./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0504.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0504.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX --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 cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:32:36,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:32:36,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:32:36,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:32:36,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:32:36,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:32:36,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:32:36,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:32:36,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:32:36,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:32:36,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:32:36,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:32:36,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:32:36,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:32:36,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:32:36,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:32:36,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:32:36,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:32:36,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:32:36,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:32:36,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:32:36,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:32:36,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:32:36,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:32:36,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:32:36,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:32:36,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:32:36,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:32:36,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:32:36,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:32:36,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:32:36,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:32:36,614 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:32:36,615 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:32:36,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:32:36,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:32:36,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:32:36,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:32:36,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:32:36,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:32:36,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:32:36,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:32:36,672 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:32:36,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:32:36,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:32:36,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:32:36,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:32:36,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:32:36,683 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:32:36,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:32:36,684 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:32:36,684 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:32:36,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:32:36,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:32:36,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:32:36,685 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:32:36,686 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:32:36,686 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:32:36,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:32:36,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:32:36,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:32:36,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:32:36,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:32:36,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:32:36,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:32:36,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:36,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:32:36,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:32:36,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:32:36,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:32:36,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:32:36,689 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_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cddde357ab55a506b6049f3b60959cd723bf2cbfd36f7774fe3606d53024bbf3 [2021-11-09 09:32:37,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:32:37,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:32:37,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:32:37,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:32:37,065 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:32:37,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety/test-0504.i [2021-11-09 09:32:37,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/data/428bd6c7a/234ff22fac8247cabeb875141f930939/FLAG726bea66a [2021-11-09 09:32:37,829 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:32:37,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/sv-benchmarks/c/memsafety/test-0504.i [2021-11-09 09:32:37,846 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/data/428bd6c7a/234ff22fac8247cabeb875141f930939/FLAG726bea66a [2021-11-09 09:32:38,047 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/data/428bd6c7a/234ff22fac8247cabeb875141f930939 [2021-11-09 09:32:38,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:32:38,052 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:32:38,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:38,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:32:38,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:32:38,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234a3c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38, skipping insertion in model container [2021-11-09 09:32:38,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:32:38,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:32:38,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:38,666 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:32:38,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:38,771 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:32:38,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38 WrapperNode [2021-11-09 09:32:38,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:38,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:32:38,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:32:38,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:32:38,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,884 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:32:38,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:32:38,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:32:38,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:32:38,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (1/1) ... [2021-11-09 09:32:38,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:38,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:38,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:32:38,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:32:39,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:32:39,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:32:39,005 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 09:32:39,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 09:32:39,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 09:32:39,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 09:32:39,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 09:32:39,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 09:32:39,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:32:39,007 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 09:32:39,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 09:32:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 09:32:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 09:32:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 09:32:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:32:39,009 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 09:32:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 09:32:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 09:32:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 09:32:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 09:32:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 09:32:39,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 09:32:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 09:32:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 09:32:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 09:32:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 09:32:39,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 09:32:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 09:32:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 09:32:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 09:32:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 09:32:39,012 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 09:32:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 09:32:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 09:32:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 09:32:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 09:32:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 09:32:39,013 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 09:32:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 09:32:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 09:32:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 09:32:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 09:32:39,014 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 09:32:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 09:32:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 09:32:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 09:32:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 09:32:39,015 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 09:32:39,016 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 09:32:39,016 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 09:32:39,016 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 09:32:39,017 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 09:32:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 09:32:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 09:32:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 09:32:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 09:32:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 09:32:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 09:32:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 09:32:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 09:32:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 09:32:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 09:32:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 09:32:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 09:32:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 09:32:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 09:32:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 09:32:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 09:32:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 09:32:39,023 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 09:32:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:32:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 09:32:39,024 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 09:32:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:32:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 09:32:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 09:32:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 09:32:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 09:32:39,025 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 09:32:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 09:32:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 09:32:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 09:32:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 09:32:39,026 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 09:32:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 09:32:39,027 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 09:32:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 09:32:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 09:32:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 09:32:39,028 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 09:32:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 09:32:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 09:32:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 09:32:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 09:32:39,029 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 09:32:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 09:32:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 09:32:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 09:32:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 09:32:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 09:32:39,030 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 09:32:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 09:32:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 09:32:39,031 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 09:32:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 09:32:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 09:32:39,032 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 09:32:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 09:32:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 09:32:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 09:32:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 09:32:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 09:32:39,033 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 09:32:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 09:32:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 09:32:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 09:32:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 09:32:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 09:32:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 09:32:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 09:32:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 09:32:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 09:32:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:32:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:32:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:32:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:32:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:32:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:32:39,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:32:39,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:32:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:32:39,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:32:39,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:32:39,852 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 09:32:39,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:39 BoogieIcfgContainer [2021-11-09 09:32:39,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:32:39,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:32:39,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:32:39,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:32:39,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:32:38" (1/3) ... [2021-11-09 09:32:39,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a144d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:39, skipping insertion in model container [2021-11-09 09:32:39,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:38" (2/3) ... [2021-11-09 09:32:39,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a144d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:39, skipping insertion in model container [2021-11-09 09:32:39,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:39" (3/3) ... [2021-11-09 09:32:39,876 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0504.i [2021-11-09 09:32:39,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:32:39,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-09 09:32:39,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:32:39,947 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-09 09:32:39,948 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-09 09:32:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 46 states have (on average 2.130434782608696) internal successors, (98), 87 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:32:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 09:32:39,975 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:39,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:39,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:39,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1038244033, now seen corresponding path program 1 times [2021-11-09 09:32:39,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:39,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317614198] [2021-11-09 09:32:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:39,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:40,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:40,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317614198] [2021-11-09 09:32:40,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317614198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:40,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:40,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:32:40,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485015921] [2021-11-09 09:32:40,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:32:40,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:32:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:32:40,349 INFO L87 Difference]: Start difference. First operand has 92 states, 46 states have (on average 2.130434782608696) internal successors, (98), 87 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:40,678 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2021-11-09 09:32:40,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:32:40,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2021-11-09 09:32:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:40,694 INFO L225 Difference]: With dead