07:00,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210685186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:00,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34043035] [2021-10-28 09:07:00,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:07:00,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:00,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:00,365 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:00,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:07:00,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:07:00,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 09:07:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:01,004 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 21 treesize of output 17 [2021-10-28 09:07:01,349 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-10-28 09:07:01,349 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 24 treesize of output 16 [2021-10-28 09:07:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:01,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34043035] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:01,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:01,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2021-10-28 09:07:01,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062418761] [2021-10-28 09:07:01,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 09:07:01,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 09:07:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:07:01,362 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 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) [2021-10-28 09:07:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:02,363 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2021-10-28 09:07:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:07:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 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 48 [2021-10-28 09:07:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:02,365 INFO L225 Difference]: With dead ends: 167 [2021-10-28 09:07:02,365 INFO L226 Difference]: Without dead ends: 167 [2021-10-28 09:07:02,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:07:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-28 09:07:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 156. [2021-10-28 09:07:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 149 states have internal predecessors, (166), 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) [2021-10-28 09:07:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2021-10-28 09:07:02,371 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 48 [2021-10-28 09:07:02,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:02,372 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2021-10-28 09:07:02,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 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) [2021-10-28 09:07:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2021-10-28 09:07:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 09:07:02,373 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:02,373 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:02,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 09:07:02,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:07:02,587 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2061037938, now seen corresponding path program 4 times [2021-10-28 09:07:02,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:02,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059012726] [2021-10-28 09:07:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:02,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:02,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:02,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059012726] [2021-10-28 09:07:02,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059012726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:02,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386324988] [2021-10-28 09:07:02,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:07:02,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:02,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:02,754 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:02,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:07:03,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:07:03,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:03,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 09:07:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:03,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386324988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:03,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:03,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-10-28 09:07:03,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922461794] [2021-10-28 09:07:03,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:07:03,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:07:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:07:03,392 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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) [2021-10-28 09:07:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:03,899 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-10-28 09:07:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:07:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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 50 [2021-10-28 09:07:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:03,901 INFO L225 Difference]: With dead ends: 283 [2021-10-28 09:07:03,901 INFO L226 Difference]: Without dead ends: 283 [2021-10-28 09:07:03,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:07:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-28 09:07:03,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 209. [2021-10-28 09:07:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 199 states have (on average 1.120603015075377) internal successors, (223), 200 states have internal predecessors, (223), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-10-28 09:07:03,910 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 50 [2021-10-28 09:07:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:03,911 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-10-28 09:07:03,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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) [2021-10-28 09:07:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-10-28 09:07:03,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 09:07:03,912 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:03,913 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-10-28 09:07:03,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-28 09:07:04,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 09:07:04,127 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1444425936, now seen corresponding path program 2 times [2021-10-28 09:07:04,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:04,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606443811] [2021-10-28 09:07:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:04,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:04,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:04,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:04,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606443811] [2021-10-28 09:07:04,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606443811] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:04,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544413582] [2021-10-28 09:07:04,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:07:04,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:04,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:04,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:04,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:07:04,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:07:04,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:07:04,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:05,009 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 [2021-10-28 09:07:05,351 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 [2021-10-28 09:07:05,441 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:07:05,441 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 [2021-10-28 09:07:06,294 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:07:06,295 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 49 treesize of output 34 [2021-10-28 09:07:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:06,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544413582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:06,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:06,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-10-28 09:07:06,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16125390] [2021-10-28 09:07:06,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:07:06,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:07:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:07:06,320 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 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) [2021-10-28 09:07:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:07,489 INFO L93 Difference]: Finished difference Result 253 states and 276 transitions. [2021-10-28 09:07:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:07:07,500 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 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 50 [2021-10-28 09:07:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:07,502 INFO L225 Difference]: With dead ends: 253 [2021-10-28 09:07:07,502 INFO L226 Difference]: Without dead ends: 228 [2021-10-28 09:07:07,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:07:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-28 09:07:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2021-10-28 09:07:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 212 states have (on average 1.1132075471698113) internal successors, (236), 213 states have internal predecessors, (236), 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) [2021-10-28 09:07:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 243 transitions. [2021-10-28 09:07:07,510 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 243 transitions. Word has length 50 [2021-10-28 09:07:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:07,510 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 243 transitions. [2021-10-28 09:07:07,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 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) [2021-10-28 09:07:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 243 transitions. [2021-10-28 09:07:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 09:07:07,511 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:07,512 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-10-28 09:07:07,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:07,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:07:07,727 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:07,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1709703263, now seen corresponding path program 4 times [2021-10-28 09:07:07,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:07,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766373895] [2021-10-28 09:07:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:07,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:07,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:07,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:07,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766373895] [2021-10-28 09:07:07,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766373895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:07,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622734776] [2021-10-28 09:07:07,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:07:07,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:07,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:07,971 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:07,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:07:08,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:07:08,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:08,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:07:08,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:08,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622734776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:08,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:08,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-10-28 09:07:08,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229534728] [2021-10-28 09:07:08,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:07:08,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:07:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:07:08,740 INFO L87 Difference]: Start difference. First operand 221 states and 243 transitions. Second operand has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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) [2021-10-28 09:07:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:09,250 INFO L93 Difference]: Finished difference Result 272 states and 299 transitions. [2021-10-28 09:07:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:07:09,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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 52 [2021-10-28 09:07:09,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:09,253 INFO L225 Difference]: With dead ends: 272 [2021-10-28 09:07:09,253 INFO L226 Difference]: Without dead ends: 272 [2021-10-28 09:07:09,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:07:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-28 09:07:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 241. [2021-10-28 09:07:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 233 states have internal predecessors, (259), 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) [2021-10-28 09:07:09,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2021-10-28 09:07:09,262 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 52 [2021-10-28 09:07:09,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2021-10-28 09:07:09,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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) [2021-10-28 09:07:09,263 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2021-10-28 09:07:09,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 09:07:09,264 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:09,264 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-10-28 09:07:09,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:09,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:07:09,471 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1417547384, now seen corresponding path program 5 times [2021-10-28 09:07:09,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:09,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153017001] [2021-10-28 09:07:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:09,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:10,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:10,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:10,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153017001] [2021-10-28 09:07:10,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153017001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:10,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880970082] [2021-10-28 09:07:10,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:07:10,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:10,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:10,308 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:10,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:07:10,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:07:10,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:10,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-28 09:07:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:10,860 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:07:10,861 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 [2021-10-28 09:07:11,217 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 [2021-10-28 09:07:11,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:07:11,653 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 19 treesize of output 19 [2021-10-28 