ends: 123 [2021-11-09 09:32:40,694 INFO L226 Difference]: Without dead ends: 117 [2021-11-09 09:32:40,698 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:32:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-09 09:32:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 92. [2021-11-09 09:32:40,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 88 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-11-09 09:32:40,770 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 9 [2021-11-09 09:32:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:40,771 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-11-09 09:32:40,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-11-09 09:32:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:32:40,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:40,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:40,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:32:40,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2118174319, now seen corresponding path program 1 times [2021-11-09 09:32:40,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:40,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118063421] [2021-11-09 09:32:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:40,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:40,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:40,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:40,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118063421] [2021-11-09 09:32:40,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118063421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:40,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:40,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:40,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766674661] [2021-11-09 09:32:40,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:40,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:40,899 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:41,138 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-11-09 09:32:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:32:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-11-09 09:32:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:41,142 INFO L225 Difference]: With dead ends: 137 [2021-11-09 09:32:41,142 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 09:32:41,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 09:32:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-11-09 09:32:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 68 states have (on average 2.0294117647058822) internal successors, (138), 108 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 141 transitions. [2021-11-09 09:32:41,157 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 141 transitions. Word has length 10 [2021-11-09 09:32:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:41,158 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 141 transitions. [2021-11-09 09:32:41,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 141 transitions. [2021-11-09 09:32:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:32:41,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:41,160 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:41,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:32:41,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2118173554, now seen corresponding path program 1 times [2021-11-09 09:32:41,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:41,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752160580] [2021-11-09 09:32:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:41,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:41,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752160580] [2021-11-09 09:32:41,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752160580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:41,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:41,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:32:41,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607946574] [2021-11-09 09:32:41,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:41,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:41,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:41,254 INFO L87 Difference]: Start difference. First operand 112 states and 141 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:41,464 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2021-11-09 09:32:41,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:41,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-11-09 09:32:41,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:41,477 INFO L225 Difference]: With dead ends: 133 [2021-11-09 09:32:41,477 INFO L226 Difference]: Without dead ends: 133 [2021-11-09 09:32:41,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-09 09:32:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 104. [2021-11-09 09:32:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 100 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2021-11-09 09:32:41,499 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 10 [2021-11-09 09:32:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:41,500 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2021-11-09 09:32:41,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,500 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2021-11-09 09:32:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:32:41,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:41,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:41,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:32:41,502 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2118173555, now seen corresponding path program 1 times [2021-11-09 09:32:41,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:41,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54092349] [2021-11-09 09:32:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:41,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:41,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54092349] [2021-11-09 09:32:41,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54092349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:41,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:41,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:32:41,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759339509] [2021-11-09 09:32:41,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:41,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:41,684 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:41,904 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2021-11-09 09:32:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-11-09 09:32:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:41,908 INFO L225 Difference]: With dead ends: 141 [2021-11-09 09:32:41,909 INFO L226 Difference]: Without dead ends: 141 [2021-11-09 09:32:41,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-09 09:32:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 104. [2021-11-09 09:32:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.6712328767123288) internal successors, (122), 100 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2021-11-09 09:32:41,934 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 10 [2021-11-09 09:32:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:41,934 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2021-11-09 09:32:41,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2021-11-09 09:32:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:32:41,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:41,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:41,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:32:41,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -960435103, now seen corresponding path program 1 times [2021-11-09 09:32:41,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:41,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188941197] [2021-11-09 09:32:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:41,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:42,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:42,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188941197] [2021-11-09 09:32:42,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188941197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:42,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:42,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:42,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924294118] [2021-11-09 09:32:42,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:42,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:42,234 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:42,475 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2021-11-09 09:32:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:42,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2021-11-09 09:32:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:42,480 INFO L225 Difference]: With dead ends: 130 [2021-11-09 09:32:42,480 INFO L226 Difference]: Without dead ends: 130 [2021-11-09 09:32:42,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-09 09:32:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 96. [2021-11-09 09:32:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.588235294117647) internal successors, (108), 92 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-11-09 09:32:42,491 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 19 [2021-11-09 09:32:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:42,492 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-11-09 09:32:42,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-11-09 09:32:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:32:42,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:42,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:42,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:32:42,494 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:42,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash 291282885, now seen corresponding path program 1 times [2021-11-09 09:32:42,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:42,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899525663] [2021-11-09 09:32:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:42,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:42,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:42,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899525663] [2021-11-09 09:32:42,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899525663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:42,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:42,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:32:42,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283617424] [2021-11-09 09:32:42,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:42,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:42,632 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:42,786 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2021-11-09 09:32:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:42,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-09 09:32:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:42,788 INFO L225 Difference]: With dead ends: 92 [2021-11-09 09:32:42,788 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 09:32:42,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 09:32:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-09 09:32:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 88 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2021-11-09 09:32:42,795 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 20 [2021-11-09 09:32:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:42,795 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2021-11-09 09:32:42,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2021-11-09 09:32:42,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:32:42,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:42,797 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:42,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:32:42,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:42,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:42,798 INFO L85 PathProgramCache]: Analyzing trace with hash 291282886, now seen corresponding path program 1 times [2021-11-09 09:32:42,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:42,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811873567] [2021-11-09 09:32:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:42,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:42,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:42,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811873567] [2021-11-09 09:32:42,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811873567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:42,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:42,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:32:42,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757917515] [2021-11-09 09:32:42,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:42,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:42,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:42,928 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:43,074 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-11-09 09:32:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-09 09:32:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:43,081 INFO L225 Difference]: With dead ends: 88 [2021-11-09 09:32:43,081 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 09:32:43,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 09:32:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-09 09:32:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 84 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2021-11-09 09:32:43,103 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 20 [2021-11-09 09:32:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:43,103 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2021-11-09 09:32:43,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2021-11-09 09:32:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:32:43,105 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:43,105 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] [2021-11-09 09:32:43,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:32:43,106 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:43,107 INFO L85 PathProgramCache]: Analyzing trace with hash 719998695, now seen corresponding path program 1 times [2021-11-09 09:32:43,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:43,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304746743] [2021-11-09 09:32:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:43,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:43,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:43,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304746743] [2021-11-09 09:32:43,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304746743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:43,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:43,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:43,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680076574] [2021-11-09 09:32:43,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:43,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:43,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:43,218 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:43,446 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2021-11-09 09:32:43,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:43,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:32:43,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:43,448 INFO L225 Difference]: With dead ends: 118 [2021-11-09 09:32:43,448 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 09:32:43,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 09:32:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-11-09 09:32:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 86 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-11-09 09:32:43,454 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 22 [2021-11-09 09:32:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:43,454 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-11-09 09:32:43,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-11-09 09:32:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:32:43,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:43,457 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] [2021-11-09 09:32:43,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 09:32:43,458 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:43,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash 719998696, now seen corresponding path program 1 times [2021-11-09 09:32:43,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:43,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159064983] [2021-11-09 09:32:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:43,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:43,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:43,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159064983] [2021-11-09 09:32:43,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159064983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:43,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:43,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:43,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061871197] [2021-11-09 09:32:43,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:43,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:43,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:43,588 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:43,801 INFO L93 Difference]: Finished difference Result 157 states and 176 transitions. [2021-11-09 09:32:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:32:43,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:32:43,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:43,803 INFO L225 Difference]: With dead ends: 157 [2021-11-09 09:32:43,803 INFO L226 Difference]: Without dead ends: 157 [2021-11-09 09:32:43,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-09 09:32:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-11-09 09:32:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 109 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2021-11-09 09:32:43,809 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 22 [2021-11-09 09:32:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:43,810 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2021-11-09 09:32:43,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2021-11-09 