09:07:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:11,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880970082] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:11,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:11,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 41 [2021-10-28 09:07:11,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94435954] [2021-10-28 09:07:11,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 09:07:11,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 09:07:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:07:11,879 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 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) [2021-10-28 09:07:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:15,568 INFO L93 Difference]: Finished difference Result 338 states and 368 transitions. [2021-10-28 09:07:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 09:07:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 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 57 [2021-10-28 09:07:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:15,570 INFO L225 Difference]: With dead ends: 338 [2021-10-28 09:07:15,570 INFO L226 Difference]: Without dead ends: 316 [2021-10-28 09:07:15,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=554, Invalid=6088, Unknown=0, NotChecked=0, Total=6642 [2021-10-28 09:07:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-28 09:07:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2021-10-28 09:07:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 256 states have (on average 1.1171875) internal successors, (286), 257 states have internal predecessors, (286), 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) [2021-10-28 09:07:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2021-10-28 09:07:15,580 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 57 [2021-10-28 09:07:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:15,581 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2021-10-28 09:07:15,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 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) [2021-10-28 09:07:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2021-10-28 09:07:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 09:07:15,582 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:15,582 INFO L513 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2021-10-28 09:07:15,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:15,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:07:15,803 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -515149736, now seen corresponding path program 5 times [2021-10-28 09:07:15,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:15,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704215003] [2021-10-28 09:07:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:15,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:16,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:16,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:16,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704215003] [2021-10-28 09:07:16,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704215003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:16,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950872290] [2021-10-28 09:07:16,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:07:16,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:16,138 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:07:16,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:07:16,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:16,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-28 09:07:16,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:16,743 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:07:16,744 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 [2021-10-28 09:07:17,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-10-28 09:07:17,702 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-10-28 09:07:17,702 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 41 treesize of output 40 [2021-10-28 09:07:18,372 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 09:07:18,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2021-10-28 09:07:18,981 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-28 09:07:18,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 09:07:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:07:19,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950872290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:19,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:19,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-10-28 09:07:19,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899905280] [2021-10-28 09:07:19,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 09:07:19,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 09:07:19,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:07:19,005 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 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) [2021-10-28 09:07:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:21,533 INFO L93 Difference]: Finished difference Result 446 states and 485 transitions. [2021-10-28 09:07:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 09:07:21,533 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 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 [2021-10-28 09:07:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:21,535 INFO L225 Difference]: With dead ends: 446 [2021-10-28 09:07:21,535 INFO L226 Difference]: Without dead ends: 354 [2021-10-28 09:07:21,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=459, Invalid=5393, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 09:07:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-28 09:07:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 317. [2021-10-28 09:07:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 307 states have (on average 1.1205211726384365) internal successors, (344), 308 states have internal predecessors, (344), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 352 transitions. [2021-10-28 09:07:21,546 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 352 transitions. Word has length 58 [2021-10-28 09:07:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:21,546 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 352 transitions. [2021-10-28 09:07:21,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 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) [2021-10-28 09:07:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 352 transitions. [2021-10-28 09:07:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-28 09:07:21,548 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:21,548 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:21,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:21,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:21,763 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash -179282827, now seen corresponding path program 6 times [2021-10-28 09:07:21,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:21,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161057760] [2021-10-28 09:07:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:21,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:21,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:21,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161057760] [2021-10-28 09:07:21,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161057760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:21,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246820412] [2021-10-28 09:07:21,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:07:21,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:21,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:21,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:21,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:07:22,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:07:22,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:22,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-28 09:07:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:22,670 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:07:22,670 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 [2021-10-28 09:07:22,672 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 [2021-10-28 09:07:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:23,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246820412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:23,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:23,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-10-28 09:07:23,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353124452] [2021-10-28 09:07:23,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:07:23,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:23,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:07:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:07:23,086 INFO L87 Difference]: Start difference. First operand 317 states and 352 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:23,590 INFO L93 Difference]: Finished difference Result 376 states and 413 transitions. [2021-10-28 09:07:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:07:23,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-10-28 09:07:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:23,592 INFO L225 Difference]: With dead ends: 376 [2021-10-28 09:07:23,593 INFO L226 Difference]: Without dead ends: 376 [2021-10-28 09:07:23,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:07:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-10-28 09:07:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2021-10-28 09:07:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 354 states have (on average 1.1214689265536724) internal successors, (397), 355 states have internal predecessors, (397), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 405 transitions. [2021-10-28 09:07:23,604 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 405 transitions. Word has length 62 [2021-10-28 09:07:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:23,605 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 405 transitions. [2021-10-28 09:07:23,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 405 transitions. [2021-10-28 09:07:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 09:07:23,606 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:23,606 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-10-28 09:07:23,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:23,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:23,825 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:23,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash -867919012, now seen corresponding path program 6 times [2021-10-28 09:07:23,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:23,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038693062] [2021-10-28 09:07:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:23,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:24,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:24,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:24,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038693062] [2021-10-28 09:07:24,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038693062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:24,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143881399] [2021-10-28 09:07:24,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:07:24,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:24,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:24,150 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:24,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:07:24,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:07:24,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:24,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 09:07:24,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:24,924 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:07:24,925 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 [2021-10-28 09:07:25,205 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 14 treesize of output 10 [2021-10-28 09:07:25,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:07:25,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:07:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:25,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143881399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:25,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:25,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 33 [2021-10-28 09:07:25,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493692494] [2021-10-28 09:07:25,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:07:25,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:25,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:07:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:07:25,544 INFO L87 Difference]: Start difference. First operand 364 states and 405 transitions. Second operand has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:27,258 INFO L93 Difference]: Finished difference Result 623 states and 683 transitions. [2021-10-28 09:07:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 09:07:27,259 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-10-28 09:07:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:27,262 INFO L225 Difference]: With dead ends: 623 [2021-10-28 09:07:27,262 INFO L226 Difference]: Without dead ends: 550 [2021-10-28 09:07:27,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=400, Invalid=3890, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 09:07:27,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-10-28 09:07:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 482. [2021-10-28 09:07:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 471 states have (on average 1.1252653927813163) internal successors, (530), 472 states have internal predecessors, (530), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 539 transitions. [2021-10-28 09:07:27,281 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 539 transitions. Word has length 66 [2021-10-28 09:07:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:27,282 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 539 transitions. [2021-10-28 09:07:27,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 539 transitions. [2021-10-28 09:07:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 09:07:27,284 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:27,284 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2021-10-28 09:07:27,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:27,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:27,507 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:27,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1015556452, now seen corresponding path program 7 times [2021-10-28 09:07:27,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:27,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496817938] [2021-10-28 09:07:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:27,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:27,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:07:27,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:27,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496817938] [2021-10-28 09:07:27,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496817938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:27,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340783366] [2021-10-28 09:07:27,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:07:27,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:27,738 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:27,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:07:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:28,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:07:28,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:28,484 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:07:28,484 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 [2021-10-28 09:07:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:07:28,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340783366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:28,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:28,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-10-28 09:07:28,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2419637] [2021-10-28 09:07:28,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:07:28,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:07:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:07:28,887 INFO