09:32:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:32:43,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:43,812 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] [2021-11-09 09:32:43,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 09:32:43,812 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash 845122477, now seen corresponding path program 1 times [2021-11-09 09:32:43,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:43,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921554304] [2021-11-09 09:32:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:43,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:43,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:43,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921554304] [2021-11-09 09:32:43,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921554304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:43,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:43,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:43,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461528270] [2021-11-09 09:32:43,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:43,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:43,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:43,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:43,889 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:44,048 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-11-09 09:32:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:32:44,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-09 09:32:44,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:44,050 INFO L225 Difference]: With dead ends: 117 [2021-11-09 09:32:44,050 INFO L226 Difference]: Without dead ends: 117 [2021-11-09 09:32:44,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-09 09:32:44,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2021-11-09 09:32:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 106 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2021-11-09 09:32:44,055 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 23 [2021-11-09 09:32:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:44,055 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2021-11-09 09:32:44,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2021-11-09 09:32:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:32:44,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:44,056 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:44,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 09:32:44,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1774528870, now seen corresponding path program 1 times [2021-11-09 09:32:44,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:44,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846584292] [2021-11-09 09:32:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:44,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:44,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:44,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846584292] [2021-11-09 09:32:44,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846584292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:44,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:44,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:32:44,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690844484] [2021-11-09 09:32:44,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:44,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:44,161 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:44,404 INFO L93 Difference]: Finished difference Result 174 states and 191 transitions. [2021-11-09 09:32:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:32:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-09 09:32:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:44,406 INFO L225 Difference]: With dead ends: 174 [2021-11-09 09:32:44,406 INFO L226 Difference]: Without dead ends: 174 [2021-11-09 09:32:44,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-09 09:32:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-11-09 09:32:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.3076923076923077) internal successors, (136), 120 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2021-11-09 09:32:44,413 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 23 [2021-11-09 09:32:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:44,413 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2021-11-09 09:32:44,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2021-11-09 09:32:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:32:44,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:44,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:32:44,415 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1774528871, now seen corresponding path program 1 times [2021-11-09 09:32:44,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:44,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88185324] [2021-11-09 09:32:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:44,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:44,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:44,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88185324] [2021-11-09 09:32:44,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88185324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:44,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:44,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 09:32:44,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533593581] [2021-11-09 09:32:44,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:32:44,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:44,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:32:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:32:44,698 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:45,411 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2021-11-09 09:32:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:32:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-09 09:32:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:45,414 INFO L225 Difference]: With dead ends: 188 [2021-11-09 09:32:45,414 INFO L226 Difference]: Without dead ends: 188 [2021-11-09 09:32:45,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:32:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-09 09:32:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-11-09 09:32:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 104 states have (on average 1.2884615384615385) internal successors, (134), 120 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2021-11-09 09:32:45,422 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 23 [2021-11-09 09:32:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:45,422 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2021-11-09 09:32:45,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2021-11-09 09:32:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:32:45,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:45,424 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:45,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 09:32:45,425 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash 429014056, now seen corresponding path program 1 times [2021-11-09 09:32:45,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:45,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684189551] [2021-11-09 09:32:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:45,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:45,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:45,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684189551] [2021-11-09 09:32:45,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684189551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:45,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:45,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:45,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974460298] [2021-11-09 09:32:45,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:45,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:45,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:45,518 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:45,817 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2021-11-09 09:32:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:32:45,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-09 09:32:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:45,820 INFO L225 Difference]: With dead ends: 163 [2021-11-09 09:32:45,820 INFO L226 Difference]: Without dead ends: 163 [2021-11-09 09:32:45,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-09 09:32:45,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 130. [2021-11-09 09:32:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 110 states have (on average 1.309090909090909) internal successors, (144), 126 states have internal predecessors, (144), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 147 transitions. [2021-11-09 09:32:45,827 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 147 transitions. Word has length 24 [2021-11-09 09:32:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:45,827 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 147 transitions. [2021-11-09 09:32:45,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 147 transitions. [2021-11-09 09:32:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:32:45,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:45,829 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:45,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 09:32:45,830 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash 429014057, now seen corresponding path program 1 times [2021-11-09 09:32:45,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:45,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805473560] [2021-11-09 09:32:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:45,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:45,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:45,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805473560] [2021-11-09 09:32:45,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805473560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:45,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:45,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:45,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506748474] [2021-11-09 09:32:45,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:45,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:45,935 INFO L87 Difference]: Start difference. First operand 130 states and 147 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:46,230 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2021-11-09 09:32:46,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:32:46,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-09 09:32:46,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:46,232 INFO L225 Difference]: With dead ends: 204 [2021-11-09 09:32:46,233 INFO L226 Difference]: Without dead ends: 204 [2021-11-09 09:32:46,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-09 09:32:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 142. [2021-11-09 09:32:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 122 states have (on average 1.3360655737704918) internal successors, (163), 138 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 166 transitions. [2021-11-09 09:32:46,239 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 166 transitions. Word has length 24 [2021-11-09 09:32:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:46,240 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 166 transitions. [2021-11-09 09:32:46,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:46,241 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 166 transitions. [2021-11-09 09:32:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:32:46,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:46,242 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] [2021-11-09 09:32:46,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 09:32:46,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:46,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1064838955, now seen corresponding path program 1 times [2021-11-09 09:32:46,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:46,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706630105] [2021-11-09 09:32:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:46,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:46,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:46,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706630105] [2021-11-09 09:32:46,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706630105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:46,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:46,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:32:46,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713985504] [2021-11-09 09:32:46,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:32:46,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:32:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:32:46,425 INFO L87 Difference]: Start difference. First operand 142 states and 166 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:46,787 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2021-11-09 09:32:46,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:32:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 27 [2021-11-09 09:32:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:46,790 INFO L225 Difference]: With dead ends: 205 [2021-11-09 09:32:46,790 INFO L226 Difference]: Without dead ends: 205 [2021-11-09 09:32:46,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:32:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-09 09:32:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2021-11-09 09:32:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 130 states have (on average 1.323076923076923) internal successors, (172), 146 states have internal predecessors, (172), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2021-11-09 09:32:46,801 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 27 [2021-11-09 09:32:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:46,801 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2021-11-09 09:32:46,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2021-11-09 09:32:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:32:46,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:46,803 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] [2021-11-09 09:32:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 09:32:46,804 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr38ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1349729391, now seen corresponding path program 1 times [2021-11-09 09:32:46,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:46,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225646351] [2021-11-09 09:32:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:46,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:46,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:46,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225646351] [2021-11-09 09:32:46,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225646351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:46,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:46,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:46,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817703111] [2021-11-09 09:32:46,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:32:46,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:46,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:32:46,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:32:46,908 INFO L87 Difference]: Start difference. First operand 150 states and 175 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:47,189 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2021-11-09 09:32:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:32:47,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 28 [2021-11-09 09:32:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:47,192 INFO L225 Difference]: With dead ends: 172 [2021-11-09 09:32:47,192 INFO L226 Difference]: Without dead ends: 172 [2021-11-09 09:32:47,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:47,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-09 09:32:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 162. [2021-11-09 09:32:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 142 states have (on average 1.3591549295774648) internal successors, (193), 158 states have internal predecessors, (193), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2021-11-09 09:32:47,200 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 28 [2021-11-09 09:32:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:47,202 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2021-11-09 09:32:47,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2021-11-09 09:32:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:32:47,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:47,205 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:47,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 09:32:47,206 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash 304639720, now seen corresponding path program 1 times [2021-11-09 09:32:47,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:47,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656447928] [2021-11-09 09:32:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:47,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:47,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:47,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656447928] [2021-11-09 09:32:47,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656447928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:47,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068400470] [2021-11-09 09:32:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:47,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:47,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:47,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:32:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:32:47,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:47,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:32:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:32:47,783 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:32:47,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-09 09:32:47,804 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:32:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-09 