L87 Difference]: Start difference. First operand 482 states and 539 transitions. Second operand has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 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) [2021-10-28 09:07:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:29,525 INFO L93 Difference]: Finished difference Result 671 states and 738 transitions. [2021-10-28 09:07:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:07:29,525 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 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 66 [2021-10-28 09:07:29,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:29,529 INFO L225 Difference]: With dead ends: 671 [2021-10-28 09:07:29,529 INFO L226 Difference]: Without dead ends: 605 [2021-10-28 09:07:29,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:07:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-10-28 09:07:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 560. [2021-10-28 09:07:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 548 states have (on average 1.1222627737226278) internal successors, (615), 549 states have internal predecessors, (615), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 625 transitions. [2021-10-28 09:07:29,546 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 625 transitions. Word has length 66 [2021-10-28 09:07:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:29,546 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 625 transitions. [2021-10-28 09:07:29,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 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) [2021-10-28 09:07:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 625 transitions. [2021-10-28 09:07:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 09:07:29,548 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:29,548 INFO L513 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1] [2021-10-28 09:07:29,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:29,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-28 09:07:29,759 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:29,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:29,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2006443839, now seen corresponding path program 7 times [2021-10-28 09:07:29,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:29,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076504703] [2021-10-28 09:07:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:29,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:30,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:30,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:30,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076504703] [2021-10-28 09:07:30,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076504703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:30,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976803049] [2021-10-28 09:07:30,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:07:30,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:30,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:30,151 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:30,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:07:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 09:07:31,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:31,617 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 21 treesize of output 17 [2021-10-28 09:07:31,702 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-10-28 09:07:31,703 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 28 treesize of output 27 [2021-10-28 09:07:32,600 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-28 09:07:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 09:07:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:32,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976803049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:32,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:32,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 39 [2021-10-28 09:07:32,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271811185] [2021-10-28 09:07:32,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 09:07:32,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 09:07:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:07:32,620 INFO L87 Difference]: Start difference. First operand 560 states and 625 transitions. Second operand has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 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) [2021-10-28 09:07:34,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:34,846 INFO L93 Difference]: Finished difference Result 944 states and 1040 transitions. [2021-10-28 09:07:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-28 09:07:34,847 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 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 70 [2021-10-28 09:07:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:34,851 INFO L225 Difference]: With dead ends: 944 [2021-10-28 09:07:34,851 INFO L226 Difference]: Without dead ends: 684 [2021-10-28 09:07:34,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=411, Invalid=5441, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 09:07:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-10-28 09:07:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 620. [2021-10-28 09:07:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 607 states have (on average 1.1219110378912684) internal successors, (681), 608 states have internal predecessors, (681), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 692 transitions. [2021-10-28 09:07:34,874 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 692 transitions. Word has length 70 [2021-10-28 09:07:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:34,874 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 692 transitions. [2021-10-28 09:07:34,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 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) [2021-10-28 09:07:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 692 transitions. [2021-10-28 09:07:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 09:07:34,876 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:34,876 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2021-10-28 09:07:34,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:35,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 09:07:35,103 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:35,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash -613552583, now seen corresponding path program 8 times [2021-10-28 09:07:35,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:35,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805701474] [2021-10-28 09:07:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:35,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:35,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:35,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:35,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805701474] [2021-10-28 09:07:35,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805701474] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:35,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268626901] [2021-10-28 09:07:35,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:07:35,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:35,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:35,456 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:35,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:07:36,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:07:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:36,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 09:07:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:36,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268626901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:36,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:36,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 30 [2021-10-28 09:07:36,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81720463] [2021-10-28 09:07:36,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:07:36,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:07:36,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:07:36,728 INFO L87 Difference]: Start difference. First operand 620 states and 692 transitions. Second operand has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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) [2021-10-28 09:07:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:37,691 INFO L93 Difference]: Finished difference Result 762 states and 845 transitions. [2021-10-28 09:07:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:07:37,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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 70 [2021-10-28 09:07:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:37,696 INFO L225 Difference]: With dead ends: 762 [2021-10-28 09:07:37,696 INFO L226 Difference]: Without dead ends: 762 [2021-10-28 09:07:37,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:07:37,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-10-28 09:07:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 655. [2021-10-28 09:07:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 642 states have (on average 1.1246105919003115) internal successors, (722), 643 states have internal predecessors, (722), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 733 transitions. [2021-10-28 09:07:37,718 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 733 transitions. Word has length 70 [2021-10-28 09:07:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 733 transitions. [2021-10-28 09:07:37,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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) [2021-10-28 09:07:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 733 transitions. [2021-10-28 09:07:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-28 09:07:37,721 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:37,721 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:07:37,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:37,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 09:07:37,939 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:37,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1953664988, now seen corresponding path program 8 times [2021-10-28 09:07:37,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:37,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830940164] [2021-10-28 09:07:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:37,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:38,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:38,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830940164] [2021-10-28 09:07:38,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830940164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:38,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970926622] [2021-10-28 09:07:38,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:07:38,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:38,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:38,208 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:38,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:07:39,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:07:39,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:39,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-28 09:07:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:39,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970926622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:39,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:39,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-10-28 09:07:39,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102669345] [2021-10-28 09:07:39,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:07:39,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:07:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:07:39,826 INFO L87 Difference]: Start difference. First operand 655 states and 733 transitions. Second operand has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 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) [2021-10-28 09:07:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:40,606 INFO L93 Difference]: Finished difference Result 765 states and 850 transitions. [2021-10-28 09:07:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:07:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 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 74 [2021-10-28 09:07:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:40,611 INFO L225 Difference]: With dead ends: 765 [2021-10-28 09:07:40,611 INFO L226 Difference]: Without dead ends: 765 [2021-10-28 09:07:40,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:07:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-10-28 09:07:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 748. [2021-10-28 09:07:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 735 states have (on average 1.125170068027211) internal successors, (827), 736 states have internal predecessors, (827), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 838 transitions. [2021-10-28 09:07:40,650 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 838 transitions. Word has length 74 [2021-10-28 09:07:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:40,651 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 838 transitions. [2021-10-28 09:07:40,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 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) [2021-10-28 09:07:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 838 transitions. [2021-10-28 09:07:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 09:07:40,653 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:40,653 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-10-28 09:07:40,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:40,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:40,879 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1045914642, now seen corresponding path program 9 times [2021-10-28 09:07:40,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:40,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562505906] [2021-10-28 09:07:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:40,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:41,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:07:41,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:41,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562505906] [2021-10-28 09:07:41,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562505906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:41,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125363133] [2021-10-28 09:07:41,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:07:41,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:41,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:41,263 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:07:42,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:07:42,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:42,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 09:07:42,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:42,608 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:07:42,609 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 [2021-10-28 09:07:42,844 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 [2021-10-28 09:07:43,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:07:43,319 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 28 treesize of output 28 [2021-10-28 09:07:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-28 09:07:43,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125363133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:43,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:43,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 34 [2021-10-28 09:07:43,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621085100] [2021-10-28 09:07:43,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-28 09:07:43,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-28 09:07:43,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:07:43,467 INFO L87 Difference]: Start difference. First operand 748 states and 838 transitions. Second operand has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 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) [2021-10-28 09:07:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:07:48,216 INFO L93 Difference]: Finished difference Result 