09:32:47,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:32:47,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:32:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:32:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:47,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:32:48,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:32:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:32:48,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:32:48,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 09:32:48,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:48,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 09:32:48,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:32:48,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 51 [2021-11-09 09:32:48,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:32:48,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 19 [2021-11-09 09:32:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:48,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068400470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:48,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:48,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-11-09 09:32:48,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807531318] [2021-11-09 09:32:48,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 09:32:48,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:48,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 09:32:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:32:48,651 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:49,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:49,511 INFO L93 Difference]: Finished difference Result 191 states and 223 transitions. [2021-11-09 09:32:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:32:49,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 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 31 [2021-11-09 09:32:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:49,514 INFO L225 Difference]: With dead ends: 191 [2021-11-09 09:32:49,514 INFO L226 Difference]: Without dead ends: 191 [2021-11-09 09:32:49,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:32:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-09 09:32:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 166. [2021-11-09 09:32:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 146 states have (on average 1.3493150684931507) internal successors, (197), 162 states have internal predecessors, (197), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2021-11-09 09:32:49,523 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 31 [2021-11-09 09:32:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:49,524 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2021-11-09 09:32:49,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2021-11-09 09:32:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:32:49,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:49,525 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:49,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:49,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:32:49,746 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:49,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash -826447995, now seen corresponding path program 1 times [2021-11-09 09:32:49,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:49,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281329511] [2021-11-09 09:32:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:49,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:49,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:49,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281329511] [2021-11-09 09:32:49,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281329511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:49,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373837639] [2021-11-09 09:32:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:49,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:49,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:49,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:49,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:32:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:32:50,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:32:50,175 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:32:50,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:32:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:50,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373837639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:50,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:50,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-09 09:32:50,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105707738] [2021-11-09 09:32:50,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:32:50,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:50,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:32:50,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:50,521 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:50,888 INFO L93 Difference]: Finished difference Result 210 states and 245 transitions. [2021-11-09 09:32:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 31 [2021-11-09 09:32:50,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:50,891 INFO L225 Difference]: With dead ends: 210 [2021-11-09 09:32:50,891 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 09:32:50,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:32:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 09:32:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-11-09 09:32:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 146 states have (on average 1.3356164383561644) internal successors, (195), 161 states have internal predecessors, (195), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 198 transitions. [2021-11-09 09:32:50,899 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 198 transitions. Word has length 31 [2021-11-09 09:32:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:50,899 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 198 transitions. [2021-11-09 09:32:50,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 198 transitions. [2021-11-09 09:32:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:32:50,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:50,901 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:50,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:51,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:32:51,101 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash -826447994, now seen corresponding path program 1 times [2021-11-09 09:32:51,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:51,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427247288] [2021-11-09 09:32:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:51,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:51,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:51,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427247288] [2021-11-09 09:32:51,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427247288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:51,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148169448] [2021-11-09 09:32:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:51,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:51,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:51,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:51,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:32:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:51,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:32:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:51,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:32:51,837 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:32:51,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 26 [2021-11-09 09:32:51,851 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:32:51,852 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 23 treesize of output 23 [2021-11-09 09:32:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:52,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148169448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:52,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:52,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-11-09 09:32:52,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314469304] [2021-11-09 09:32:52,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:32:52,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:32:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:32:52,181 INFO L87 Difference]: Start difference. First operand 165 states and 198 transitions. Second operand has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:52,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:52,775 INFO L93 Difference]: Finished difference Result 254 states and 299 transitions. [2021-11-09 09:32:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:32:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-09 09:32:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:52,778 INFO L225 Difference]: With dead ends: 254 [2021-11-09 09:32:52,778 INFO L226 Difference]: Without dead ends: 254 [2021-11-09 09:32:52,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:32:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-09 09:32:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 164. [2021-11-09 09:32:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 146 states have (on average 1.321917808219178) internal successors, (193), 160 states have internal predecessors, (193), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 196 transitions. [2021-11-09 09:32:52,786 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 196 transitions. Word has length 31 [2021-11-09 09:32:52,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:52,787 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 196 transitions. [2021-11-09 09:32:52,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 196 transitions. [2021-11-09 09:32:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-09 09:32:52,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:52,788 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] [2021-11-09 09:32:52,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:53,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:53,016 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash 853896140, now seen corresponding path program 1 times [2021-11-09 09:32:53,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:53,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862059545] [2021-11-09 09:32:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:53,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:53,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:53,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:53,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862059545] [2021-11-09 09:32:53,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862059545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:53,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715686538] [2021-11-09 09:32:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:53,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:53,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:53,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:32:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:32:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:53,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715686538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:53,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:53,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 09:32:53,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786815911] [2021-11-09 09:32:53,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:32:53,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:32:53,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:32:53,748 INFO L87 Difference]: Start difference. First operand 164 states and 196 transitions. Second operand has 11 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:54,153 INFO L93 Difference]: Finished difference Result 166 states and 197 transitions. [2021-11-09 09:32:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:32:54,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-09 09:32:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:54,155 INFO L225 Difference]: With dead ends: 166 [2021-11-09 09:32:54,155 INFO L226 Difference]: Without dead ends: 154 [2021-11-09 09:32:54,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:32:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-09 09:32:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-11-09 09:32:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 136 states have (on average 1.338235294117647) internal successors, (182), 150 states have internal predecessors, (182), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-11-09 09:32:54,162 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 32 [2021-11-09 09:32:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:54,162 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-11-09 09:32:54,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-11-09 09:32:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:32:54,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:54,164 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:54,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:54,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-09 09:32:54,364 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash 253525618, now seen corresponding path program 1 times [2021-11-09 09:32:54,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:54,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056178471] [2021-11-09 09:32:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:54,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:54,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:54,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056178471] [2021-11-09 09:32:54,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056178471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:54,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718556760] [2021-11-09 09:32:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:54,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:54,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:54,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:54,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:32:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:32:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:54,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:32:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:32:54,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:54,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:32:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:55,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:32:55,125 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-09 09:32:55,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 20 [2021-11-09 09:32:55,161 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:32:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:32:55,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:55,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:55,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-09 09:32:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:55,426 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-09 09:32:55,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 15 [2021-11-09 09:32:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718556760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:55,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:55,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2021-11-09 09:32:55,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335155140] [2021-11-09 09:32:55,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:32:55,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:32:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:32:55,659 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:56,583 INFO L93 Difference]: Finished difference Result 265 states and 314 transitions. [2021-11-09 09:32:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:32:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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 35 [2021-11-09 09:32:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:56,586 INFO L225 Difference]: With dead ends: 265 [2021-11-09 09:32:56,587 INFO L226 Difference]: Without dead ends: 265 [2021-11-09 09:32:56,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:32:56,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-09 09:32:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 171. [2021-11-09 09:32:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 153 states have (on average 1.3137254901960784) internal successors, (201), 167 states have internal predecessors, (201), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 204 transitions. [2021-11-09 09:32:56,596 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 204 transitions. Word has length 35 [2021-11-09 09:32:56,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:56,596 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 204 transitions. [2021-11-09 09:32:56,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 204 transitions. [2021-11-09 09:32:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:32:56,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:56,598 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:32:56,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:56,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 09:32:56,808 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:56,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash 198765340, now seen corresponding path program 1 times [2021-11-09 09:32:56,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:56,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134250824] [2021-11-09 09:32:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:56,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:57,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:57,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134250824] [2021-11-09 09:32:57,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134250824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:57,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072592531] [2021-11-09 09:32:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:57,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:57,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:57,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:32:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:57,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:32:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:32:57,459 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 17 treesize of output 13 [2021-11-09 09:32:57,498 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:32:57,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-09 09:32:57,594 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:32:57,595 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 24 [2021-11-09 09:32:57,681 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 30 treesize of output 18 [2021-11-09 09:32:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:57,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072592531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:57,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:57,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-09 09:32:57,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737325157] [2021-11-09 09:32:57,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:32:57,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:32:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:32:57,717 INFO L87 Difference]: Start difference. First operand 171 states and 204 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:58,111 INFO L93 Difference]: Finished difference Result 189 states and 223 transitions. [2021-11-09 09:32:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:32:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 36 [2021-11-09 09:32:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:58,116 INFO L225 Difference]: With dead ends: 189 [2021-11-09 09:32:58,116 INFO L226 Difference]: Without dead ends: 189 [2021-11-09 09:32:58,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:32:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-09 09:32:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2021-11-09 09:32:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 153 states have (on average 1.3006535947712419) internal successors, (199), 166 states have internal predecessors, (199), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 202 transitions. [2021-11-09 09:32:58,123 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 202 transitions. Word has length 36 [2021-11-09 09:32:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:58,123 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 202 transitions. [2021-11-09 09:32:58,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:32:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 202 transitions. [2021-11-09 09:32:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 09:32:58,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:58,125 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-09 09:32:58,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:58,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:58,338 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:32:58,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:58,338 INFO L85 PathProgramCache]: Analyzing trace with hash 198765341, now seen corresponding path program 1 times [2021-11-09 09:32:58,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:58,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723772790] [2021-11-09 09:32:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:58,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:32:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:58,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:58,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723772790] [2021-11-09 09:32:58,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723772790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:58,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099422844] [2021-11-09 09:32:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:58,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:58,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:58,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:32:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:32:58,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:58,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:32:59,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-09 09:32:59,131 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 35 treesize of output 31 [2021-11-09 09:32:59,233 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-09 09:32:59,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 32 [2021-11-09 09:32:59,267 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:32:59,268 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 15 treesize of output 15 [2021-11-09 09:32:59,419 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:32:59,419 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 61 treesize of output 52 [2021-11-09 09:32:59,438 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 09:32:59,439 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 57 treesize of output 48 [2021-11-09 09:32:59,566 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:32:59,567 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 72 treesize of output 52 [2021-11-09 09:32:59,575 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:32:59,575 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 46 treesize of output 26 [2021-11-09 09:32:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:59,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099422844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:32:59,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:32:59,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-09 09:32:59,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363319391] [2021-11-09 09:32:59,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:32:59,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:59,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:32:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:32:59,618 INFO L87 Difference]: Start difference. First operand 170 states and 202 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:00,716 INFO L93 Difference]: Finished difference Result 245 states and 289 transitions. [2021-11-09 09:33:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:33:00,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 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 36 [2021-11-09 09:33:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:00,718 INFO L225 Difference]: With dead ends: 245 [2021-11-09 09:33:00,719 INFO L226 Difference]: Without dead ends: 245 [2021-11-09 09:33:00,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:33:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-09 09:33:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2021-11-09 09:33:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 139 states have (on average 1.3093525179856116) internal successors, (182), 151 states have internal predecessors, (182), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2021-11-09 09:33:00,727 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 36 [2021-11-09 09:33:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:00,727 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2021-11-09 09:33:00,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:00,728 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2021-11-09 09:33:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 09:33:00,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:00,729 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:00,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:00,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:33:00,952 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1175015117, now seen corresponding path program 1 times [2021-11-09 09:33:00,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:00,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114078747] [2021-11-09 09:33:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:00,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:01,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:01,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114078747] [2021-11-09 09:33:01,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114078747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:01,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893037040] [2021-11-09 09:33:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:01,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:01,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:01,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:01,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:33:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:01,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:33:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:33:01,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893037040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:01,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:01,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-11-09 09:33:01,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037034267] [2021-11-09 09:33:01,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:33:01,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:01,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:33:01,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:33:01,707 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2021-11-09 09:33:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:01,883 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2021-11-09 09:33:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:33:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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 37 [2021-11-09 09:33:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:01,885 INFO L225 Difference]: With dead ends: 169 [2021-11-09 09:33:01,885 INFO L226 Difference]: Without dead ends: 169 [2021-11-09 09:33:01,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:33:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-09 09:33:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 155. [2021-11-09 09:33:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 139 states have (on average 1.3021582733812949) internal successors, (181), 151 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2021-11-09 09:33:01,891 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 37 [2021-11-09 09:33:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:01,891 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2021-11-09 09:33:01,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2021-11-09 09:33:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2021-11-09 09:33:01,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:33:01,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:01,893 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:01,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:02,108 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr37ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:02,109 INFO L85 PathProgramCache]: Analyzing trace with hash -891826343, now seen corresponding path program 1 times [2021-11-09 09:33:02,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:02,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934225697] [2021-11-09 09:33:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:02,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:33:02,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:02,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934225697] [2021-11-09 09:33:02,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934225697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:02,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:02,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:33:02,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291751811] [2021-11-09 09:33:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:33:02,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:33:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:33:02,195 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:02,364 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2021-11-09 09:33:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:33:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 40 [2021-11-09 09:33:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:02,366 INFO L225 Difference]: With dead ends: 161 [2021-11-09 09:33:02,366 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 09:33:02,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:33:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 09:33:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2021-11-09 09:33:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 122 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2021-11-09 09:33:02,372 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 40 [2021-11-09 09:33:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:02,373 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2021-11-09 09:33:02,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2021-11-09 09:33:02,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:33:02,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:02,374 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:02,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-09 09:33:02,374 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash -891826293, now seen corresponding path program 1 times [2021-11-09 09:33:02,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:02,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264064753] [2021-11-09 09:33:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:02,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:02,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:02,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264064753] [2021-11-09 09:33:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264064753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:02,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:02,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:33:02,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312255591] [2021-11-09 09:33:02,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:33:02,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:02,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:33:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:33:02,510 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:02,857 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2021-11-09 09:33:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:33:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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 40 [2021-11-09 09:33:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:02,859 INFO L225 Difference]: With dead ends: 160 [2021-11-09 09:33:02,859 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 09:33:02,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:33:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 09:33:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 135. [2021-11-09 09:33:02,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.2857142857142858) internal successors, (153), 131 states have internal predecessors, (153), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:02,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2021-11-09 09:33:02,865 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 40 [2021-11-09 09:33:02,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:02,865 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2021-11-09 09:33:02,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:02,866 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2021-11-09 09:33:02,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 09:33:02,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:02,867 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:02,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-09 09:33:02,867 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:02,867 INFO L85 PathProgramCache]: Analyzing trace with hash -891826292, now seen corresponding path program 1 times [2021-11-09 09:33:02,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:02,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135379921] [2021-11-09 09:33:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:02,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:03,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:03,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135379921] [2021-11-09 09:33:03,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135379921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:03,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:03,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:33:03,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701504377] [2021-11-09 09:33:03,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:33:03,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:03,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:33:03,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:33:03,016 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:03,366 INFO L93 Difference]: Finished difference Result 213 states and 239 transitions. [2021-11-09 09:33:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:33:03,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 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 40 [2021-11-09 09:33:03,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:03,368 INFO L225 Difference]: With dead ends: 213 [2021-11-09 09:33:03,368 INFO L226 Difference]: Without dead ends: 213 [2021-11-09 09:33:03,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:33:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-09 09:33:03,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 135. [2021-11-09 09:33:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 131 states have internal predecessors, (152), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2021-11-09 09:33:03,374 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 40 [2021-11-09 09:33:03,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:03,374 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2021-11-09 09:33:03,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:03,374 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2021-11-09 09:33:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:33:03,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:03,375 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-09 09:33:03,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-09 09:33:03,376 