1142 states and 1256 transitions. [2021-10-28 09:07:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-28 09:07:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 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 75 [2021-10-28 09:07:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:07:48,220 INFO L225 Difference]: With dead ends: 1142 [2021-10-28 09:07:48,220 INFO L226 Difference]: Without dead ends: 803 [2021-10-28 09:07:48,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1025, Invalid=8677, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 09:07:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-10-28 09:07:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 616. [2021-10-28 09:07:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 606 states have (on average 1.1155115511551155) internal successors, (676), 606 states have internal predecessors, (676), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:07:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 685 transitions. [2021-10-28 09:07:48,239 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 685 transitions. Word has length 75 [2021-10-28 09:07:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:07:48,240 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 685 transitions. [2021-10-28 09:07:48,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 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) [2021-10-28 09:07:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 685 transitions. [2021-10-28 09:07:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 09:07:48,242 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:07:48,242 INFO L513 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1] [2021-10-28 09:07:48,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:07:48,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 09:07:48,455 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:07:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:07:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash -27278426, now seen corresponding path program 9 times [2021-10-28 09:07:48,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:07:48,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095576468] [2021-10-28 09:07:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:07:48,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:07:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:07:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:07:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:48,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:07:48,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095576468] [2021-10-28 09:07:48,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095576468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:48,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467250547] [2021-10-28 09:07:48,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:07:48,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:07:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:07:48,891 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:07:48,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:07:49,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:07:49,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:07:49,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 09:07:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:07:49,892 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 [2021-10-28 09:07:50,225 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 [2021-10-28 09:07:50,276 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:07:50,277 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 [2021-10-28 09:07:51,465 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:07:51,465 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 [2021-10-28 09:07:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:07:51,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467250547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:07:51,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:07:51,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-10-28 09:07:51,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838810093] [2021-10-28 09:07:51,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 09:07:51,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:07:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 09:07:51,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:07:51,504 INFO L87 Difference]: Start difference. First operand 616 states and 685 transitions. Second operand has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 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) [2021-10-28 09:08:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:08:25,890 INFO L93 Difference]: Finished difference Result 1106 states and 1221 transitions. [2021-10-28 09:08:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 09:08:25,890 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 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 82 [2021-10-28 09:08:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:08:25,892 INFO L225 Difference]: With dead ends: 1106 [2021-10-28 09:08:25,893 INFO L226 Difference]: Without dead ends: 630 [2021-10-28 09:08:25,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 09:08:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-10-28 09:08:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 624. [2021-10-28 09:08:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 614 states have (on average 1.1140065146579805) internal successors, (684), 614 states have internal predecessors, (684), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:08:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 693 transitions. [2021-10-28 09:08:25,907 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 693 transitions. Word has length 82 [2021-10-28 09:08:25,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:08:25,907 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 693 transitions. [2021-10-28 09:08:25,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 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) [2021-10-28 09:08:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 693 transitions. [2021-10-28 09:08:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 09:08:25,909 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:08:25,909 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:08:25,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-28 09:08:26,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 09:08:26,122 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:08:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:08:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash -958830397, now seen corresponding path program 10 times [2021-10-28 09:08:26,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:08:26,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443227196] [2021-10-28 09:08:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:08:26,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:08:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:26,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:08:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 32 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:26,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:08:26,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443227196] [2021-10-28 09:08:26,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443227196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:26,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95806832] [2021-10-28 09:08:26,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:08:26,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:08:26,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:08:26,451 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:08:26,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:08:27,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:08:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:08:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 09:08:27,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:08:27,963 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:27,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95806832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:27,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:08:27,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-28 09:08:27,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799802697] [2021-10-28 09:08:27,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 09:08:27,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:08:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 09:08:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:08:27,965 INFO L87 Difference]: Start difference. First operand 624 states and 693 transitions. Second operand has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 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) [2021-10-28 09:08:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:08:28,749 INFO L93 Difference]: Finished difference Result 737 states and 817 transitions. [2021-10-28 09:08:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:08:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 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 86 [2021-10-28 09:08:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:08:28,753 INFO L225 Difference]: With dead ends: 737 [2021-10-28 09:08:28,753 INFO L226 Difference]: Without dead ends: 737 [2021-10-28 09:08:28,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:08:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-10-28 09:08:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 723. [2021-10-28 09:08:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 713 states have (on average 1.1136044880785414) internal successors, (794), 713 states have internal predecessors, (794), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:08:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 803 transitions. [2021-10-28 09:08:28,767 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 803 transitions. Word has length 86 [2021-10-28 09:08:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:08:28,767 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 803 transitions. [2021-10-28 09:08:28,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 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) [2021-10-28 09:08:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 803 transitions. [2021-10-28 09:08:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 09:08:28,769 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:08:28,769 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:08:28,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 09:08:28,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 09:08:28,987 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:08:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:08:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash 305055117, now seen corresponding path program 11 times [2021-10-28 09:08:28,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:08:28,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394957126] [2021-10-28 09:08:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:08:28,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:08:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:29,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:08:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:29,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:08:29,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394957126] [2021-10-28 09:08:29,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394957126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:29,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401657628] [2021-10-28 09:08:29,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:08:29,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:08:29,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:08:29,543 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:08:29,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:08:30,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-28 09:08:30,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:08:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-28 09:08:30,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:08:30,831 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 [2021-10-28 09:08:31,368 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 [2021-10-28 09:08:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-28 09:08:33,809 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:08:33,809 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 49 treesize of output 34 [2021-10-28 09:08:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:33,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401657628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:33,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:08:33,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-10-28 09:08:33,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171327347] [2021-10-28 09:08:33,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 09:08:33,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:08:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 09:08:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1870, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:08:33,830 INFO L87 Difference]: Start difference. First operand 723 states and 803 transitions. Second operand has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 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) [2021-10-28 09:08:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:08:36,663 INFO L93 Difference]: Finished difference Result 1312 states and 1449 transitions. [2021-10-28 09:08:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:08:36,664 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 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 94 [2021-10-28 09:08:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:08:36,667 INFO L225 Difference]: With dead ends: 1312 [2021-10-28 09:08:36,667 INFO L226 Difference]: Without dead ends: 737 [2021-10-28 09:08:36,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=289, Invalid=4267, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 09:08:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-10-28 09:08:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 731. [2021-10-28 09:08:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 721 states have (on average 1.1123439667128987) internal successors, (802), 721 states have internal predecessors, (802), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:08:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 811 transitions. [2021-10-28 09:08:36,681 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 811 transitions. Word has length 94 [2021-10-28 09:08:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:08:36,681 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 811 transitions. [2021-10-28 09:08:36,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 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) [2021-10-28 09:08:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 811 transitions. [2021-10-28 09:08:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-28 09:08:36,683 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:08:36,684 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:08:36,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-28 09:08:36,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 09:08:36,895 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:08:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:08:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1697687338, now seen corresponding path program 12 times [2021-10-28 09:08:36,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:08:36,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169015470] [2021-10-28 09:08:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:08:36,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:08:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:37,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:08:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 50 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:37,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:08:37,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169015470] [2021-10-28 