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:03,376 INFO L85 PathProgramCache]: Analyzing trace with hash 671604592, now seen corresponding path program 1 times [2021-11-09 09:33:03,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:03,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539934839] [2021-11-09 09:33:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:03,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:03,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:03,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539934839] [2021-11-09 09:33:03,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539934839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:03,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054627887] [2021-11-09 09:33:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:03,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:03,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:03,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:03,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:33:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:33:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:04,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:33:04,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:33:04,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:33:04,437 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 09:33:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-09 09:33:04,453 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 09:33:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-09 09:33:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:33:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:33:04,752 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:33:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:33:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:33:04,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:33:04,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:04,997 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:33:04,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:33:05,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:33:05,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,146 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:33:05,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 54 [2021-11-09 09:33:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-09 09:33:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,363 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-09 09:33:05,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 66 [2021-11-09 09:33:05,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-11-09 09:33:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,560 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-11-09 09:33:05,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 69 [2021-11-09 09:33:05,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 69 [2021-11-09 09:33:05,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,000 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 09:33:06,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 78 [2021-11-09 09:33:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:06,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 78 [2021-11-09 09:33:06,273 INFO L354 Elim1Store]: treesize reduction 564, result has 9.5 percent of original size [2021-11-09 09:33:06,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 235 treesize of output 186 [2021-11-09 09:33:06,434 INFO L354 Elim1Store]: treesize reduction 396, result has 12.2 percent of original size [2021-11-09 09:33:06,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 27 case distinctions, treesize of input 210 treesize of output 182 [2021-11-09 09:33:07,054 INFO L354 Elim1Store]: treesize reduction 395, result has 0.8 percent of original size [2021-11-09 09:33:07,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 199 treesize of output 111 [2021-11-09 09:33:07,098 INFO L354 Elim1Store]: treesize reduction 241, result has 1.2 percent of original size [2021-11-09 09:33:07,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 50 [2021-11-09 09:33:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:07,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054627887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:07,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:07,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-11-09 09:33:07,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340784922] [2021-11-09 09:33:07,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:33:07,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:33:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:33:07,166 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:09,154 INFO L93 Difference]: Finished difference Result 215 states and 239 transitions. [2021-11-09 09:33:09,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:33:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-09 09:33:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:09,158 INFO L225 Difference]: With dead ends: 215 [2021-11-09 09:33:09,158 INFO L226 Difference]: Without dead ends: 215 [2021-11-09 09:33:09,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:33:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-09 09:33:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 156. [2021-11-09 09:33:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 140 states have (on average 1.25) internal successors, (175), 152 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 178 transitions. [2021-11-09 09:33:09,170 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 178 transitions. Word has length 42 [2021-11-09 09:33:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:09,170 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 178 transitions. [2021-11-09 09:33:09,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 178 transitions. [2021-11-09 09:33:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:33:09,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:09,172 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:09,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:09,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:33:09,387 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr34ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:09,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1948394987, now seen corresponding path program 1 times [2021-11-09 09:33:09,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:09,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128558087] [2021-11-09 09:33:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:09,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:09,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:09,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128558087] [2021-11-09 09:33:09,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128558087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:09,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:09,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 09:33:09,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748913459] [2021-11-09 09:33:09,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:33:09,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:33:09,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:33:09,559 INFO L87 Difference]: Start difference. First operand 156 states and 178 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:10,079 INFO L93 Difference]: Finished difference Result 275 states and 305 transitions. [2021-11-09 09:33:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:33:10,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-09 09:33:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:10,082 INFO L225 Difference]: With dead ends: 275 [2021-11-09 09:33:10,082 INFO L226 Difference]: Without dead ends: 275 [2021-11-09 09:33:10,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:33:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-09 09:33:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 158. [2021-11-09 09:33:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 142 states have (on average 1.2464788732394365) internal successors, (177), 154 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2021-11-09 09:33:10,098 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 42 [2021-11-09 09:33:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:10,098 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2021-11-09 09:33:10,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2021-11-09 09:33:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:33:10,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:10,100 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:10,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-09 09:33:10,100 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr35ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:10,101 INFO L85 PathProgramCache]: Analyzing trace with hash 270702622, now seen corresponding path program 1 times [2021-11-09 09:33:10,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:10,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183268566] [2021-11-09 09:33:10,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:10,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:10,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:10,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183268566] [2021-11-09 09:33:10,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183268566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:10,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:10,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 09:33:10,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843997624] [2021-11-09 09:33:10,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:33:10,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:33:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:33:10,213 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:10,779 INFO L93 Difference]: Finished difference Result 274 states and 304 transitions. [2021-11-09 09:33:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:33:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-09 09:33:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:10,782 INFO L225 Difference]: With dead ends: 274 [2021-11-09 09:33:10,782 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 09:33:10,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:33:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 09:33:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 159. [2021-11-09 09:33:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 143 states have (on average 1.2447552447552448) internal successors, (178), 155 states have internal predecessors, (178), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2021-11-09 09:33:10,788 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 43 [2021-11-09 09:33:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:10,789 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2021-11-09 09:33:10,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2021-11-09 09:33:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:33:10,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:10,790 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:10,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-09 09:33:10,791 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash -242083170, now seen corresponding path program 1 times [2021-11-09 09:33:10,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:10,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323907484] [2021-11-09 09:33:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:10,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:10,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323907484] [2021-11-09 09:33:10,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323907484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:10,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563083798] [2021-11-09 09:33:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:10,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:10,917 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:10,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:33:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:33:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:11,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:33:11,712 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:33:11,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:33:11,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-09 09:33:11,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:33:11,917 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 16 treesize of output 16 [2021-11-09 09:33:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:12,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563083798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:12,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:12,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 09:33:12,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120515053] [2021-11-09 09:33:12,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:33:12,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:33:12,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:33:12,052 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:12,947 INFO L93 Difference]: Finished difference Result 253 states and 279 transitions. [2021-11-09 09:33:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:33:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-09 09:33:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:12,950 INFO L225 Difference]: With dead ends: 253 [2021-11-09 09:33:12,950 INFO L226 Difference]: Without dead ends: 253 [2021-11-09 09:33:12,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:33:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-09 09:33:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 159. [2021-11-09 09:33:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 143 states have (on average 1.2377622377622377) internal successors, (177), 155 states have internal predecessors, (177), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2021-11-09 09:33:12,958 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 44 [2021-11-09 09:33:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:12,958 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2021-11-09 09:33:12,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2021-11-09 09:33:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 09:33:12,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:12,959 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:13,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:13,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:13,160 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr36ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash -198153139, now seen corresponding path program 1 times [2021-11-09 09:33:13,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:13,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121377159] [2021-11-09 09:33:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:13,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:33:13,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:13,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121377159] [2021-11-09 09:33:13,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121377159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:13,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:13,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:33:13,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467645371] [2021-11-09 09:33:13,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:33:13,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:33:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:33:13,233 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:13,336 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2021-11-09 09:33:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:33:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-09 09:33:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:13,340 INFO L225 Difference]: With dead ends: 158 [2021-11-09 09:33:13,340 INFO L226 Difference]: Without dead ends: 158 [2021-11-09 09:33:13,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:33:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-09 09:33:13,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-11-09 09:33:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 143 states have (on average 1.2237762237762237) internal successors, (175), 154 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2021-11-09 09:33:13,351 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 44 [2021-11-09 09:33:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:13,351 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2021-11-09 09:33:13,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2021-11-09 09:33:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:33:13,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:13,353 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] [2021-11-09 09:33:13,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-09 09:33:13,353 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:13,354 INFO L85 PathProgramCache]: Analyzing trace with hash 381530115, now seen corresponding path program 1 times [2021-11-09 09:33:13,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:13,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819791002] [2021-11-09 09:33:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:13,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:14,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819791002] [2021-11-09 09:33:14,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819791002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804875733] [2021-11-09 09:33:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:14,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:14,073 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:33:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:33:14,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:14,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:33:14,819 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:33:14,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:33:15,172 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 11 treesize of output 7 [2021-11-09 09:33:15,245 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 09:33:15,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-09 09:33:15,443 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:33:15,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 19 [2021-11-09 09:33:15,601 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 09:33:15,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-11-09 09:33:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:15,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804875733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:15,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:15,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-09 09:33:15,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457785120] [2021-11-09 09:33:15,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:33:15,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:33:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:33:15,643 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:17,491 INFO L93 Difference]: Finished difference Result 285 states and 313 transitions. [2021-11-09 09:33:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:33:17,492 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 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 46 [2021-11-09 09:33:17,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:17,493 INFO L225 Difference]: With dead ends: 285 [2021-11-09 09:33:17,494 INFO L226 Difference]: Without dead ends: 285 [2021-11-09 09:33:17,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:33:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-09 09:33:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 205. [2021-11-09 09:33:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 190 states have (on average 1.2105263157894737) internal successors, (230), 201 states have internal predecessors, (230), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:17,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 233 transitions. [2021-11-09 09:33:17,502 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 233 transitions. Word has length 46 [2021-11-09 09:33:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:17,502 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 233 transitions. [2021-11-09 09:33:17,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 23 states have internal predecessors, (82), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 233 transitions. [2021-11-09 09:33:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:33:17,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:17,504 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] [2021-11-09 09:33:17,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:17,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:17,732 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash 381530116, now seen corresponding path program 1 times [2021-11-09 09:33:17,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:17,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084251108] [2021-11-09 09:33:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:17,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:18,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:18,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084251108] [2021-11-09 09:33:18,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084251108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:18,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82333163] [2021-11-09 09:33:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:18,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:18,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:18,055 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:18,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:33:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:33:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:18,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:33:18,726 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:33:18,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:33:19,025 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 13 treesize of output 9 [2021-11-09 09:33:19,056 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 13 treesize of output 9 [2021-11-09 09:33:19,118 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 09:33:19,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 63 [2021-11-09 09:33:19,129 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 09:33:19,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 59 [2021-11-09 09:33:19,272 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-09 09:33:19,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 52 [2021-11-09 09:33:19,276 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:19,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2021-11-09 09:33:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82333163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:19,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:19,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-11-09 09:33:19,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736905456] [2021-11-09 09:33:19,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:33:19,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:33:19,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:33:19,394 INFO L87 Difference]: Start difference. First operand 205 states and 233 transitions. Second operand has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:20,371 INFO L93 Difference]: Finished difference Result 251 states and 277 transitions. [2021-11-09 09:33:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:33:20,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 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 46 [2021-11-09 09:33:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:20,373 INFO L225 Difference]: With dead ends: 251 [2021-11-09 09:33:20,373 INFO L226 Difference]: Without dead ends: 251 [2021-11-09 09:33:20,374 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:33:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-09 09:33:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 216. [2021-11-09 09:33:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 201 states have (on average 1.2338308457711442) internal successors, (248), 212 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 251 transitions. [2021-11-09 09:33:20,380 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 251 transitions. Word has length 46 [2021-11-09 09:33:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:20,381 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 251 transitions. [2021-11-09 09:33:20,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.352941176470588) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 251 transitions. [2021-11-09 09:33:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:33:20,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:20,382 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:20,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:20,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:33:20,596 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:20,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1446600400, now seen corresponding path program 1 times [2021-11-09 09:33:20,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:20,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508569517] [2021-11-09 09:33:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:20,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:21,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:21,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508569517] [2021-11-09 09:33:21,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508569517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:21,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218226128] [2021-11-09 09:33:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:21,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:21,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:21,220 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:21,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:33:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:22,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:33:22,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:22,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:33:22,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:33:22,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:33:22,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:33:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,315 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:33:22,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2021-11-09 09:33:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,493 INFO L354 Elim1Store]: treesize reduction 88, result has 27.9 percent of original size [2021-11-09 09:33:22,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2021-11-09 09:33:22,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:33:22,719 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-09 09:33:22,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 64 [2021-11-09 09:33:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:33:22,869 INFO L354 Elim1Store]: treesize reduction 93, result has 15.5 percent of original size [2021-11-09 09:33:22,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 73 [2021-11-09 09:33:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:23,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:33:23,082 INFO L354 Elim1Store]: treesize reduction 94, result has 22.3 percent of original size [2021-11-09 09:33:23,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 69 treesize of output 83 [2021-11-09 09:33:23,976 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 7 treesize of output 3 [2021-11-09 09:33:24,795 INFO L354 Elim1Store]: treesize reduction 80, result has 32.8 percent of original size [2021-11-09 09:33:24,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 86 [2021-11-09 09:33:25,245 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:33:25,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-11-09 09:33:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:25,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218226128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:25,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:25,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-11-09 09:33:25,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383647174] [2021-11-09 09:33:25,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:33:25,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:25,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:33:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:33:25,327 INFO L87 Difference]: Start difference. First operand 216 states and 251 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:29,944 INFO L93 Difference]: Finished difference Result 464 states and 553 transitions. [2021-11-09 09:33:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 09:33:29,945 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-09 09:33:29,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:29,947 INFO L225 Difference]: With dead ends: 464 [2021-11-09 09:33:29,947 INFO L226 Difference]: Without dead ends: 464 [2021-11-09 09:33:29,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=561, Invalid=4841, Unknown=0, NotChecked=0, Total=5402 [2021-11-09 09:33:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-09 09:33:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 244. [2021-11-09 09:33:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 229 states have (on average 1.2139737991266375) internal successors, (278), 240 states have internal predecessors, (278), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:29,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 281 transitions. [2021-11-09 09:33:29,959 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 281 transitions. Word has length 46 [2021-11-09 09:33:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:29,960 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 281 transitions. [2021-11-09 09:33:29,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 281 transitions. [2021-11-09 09:33:29,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:33:29,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:29,962 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:30,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:30,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:33:30,176 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1057468911, now seen corresponding path program 1 times [2021-11-09 09:33:30,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:30,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524704627] [2021-11-09 09:33:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:30,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:30,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:30,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524704627] [2021-11-09 09:33:30,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524704627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:30,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183800344] [2021-11-09 09:33:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:30,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:30,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:30,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:30,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:33:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:33:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:31,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:33:31,236 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:33:31,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:33:31,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:33:31,492 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 09:33:31,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 09:33:31,617 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:33:31,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 18 [2021-11-09 09:33:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:31,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183800344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:31,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:31,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-11-09 09:33:31,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56061322] [2021-11-09 09:33:31,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:33:31,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:33:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:33:31,652 INFO L87 Difference]: Start difference. First operand 244 states and 281 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:32,405 INFO L93 Difference]: Finished difference Result 278 states and 305 transitions. [2021-11-09 09:33:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:33:32,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 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 47 [2021-11-09 09:33:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:32,408 INFO L225 Difference]: With dead ends: 278 [2021-11-09 09:33:32,408 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 09:33:32,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:33:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 09:33:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 244. [2021-11-09 09:33:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 229 states have (on average 1.205240174672489) internal successors, (276), 240 states have internal predecessors, (276), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 279 transitions. [2021-11-09 09:33:32,418 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 279 transitions. Word has length 47 [2021-11-09 09:33:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:32,418 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 279 transitions. [2021-11-09 09:33:32,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 279 transitions. [2021-11-09 09:33:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:33:32,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:32,420 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:32,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:32,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:32,644 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1578223172, now seen corresponding path program 1 times [2021-11-09 09:33:32,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:32,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151172583] [2021-11-09 09:33:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:32,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:32,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 09:33:32,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:32,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151172583] [2021-11-09 09:33:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151172583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:32,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:32,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:33:32,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98254164] [2021-11-09 09:33:32,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:33:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:33:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:33:32,735 INFO L87 Difference]: Start difference. First operand 244 states and 279 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:32,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:32,884 INFO L93 Difference]: Finished difference Result 267 states and 308 transitions. [2021-11-09 09:33:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:33:32,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 48 [2021-11-09 09:33:32,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:32,889 INFO L225 Difference]: With dead ends: 267 [2021-11-09 09:33:32,889 INFO L226 Difference]: Without dead ends: 267 [2021-11-09 09:33:32,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:33:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-09 09:33:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 243. [2021-11-09 09:33:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.2008733624454149) internal successors, (275), 239 states have internal predecessors, (275), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 278 transitions. [2021-11-09 09:33:32,895 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 278 transitions. Word has length 48 [2021-11-09 09:33:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:32,896 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 278 transitions. [2021-11-09 09:33:32,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 278 transitions. [2021-11-09 