09:08:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169015470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:37,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562123544] [2021-10-28 09:08:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:08:37,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:08:37,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:08:37,232 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:08:37,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 09:08:38,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-28 09:08:38,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:08:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-28 09:08:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:08:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 72 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:39,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562123544] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:39,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:08:39,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-10-28 09:08:39,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037937574] [2021-10-28 09:08:39,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-28 09:08:39,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:08:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-28 09:08:39,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:08:39,109 INFO L87 Difference]: Start difference. First operand 731 states and 811 transitions. Second operand has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 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) [2021-10-28 09:08:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:08:40,233 INFO L93 Difference]: Finished difference Result 844 states and 935 transitions. [2021-10-28 09:08:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:08:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 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 98 [2021-10-28 09:08:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:08:40,236 INFO L225 Difference]: With dead ends: 844 [2021-10-28 09:08:40,237 INFO L226 Difference]: Without dead ends: 844 [2021-10-28 09:08:40,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=2592, Unknown=0, NotChecked=0, Total=2970 [2021-10-28 09:08:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-10-28 09:08:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 830. [2021-10-28 09:08:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 820 states have (on average 1.1121951219512196) internal successors, (912), 820 states have internal predecessors, (912), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:08:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 921 transitions. [2021-10-28 09:08:40,251 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 921 transitions. Word has length 98 [2021-10-28 09:08:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:08:40,252 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 921 transitions. [2021-10-28 09:08:40,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 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) [2021-10-28 09:08:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 921 transitions. [2021-10-28 09:08:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:08:40,254 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:08:40,254 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:08:40,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-28 09:08:40,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:08:40,479 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:08:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:08:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1544508172, now seen corresponding path program 13 times [2021-10-28 09:08:40,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:08:40,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894552433] [2021-10-28 09:08:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:08:40,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:08:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:41,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:08:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:41,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:08:41,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894552433] [2021-10-28 09:08:41,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894552433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:41,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066162217] [2021-10-28 09:08:41,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:08:41,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:08:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:08:41,088 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:08:41,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 09:08:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:08:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-28 09:08:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:08:42,492 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:08:42,492 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 [2021-10-28 09:08:43,022 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:08:43,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-10-28 09:08:43,279 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 [2021-10-28 09:08:43,349 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:08:43,349 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 38 treesize of output 37 [2021-10-28 09:08:46,223 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-10-28 09:08:46,223 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 46 treesize of output 32 [2021-10-28 09:08:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:08:46,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066162217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:08:46,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:08:46,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 50 [2021-10-28 09:08:46,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269910630] [2021-10-28 09:08:46,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-28 09:08:46,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:08:46,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-28 09:08:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2021-10-28 09:08:46,242 INFO L87 Difference]: Start difference. First operand 830 states and 921 transitions. Second operand has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 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) [2021-10-28 09:08:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:08:59,683 INFO L93 Difference]: Finished difference Result 1524 states and 1683 transitions. [2021-10-28 09:08:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:08:59,684 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 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 106 [2021-10-28 09:08:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:08:59,688 INFO L225 Difference]: With dead ends: 1524 [2021-10-28 09:08:59,688 INFO L226 Difference]: Without dead ends: 847 [2021-10-28 09:08:59,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=411, Invalid=7418, Unknown=3, NotChecked=0, Total=7832 [2021-10-28 09:08:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-10-28 09:08:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 838. [2021-10-28 09:08:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 828 states have (on average 1.1111111111111112) internal successors, (920), 828 states have internal predecessors, (920), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:08:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 929 transitions. [2021-10-28 09:08:59,706 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 929 transitions. Word has length 106 [2021-10-28 09:08:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:08:59,706 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 929 transitions. [2021-10-28 09:08:59,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 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) [2021-10-28 09:08:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 929 transitions. [2021-10-28 09:08:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-28 09:08:59,708 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:08:59,708 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:08:59,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:08:59,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-28 09:08:59,923 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:08:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:08:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash -326890735, now seen corresponding path program 14 times [2021-10-28 09:08:59,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:08:59,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63432154] [2021-10-28 09:08:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:08:59,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:08:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:00,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:09:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:00,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:09:00,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63432154] [2021-10-28 09:09:00,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63432154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:00,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786226391] [2021-10-28 09:09:00,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:09:00,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:00,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:09:00,317 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:09:00,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 09:09:01,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:09:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:09:01,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-28 09:09:01,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:09:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 91 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:02,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786226391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:02,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:09:02,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-10-28 09:09:02,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724783119] [2021-10-28 09:09:02,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 09:09:02,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:09:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 09:09:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:09:02,438 INFO L87 Difference]: Start difference. First operand 838 states and 929 transitions. Second operand has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 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) [2021-10-28 09:09:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:09:03,457 INFO L93 Difference]: Finished difference Result 951 states and 1053 transitions. [2021-10-28 09:09:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:09:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 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 110 [2021-10-28 09:09:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:09:03,461 INFO L225 Difference]: With dead ends: 951 [2021-10-28 09:09:03,461 INFO L226 Difference]: Without dead ends: 951 [2021-10-28 09:09:03,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:09:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-28 09:09:03,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 937. [2021-10-28 09:09:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 927 states have (on average 1.1111111111111112) internal successors, (1030), 927 states have internal predecessors, (1030), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:09:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1039 transitions. [2021-10-28 09:09:03,476 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1039 transitions. Word has length 110 [2021-10-28 09:09:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:09:03,477 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1039 transitions. [2021-10-28 09:09:03,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 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) [2021-10-28 09:09:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1039 transitions. [2021-10-28 09:09:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 09:09:03,479 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:09:03,479 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:09:03,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:09:03,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:03,697 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:09:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:09:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1760639451, now seen corresponding path program 15 times [2021-10-28 09:09:03,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:09:03,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622399461] [2021-10-28 09:09:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:09:03,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:09:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:04,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:09:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:04,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:09:04,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622399461] [2021-10-28 09:09:04,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622399461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:04,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104427212] [2021-10-28 09:09:04,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:09:04,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:04,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:09:04,362 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:09:04,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 09:09:05,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-28 09:09:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:09:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-28 09:09:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:09:05,969 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:09:05,970 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 [2021-10-28 09:09:05,983 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 [2021-10-28 09:09:07,268 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 [2021-10-28 09:09:07,347 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-10-28 09:09:07,347 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 [2021-10-28 09:09:09,240 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-10-28 09:09:09,240 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 51 treesize of output 33 [2021-10-28 09:09:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:09,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104427212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:09,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:09:09,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2021-10-28 09:09:09,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936165713] [2021-10-28 09:09:09,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 09:09:09,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:09:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 09:09:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:09:09,260 INFO L87 Difference]: Start difference. First operand 937 states and 1039 transitions. Second operand has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 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) [2021-10-28 09:09:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:09:13,486 INFO L93 Difference]: Finished difference Result 1791 states and 1971 transitions. [2021-10-28 09:09:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-28 09:09:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 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 118 [2021-10-28 09:09:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:09:13,490 INFO L225 Difference]: With dead ends: 1791 [2021-10-28 09:09:13,490 INFO L226 Difference]: Without dead ends: 954 [2021-10-28 09:09:13,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=543, Invalid=10799, Unknown=0, NotChecked=0, Total=11342 [2021-10-28 09:09:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-10-28 09:09:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 945. [2021-10-28 09:09:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 935 states have (on average 1.1101604278074866) internal successors, (1038), 935 states have internal predecessors, (1038), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:09:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1047 transitions. [2021-10-28 09:09:13,507 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1047 transitions. Word has length 118 [2021-10-28 09:09:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:09:13,507 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1047 transitions. [2021-10-28 09:09:13,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 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) [2021-10-28 09:09:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1047 transitions. [2021-10-28 09:09:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-28 09:09:13,510 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:09:13,510 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:09:13,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:09:13,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-28 09:09:13,732 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:09:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:09:13,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1908452232, now seen corresponding path program 16 times [2021-10-28 09:09:13,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:09:13,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737326658] [2021-10-28 09:09:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:09:13,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:09:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:09:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 98 proven. 295 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:14,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:09:14,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737326658] [2021-10-28 09:09:14,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737326658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:14,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505210998] [2021-10-28 09:09:14,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:09:14,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:14,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:09:14,195 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:09:14,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 09:09:15,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:09:15,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:09:15,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 09:09:15,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:09:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:16,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505210998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:16,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:09:16,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 37 [2021-10-28 09:09:16,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470565040] [2021-10-28 09:09:16,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 09:09:16,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:09:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 09:09:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:09:16,717 INFO L87 Difference]: Start difference. First operand 945 states and 1047 transitions. Second operand has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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) [2021-10-28 09:09:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:09:17,949 INFO L93 Difference]: Finished difference Result 1058 states and 1171 transitions. [2021-10-28 09:09:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:09:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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 122 [2021-10-28 09:09:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:09:17,954 INFO L225 Difference]: With dead ends: 1058 [2021-10-28 09:09:17,954 INFO L226 Difference]: Without dead ends: 1058 [2021-10-28 09:09:17,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=293, Invalid=2257, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:09:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-10-28 09:09:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1044. [2021-10-28 09:09:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1034 states have (on average 1.1102514506769825) internal successors, (1148), 1034 states have internal predecessors, (1148), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:09:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1157 transitions. [2021-10-28 09:09:17,972 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1157 transitions. Word has length 122 [2021-10-28 09:09:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:09:17,972 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1157 transitions. [2021-10-28 09:09:17,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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) [2021-10-28 09:09:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1157 transitions. [2021-10-28 09:09:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 09:09:17,975 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:09:17,976 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:09:18,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 09:09:18,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:18,203 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:09:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:09:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1255943234, now seen corresponding path program 17 times [2021-10-28 09:09:18,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:09:18,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965747339] [2021-10-28 09:09:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:09:18,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:09:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:18,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:09:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:18,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:09:18,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965747339] [2021-10-28 09:09:18,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965747339] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:18,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285358301] [2021-10-28 09:09:18,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:09:18,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:09:18,995 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:09:18,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 09:09:20,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-28 09:09:20,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:09:20,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 143 conjunts are in the unsatisfiable core [2021-10-28 09:09:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:09:21,579 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 21 treesize of output 17 [2021-10-28 09:09:21,672 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:09:21,672 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 31 treesize of output 30 [2021-10-28 09:09:24,475 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-28 09:09:24,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 09:09:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:24,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285358301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:24,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:09:24,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 37] total 63 [2021-10-28 09:09:24,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282562600] [2021-10-28 09:09:24,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-28 09:09:24,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:09:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-28 09:09:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3755, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:09:24,494 INFO L87 Difference]: Start difference. First operand 1044 states and 1157 transitions. Second operand has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 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) [2021-10-28 09:09:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:09:29,484 INFO L93 Difference]: Finished difference Result 2504 states and 2769 transitions. [2021-10-28 09:09:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 09:09:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 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 130 [2021-10-28 09:09:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:09:29,493 INFO L225 Difference]: With dead ends: 2504 [2021-10-28 09:09:29,493 INFO L226 Difference]: Without dead ends: 1058 [2021-10-28 09:09:29,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=572, Invalid=12768, Unknown=0, NotChecked=0, Total=13340 [2021-10-28 09:09:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-10-28 09:09:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1052. [2021-10-28 09:09:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1042 states have (on average 1.109404990403071) internal successors, (1156), 1042 states have internal predecessors, (1156), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:09:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1165 transitions. [2021-10-28 09:09:29,506 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1165 transitions. Word has length 130 [2021-10-28 09:09:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:09:29,506 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1165 transitions. [2021-10-28 09:09:29,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 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) [2021-10-28 09:09:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1165 transitions. [2021-10-28 09:09:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-28 09:09:29,508 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:09:29,509 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:09:29,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:09:29,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:29,723 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:09:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:09:29,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2144451745, now seen corresponding path program 18 times [2021-10-28 09:09:29,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:09:29,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519866341] [2021-10-28 09:09:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:09:29,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:09:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:30,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:09:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 128 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:30,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:09:30,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519866341] [2021-10-28 09:09:30,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519866341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:30,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26424232] [2021-10-28 09:09:30,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:09:30,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:09:30,299 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:09:30,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-28 09:09:32,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-28 09:09:32,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:09:32,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 09:09:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:09:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 162 proven. 334 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:33,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26424232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:33,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:09:33,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 50 [2021-10-28 09:09:33,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130932793] [2021-10-28 09:09:33,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 09:09:33,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:09:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 09:09:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2212, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:09:33,426 INFO L87 Difference]: Start difference. First operand 1052 states and 1165 transitions. Second operand has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 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) [2021-10-28 09:09:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:09:35,194 INFO L93 Difference]: Finished difference Result 1165 states and 1289 transitions. [2021-10-28 09:09:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 09:09:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 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 134 [2021-10-28 09:09:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:09:35,199 INFO L225 Difference]: With dead ends: 1165 [2021-10-28 09:09:35,199 INFO L226 Difference]: Without dead ends: 1165 [2021-10-28 09:09:35,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=633, Invalid=4623, Unknown=0, NotChecked=0, Total=5256 [2021-10-28 09:09:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-10-28 09:09:35,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1151. [2021-10-28 09:09:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1141 states have (on average 1.1095530236634532) internal successors, (1266), 1141 states have internal predecessors, (1266), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:09:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1275 transitions. [2021-10-28 09:09:35,212 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1275 transitions. Word has length 134 [2021-10-28 09:09:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:09:35,213 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1275 transitions. [2021-10-28 09:09:35,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 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) [2021-10-28 09:09:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1275 transitions. [2021-10-28 09:09:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-28 09:09:35,215 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:09:35,215 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:09:35,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-28 09:09:35,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-28 09:09:35,427 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:09:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:09:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash -675462103, now seen corresponding path program 19 times [2021-10-28 09:09:35,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:09:35,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714930365] [2021-10-28 09:09:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:09:35,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:09:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:36,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:09:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:36,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:09:36,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714930365] [2021-10-28 09:09:36,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714930365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:36,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932035772] [2021-10-28 09:09:36,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:09:36,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:09:36,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:09:36,268 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:09:36,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-28 09:09:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:09:38,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 120 conjunts are in the unsatisfiable core [2021-10-28 09:09:38,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:09:38,620 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 [2021-10-28 09:09:39,315 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 [2021-10-28 09:09:39,382 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:09:39,382 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 [2021-10-28 09:09:41,826 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:09:41,826 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 [2021-10-28 09:09:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:09:41,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932035772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:09:41,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:09:41,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2021-10-28 09:09:41,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141947876] [2021-10-28 09:09:41,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-28 09:09:41,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:09:41,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-28 09:09:41,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 09:09:41,845 INFO L87 Difference]: Start difference. First operand 1151 states and 1275 transitions. Second operand has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 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) [2021-10-28 09:10:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:10:38,097 INFO L93 Difference]: Finished difference Result 2136 states and 2361 transitions. [2021-10-28 09:10:38,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:10:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 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 142 [2021-10-28 09:10:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:10:38,101 INFO L225 Difference]: With dead ends: 2136 [2021-10-28 09:10:38,101 INFO L226 Difference]: Without dead ends: 1165 [2021-10-28 09:10:38,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=363, Invalid=7469, Unknown=0, NotChecked=0, Total=7832 [2021-10-28 09:10:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-10-28 09:10:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1159. [2021-10-28 09:10:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1149 states have (on average 1.1087902523933855) internal successors, (1274), 1149 states have internal predecessors, (1274), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:10:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1283 transitions. [2021-10-28 09:10:38,115 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1283 transitions. Word has length 142 [2021-10-28 09:10:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:10:38,116 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1283 transitions. [2021-10-28 09:10:38,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 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) [2021-10-28 09:10:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1283 transitions. [2021-10-28 09:10:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-28 09:10:38,118 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:10:38,119 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:10:38,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-28 09:10:38,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-28 09:10:38,331 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:10:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:10:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1820104646, now seen corresponding path program 20 times [2021-10-28 09:10:38,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:10:38,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132279826] [2021-10-28 09:10:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:10:38,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:10:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:10:38,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:10:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:10:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 162 proven. 449 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:10:38,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:10:38,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132279826] [2021-10-28 09:10:38,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132279826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:10:38,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506771973] [2021-10-28 09:10:38,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:10:38,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:10:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:10:38,929 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:10:38,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-28 09:10:41,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:10:41,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:10:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-28 09:10:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:10:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 190 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:10:42,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506771973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:10:42,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:10:42,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 44 [2021-10-28 09:10:42,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949517075] [2021-10-28 09:10:42,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-28 09:10:42,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:10:42,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-28 09:10:42,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:10:42,049 INFO L87 Difference]: Start difference. First operand 1159 states and 1283 transitions. Second operand has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 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) [2021-10-28 09:10:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:10:43,652 INFO L93 Difference]: Finished difference Result 1272 states and 1407 transitions. [2021-10-28 09:10:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:10:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 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 146 [2021-10-28 09:10:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:10:43,657 INFO L225 Difference]: With dead ends: 1272 [2021-10-28 09:10:43,657 INFO L226 Difference]: Without dead ends: 1272 [2021-10-28 09:10:43,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 09:10:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-10-28 09:10:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1258. [2021-10-28 09:10:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1248 states have (on average 1.108974358974359) internal successors, (1384), 1248 states have internal predecessors, (1384), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:10:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1393 transitions. [2021-10-28 09:10:43,672 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1393 transitions. Word has length 146 [2021-10-28 09:10:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:10:43,672 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1393 transitions. [2021-10-28 09:10:43,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 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) [2021-10-28 09:10:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1393 transitions. [2021-10-28 09:10:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-28 09:10:43,674 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:10:43,675 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:10:43,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-28 09:10:43,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 09:10:43,899 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:10:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:10:43,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1308606064, now seen corresponding path program 21 times [2021-10-28 09:10:43,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:10:43,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004583648] [2021-10-28 09:10:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:10:43,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:10:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:10:44,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:10:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:10:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:10:44,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:10:44,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004583648] [2021-10-28 09:10:44,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004583648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:10:44,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389273843] [2021-10-28 09:10:44,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:10:44,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:10:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:10:44,882 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:10:44,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 09:10:47,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-28 09:10:47,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:10:47,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 163 conjunts are in the unsatisfiable core [2021-10-28 09:10:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:10:47,394 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:10:47,394 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 [2021-10-28 09:10:49,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-10-28 09:10:49,413 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-10-28 09:10:49,413 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 42 treesize of output 41 [2021-10-28 09:10:54,066 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:10:54,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2021-10-28 09:10:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:10:54,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389273843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:10:54,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:10:54,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-10-28 09:10:54,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712889388] [2021-10-28 09:10:54,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-28 09:10:54,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:10:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-28 09:10:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4124, Unknown=0, NotChecked=0, Total=4290 [2021-10-28 09:10:54,312 INFO L87 Difference]: Start difference. First operand 1258 states and 1393 transitions. Second operand has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 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) [2021-10-28 09:11:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:00,872 INFO L93 Difference]: Finished difference Result 2433 states and 2679 transitions. [2021-10-28 09:11:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-28 09:11:00,872 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 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 154 [2021-10-28 09:11:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:00,877 INFO L225 Difference]: With dead ends: 2433 [2021-10-28 09:11:00,877 INFO L226 Difference]: Without dead ends: 1275 [2021-10-28 09:11:00,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4709 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=677, Invalid=17683, Unknown=0, NotChecked=0, Total=18360 [2021-10-28 09:11:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-10-28 09:11:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1266. [2021-10-28 09:11:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1256 states have (on average 1.10828025477707) internal successors, (1392), 1256 states have internal predecessors, (1392), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:11:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1401 transitions. [2021-10-28 09:11:00,893 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1401 transitions. Word has length 154 [2021-10-28 09:11:00,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:00,894 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1401 transitions. [2021-10-28 09:11:00,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 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) [2021-10-28 09:11:00,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1401 transitions. [2021-10-28 09:11:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-10-28 09:11:00,896 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:00,897 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:00,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:01,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 09:11:01,111 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:11:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash -508161619, now seen corresponding path program 22 times [2021-10-28 09:11:01,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:01,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349208774] [2021-10-28 09:11:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:01,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:01,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:11:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 200 proven. 538 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:11:01,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:01,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349208774] [2021-10-28 09:11:01,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349208774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:01,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931271276] [2021-10-28 09:11:01,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:11:01,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:01,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:01,783 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:01,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-28 09:11:04,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:11:04,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 114 conjunts are in the unsatisfiable core [2021-10-28 09:11:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 242 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:11:05,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931271276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:05,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:05,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 46 [2021-10-28 09:11:05,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983387562] [2021-10-28 09:11:05,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-28 09:11:05,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:05,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-28 09:11:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:11:05,307 INFO L87 Difference]: Start difference. First operand 1266 states and 1401 transitions. Second operand has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 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) [2021-10-28 09:11:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:07,127 INFO L93 Difference]: Finished difference Result 1379 states and 1525 transitions. [2021-10-28 09:11:07,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:11:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 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 158 [2021-10-28 09:11:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:07,133 INFO L225 Difference]: With dead ends: 1379 [2021-10-28 09:11:07,133 INFO L226 Difference]: Without dead ends: 1379 [2021-10-28 09:11:07,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=428, Invalid=3478, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:11:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-10-28 09:11:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1365. [2021-10-28 09:11:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1355 states have (on average 1.1084870848708488) internal successors, (1502), 1355 states have internal predecessors, (1502), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:11:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1511 transitions. [2021-10-28 09:11:07,159 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1511 transitions. Word has length 158 [2021-10-28 09:11:07,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:07,159 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1511 transitions. [2021-10-28 09:11:07,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 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) [2021-10-28 09:11:07,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1511 transitions. [2021-10-28 09:11:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-28 09:11:07,162 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:07,162 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:07,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:07,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:07,379 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:11:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:07,380 INFO L85 PathProgramCache]: Analyzing trace with hash 7398519, now seen corresponding path program 23 times [2021-10-28 09:11:07,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:07,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599245842] [2021-10-28 09:11:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:07,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:11:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:11:08,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:08,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599245842] [2021-10-28 09:11:08,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599245842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:08,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069396293] [2021-10-28 09:11:08,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:11:08,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:08,369 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:08,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-28 09:11:11,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-28 09:11:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:11,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 139 conjunts are in the unsatisfiable core [2021-10-28 09:11:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:11,209 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:11:11,209 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 [2021-10-28 09:11:12,877 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 [2021-10-28 09:11:12,967 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 09:11:12,967 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 34 treesize of output 33 [2021-10-28 09:11:16,150 INFO L354 Elim1Store]: treesize reduction 47, result has 17.5 percent of original size [2021-10-28 09:11:16,150 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 39 treesize of output 25 [2021-10-28 09:11:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 242 proven. 586 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:11:16,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069396293] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:16,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:16,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2021-10-28 09:11:16,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24288695] [2021-10-28 09:11:16,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-28 09:11:16,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-28 09:11:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4731, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 09:11:16,625 INFO L87 Difference]: Start difference. First operand 1365 states and 1511 transitions. Second operand has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 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) [2021-10-28 09:11:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:28,083 INFO L93 Difference]: Finished difference Result 2757 states and 3025 transitions. [2021-10-28 09:11:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-10-28 09:11:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 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 166 [2021-10-28 09:11:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:28,089 INFO L225 Difference]: With dead ends: 2757 [2021-10-28 09:11:28,089 INFO L226 Difference]: Without dead ends: 1492 [2021-10-28 09:11:28,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6587 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1216, Invalid=27176, Unknown=0, NotChecked=0, Total=28392 [2021-10-28 09:11:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-10-28 09:11:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1385. [2021-10-28 09:11:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1374 states have (on average 1.1069868995633187) internal successors, (1521), 1374 states have internal predecessors, (1521), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:11:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1531 transitions. [2021-10-28 09:11:28,103 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1531 transitions. Word has length 166 [2021-10-28 09:11:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:28,103 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 1531 transitions. [2021-10-28 09:11:28,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 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) [2021-10-28 09:11:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1531 transitions. [2021-10-28 09:11:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-28 09:11:28,106 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:11:28,106 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:28,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:28,323 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-28 09:11:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:11:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -528625514, now seen corresponding path program 3 times [2021-10-28 09:11:28,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:11:28,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890132507] [2021-10-28 09:11:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:11:28,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:11:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:29,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:11:29,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:11:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 242 proven. 635 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:11:29,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:11:29,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890132507] [2021-10-28 09:11:29,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890132507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:29,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127886492] [2021-10-28 09:11:29,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:11:29,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:11:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:11:29,104 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:11:29,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 09:11:32,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-10-28 09:11:32,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:11:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 09:11:32,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:11:32,389 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:11:32,389 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 [2021-10-28 09:11:32,398 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 [2021-10-28 09:11:33,127 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 23 treesize of output 19 [2021-10-28 09:11:33,191 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 09:11:33,191 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 39 treesize of output 38 [2021-10-28 09:11:35,144 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-10-28 09:11:35,144 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 44 treesize of output 32 [2021-10-28 09:11:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 11 proven. 90 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-10-28 09:11:35,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127886492] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:11:35,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:11:35,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 42 [2021-10-28 09:11:35,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033054410] [2021-10-28 09:11:35,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 09:11:35,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:11:35,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 09:11:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:11:35,348 INFO L87 Difference]: Start difference. First operand 1385 states and 1531 transitions. Second operand has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 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) [2021-10-28 09:11:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:11:41,821 INFO L93 Difference]: Finished difference Result 1486 states and 1627 transitions. [2021-10-28 09:11:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-28 09:11:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 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 170 [2021-10-28 09:11:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:11:41,822 INFO L225 Difference]: With dead ends: 1486 [2021-10-28 09:11:41,823 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:11:41,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=774, Invalid=6882, Unknown=0, NotChecked=0, Total=7656 [2021-10-28 09:11:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:11:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:11:41,824 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) [2021-10-28 09:11:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:11:41,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-10-28 09:11:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:11:41,824 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:11:41,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 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) [2021-10-28 09:11:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:11:41,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:11:41,827 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr0REQUIRES_VIOLATION [2021-10-28 09:11:41,828 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr1REQUIRES_VIOLATION [2021-10-28 09:11:41,828 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr2REQUIRES_VIOLATION [2021-10-28 09:11:41,828 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr3REQUIRES_VIOLATION [2021-10-28 09:11:41,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:11:41,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:11:41,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:11:41,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:11:41,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:11:41,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:11:41,830 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:11:41,830 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:11:41,830 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:11:41,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 09:11:42,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-28 09:11:42,054 INFO L731 BasicCegarLoop]: Path program histogram: [23, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:11:42,056 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:11:42,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:11:42 BoogieIcfgContainer [2021-10-28 09:11:42,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:11:42,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:11:42,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:11:42,059 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:11:42,068 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:35" (3/4) ... [2021-10-28 09:11:42,080 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:11:42,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:11:42,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2021-10-28 09:11:42,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 09:11:42,087 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 09:11:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 09:11:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 09:11:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:11:42,088 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 09:11:42,095 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-28 09:11:42,095 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 09:11:42,096 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 09:11:42,096 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:11:42,143 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:11:42,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:11:42,145 INFO L168 Benchmark]: Toolchain (without parser) took 307901.07 ms. Allocated memory was 119.5 MB in the beginning and 824.2 MB in the end (delta: 704.6 MB). Free memory was 82.9 MB in the beginning and 185.9 MB in the end (delta: -103.0 MB). Peak memory consumption was 600.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:11:42,145 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:11:42,145 INFO L168 Benchmark]: CACSL2BoogieTranslator took 431.80 ms. Allocated memory is still 119.5 MB. Free memory was 82.7 MB in the beginning and 89.3 MB in the end (delta: -6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:11:42,146 INFO L168 Benchmark]: Boogie Preprocessor took 97.12 ms. Allocated memory is still 119.5 MB. Free memory was 89.3 MB in the beginning and 87.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:11:42,146 INFO L168 Benchmark]: RCFGBuilder took 607.02 ms. Allocated memory is still 119.5 MB. Free memory was 86.7 MB in the beginning and 66.9 MB in the end (delta: 19.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:11:42,147 INFO L168 Benchmark]: TraceAbstraction took 306669.28 ms. Allocated memory was 119.5 MB in the beginning and 824.2 MB in the end (delta: 704.6 MB). Free memory was 66.9 MB in the beginning and 189.0 MB in the end (delta: -122.1 MB). Peak memory consumption was 584.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:11:42,147 INFO L168 Benchmark]: Witness Printer took 85.16 ms. Allocated memory is still 824.2 MB. Free memory was 189.0 MB in the beginning and 185.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:11:42,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 56.7 MB in the beginning and 56.7 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 431.80 ms. Allocated memory is still 119.5 MB. Free memory was 82.7 MB in the beginning and 89.3 MB in the end (delta: -6.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 97.12 ms. Allocated memory is still 119.5 MB. Free memory was 89.3 MB in the beginning and 87.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 607.02 ms. Allocated memory is still 119.5 MB. Free memory was 86.7 MB in the beginning and 66.9 MB in the end (delta: 19.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 306669.28 ms. Allocated memory was 119.5 MB in the beginning and 824.2 MB in the end (delta: 704.6 MB). Free memory was 66.9 MB in the beginning and 189.0 MB in the end (delta: -122.1 MB). Peak memory consumption was 584.1 MB. Max. memory is 16.1 GB. * Witness Printer took 85.16 ms. Allocated memory is still 824.2 MB. Free memory was 189.0 MB in the beginning and 185.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: 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: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: 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: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 67 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 306.6s, OverallIterations: 53, TraceHistogramMax: 13, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 179.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2646 SDtfs, 9471 SDslu, 13748 SDs, 0 SdLazy, 84630 SolverSat, 1520 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 40.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5051 GetRequests, 2704 SyntacticMatches, 25 SemanticMatches, 2322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40410 ImplicationChecksByTransitivity, 159.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1385occurred in iteration=52, InterpolantAutomatonStates: 1345, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 53 MinimizatonAttempts, 1118 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 74.0s InterpolantComputationTime, 6644 NumberOfCodeBlocks, 6596 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 6550 ConstructedInterpolants, 755 QuantifiedInterpolants, 84091 SizeOfPredicates, 733 NumberOfNonLiveVariables, 13656 ConjunctsInSsa, 2526 ConjunctsInUnsatCore, 94 InterpolantComputations, 14 PerfectInterpolantSequences, 4320/16412 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:11:42,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d207eaf-ae0c-4698-93bc-2a93efb98cc3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...