09:33:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:33:32,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:32,897 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:32,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-09 09:33:32,898 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1578223173, now seen corresponding path program 1 times [2021-11-09 09:33:32,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:32,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58674397] [2021-11-09 09:33:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:32,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:33,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:33,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:33,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58674397] [2021-11-09 09:33:33,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58674397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:33,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580803224] [2021-11-09 09:33:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:33,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:33,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:33,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:33:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:33,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:33:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:33,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:33:34,057 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:33:34,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:33:34,285 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 13 treesize of output 9 [2021-11-09 09:33:34,327 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 23 treesize of output 22 [2021-11-09 09:33:34,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:33:34,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 09:33:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580803224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:34,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:34,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-11-09 09:33:34,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721061781] [2021-11-09 09:33:34,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:33:34,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:33:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:33:34,546 INFO L87 Difference]: Start difference. First operand 243 states and 278 transitions. Second operand has 17 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:35,784 INFO L93 Difference]: Finished difference Result 370 states and 417 transitions. [2021-11-09 09:33:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:33:35,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 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 48 [2021-11-09 09:33:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:35,786 INFO L225 Difference]: With dead ends: 370 [2021-11-09 09:33:35,786 INFO L226 Difference]: Without dead ends: 370 [2021-11-09 09:33:35,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:33:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-09 09:33:35,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 290. [2021-11-09 09:33:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 276 states have (on average 1.2355072463768115) internal successors, (341), 286 states have internal predecessors, (341), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 344 transitions. [2021-11-09 09:33:35,794 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 344 transitions. Word has length 48 [2021-11-09 09:33:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:35,794 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 344 transitions. [2021-11-09 09:33:35,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 344 transitions. [2021-11-09 09:33:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:33:35,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:35,796 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:35,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:36,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:36,012 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -573133933, now seen corresponding path program 1 times [2021-11-09 09:33:36,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:36,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564768321] [2021-11-09 09:33:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:36,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:36,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:36,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:36,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:36,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564768321] [2021-11-09 09:33:36,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564768321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:36,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58126668] [2021-11-09 09:33:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:36,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:36,170 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:36,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:33:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:33:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:33:37,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58126668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:37,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:33:37,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-11-09 09:33:37,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857425153] [2021-11-09 09:33:37,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:33:37,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:33:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:33:37,345 INFO L87 Difference]: Start difference. First operand 290 states and 344 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:37,581 INFO L93 Difference]: Finished difference Result 290 states and 342 transitions. [2021-11-09 09:33:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:33:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:33:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:37,583 INFO L225 Difference]: With dead ends: 290 [2021-11-09 09:33:37,583 INFO L226 Difference]: Without dead ends: 290 [2021-11-09 09:33:37,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:33:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-11-09 09:33:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 263. [2021-11-09 09:33:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 249 states have (on average 1.2369477911646587) internal successors, (308), 259 states have internal predecessors, (308), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 311 transitions. [2021-11-09 09:33:37,591 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 311 transitions. Word has length 50 [2021-11-09 09:33:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:37,592 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 311 transitions. [2021-11-09 09:33:37,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:33:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 311 transitions. [2021-11-09 09:33:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 09:33:37,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:37,594 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:37,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:37,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:37,808 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:33:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash 868585923, now seen corresponding path program 1 times [2021-11-09 09:33:37,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:37,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010386249] [2021-11-09 09:33:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:37,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:38,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:33:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:38,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:38,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010386249] [2021-11-09 09:33:38,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010386249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:38,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908643287] [2021-11-09 09:33:38,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:38,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:38,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:38,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:38,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:33:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-09 09:33:39,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:39,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:33:39,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 09:33:39,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:33:39,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-09 09:33:39,436 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 09:33:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-09 09:33:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:33:39,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:33:39,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:33:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:33:39,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:33:39,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:33:39,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:33:39,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 09:33:39,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:39,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 09:33:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,106 INFO L354 Elim1Store]: treesize reduction 76, result has 49.0 percent of original size [2021-11-09 09:33:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 95 [2021-11-09 09:33:40,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,200 INFO L354 Elim1Store]: treesize reduction 94, result has 36.9 percent of original size [2021-11-09 09:33:40,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 74 [2021-11-09 09:33:40,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:40,995 INFO L354 Elim1Store]: treesize reduction 202, result has 20.5 percent of original size [2021-11-09 09:33:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 194 treesize of output 198 [2021-11-09 09:33:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:41,098 INFO L354 Elim1Store]: treesize reduction 134, result has 39.6 percent of original size [2021-11-09 09:33:41,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 180 treesize of output 233 [2021-11-09 09:33:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,328 INFO L354 Elim1Store]: treesize reduction 270, result has 22.6 percent of original size [2021-11-09 09:33:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 241 treesize of output 271 [2021-11-09 09:33:43,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:43,461 INFO L354 Elim1Store]: treesize reduction 278, result has 20.3 percent of original size [2021-11-09 09:33:43,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 268 treesize of output 302 [2021-11-09 09:33:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,434 INFO L354 Elim1Store]: treesize reduction 386, result has 24.9 percent of original size [2021-11-09 09:33:45,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 297 treesize of output 355 [2021-11-09 09:33:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:45,628 INFO L354 Elim1Store]: treesize reduction 386, result has 24.9 percent of original size [2021-11-09 09:33:45,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 361 treesize of output 431 [2021-11-09 09:33:50,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,633 INFO L354 Elim1Store]: treesize reduction 262, result has 13.8 percent of original size [2021-11-09 09:33:50,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 464 treesize of output 490 [2021-11-09 09:33:50,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:50,772 INFO L354 Elim1Store]: treesize reduction 266, result has 29.3 percent of original size [2021-11-09 09:33:50,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 604 treesize of output 600 [2021-11-09 09:34:04,115 INFO L354 Elim1Store]: treesize reduction 78, result has 63.4 percent of original size [2021-11-09 09:34:04,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 535 treesize of output 475 [2021-11-09 09:34:11,877 INFO L354 Elim1Store]: treesize reduction 118, result has 53.4 percent of original size [2021-11-09 09:34:11,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 214 treesize of output 263 [2021-11-09 09:34:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:15,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908643287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:15,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:15,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 38 [2021-11-09 09:34:15,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021585244] [2021-11-09 09:34:15,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:34:15,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:34:15,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:34:15,343 INFO L87 Difference]: Start difference. First operand 263 states and 311 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:24,007 INFO L93 Difference]: Finished difference Result 420 states and 499 transitions. [2021-11-09 09:34:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:34:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-09 09:34:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:24,011 INFO L225 Difference]: With dead ends: 420 [2021-11-09 09:34:24,012 INFO L226 Difference]: Without dead ends: 420 [2021-11-09 09:34:24,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=696, Invalid=5946, Unknown=0, NotChecked=0, Total=6642 [2021-11-09 09:34:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-09 09:34:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 267. [2021-11-09 09:34:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 253 states have (on average 1.233201581027668) internal successors, (312), 263 states have internal predecessors, (312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 315 transitions. [2021-11-09 09:34:24,020 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 315 transitions. Word has length 50 [2021-11-09 09:34:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:24,020 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 315 transitions. [2021-11-09 09:34:24,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 315 transitions. [2021-11-09 09:34:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:34:24,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:24,021 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, 1] [2021-11-09 09:34:24,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-09 09:34:24,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:34:24,236 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:34:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash -160380615, now seen corresponding path program 1 times [2021-11-09 09:34:24,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:24,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240435536] [2021-11-09 09:34:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:24,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:24,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:34:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:24,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:24,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240435536] [2021-11-09 09:34:24,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240435536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:24,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75400165] [2021-11-09 09:34:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:24,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:24,664 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:24,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:34:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:34:25,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:25,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:34:25,818 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:34:25,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:34:25,892 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 11 treesize of output 7 [2021-11-09 09:34:25,900 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 11 treesize of output 7 [2021-11-09 09:34:25,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:25,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:34:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:25,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:34:26,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:34:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:34:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:34:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:26,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:34:26,303 INFO L354 Elim1Store]: treesize reduction 216, result has 15.0 percent of original size [2021-11-09 09:34:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 134 [2021-11-09 09:34:26,328 INFO L354 Elim1Store]: treesize reduction 134, result has 21.2 percent of original size [2021-11-09 09:34:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 176 treesize of output 136 [2021-11-09 09:34:27,062 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-09 09:34:27,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 118 treesize of output 68 [2021-11-09 09:34:27,078 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-09 09:34:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 29 [2021-11-09 09:34:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:27,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75400165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:27,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:27,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-11-09 09:34:27,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781464628] [2021-11-09 09:34:27,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:34:27,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:34:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:34:27,140 INFO L87 Difference]: Start difference. First operand 267 states and 315 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:28,623 INFO L93 Difference]: Finished difference Result 350 states and 409 transitions. [2021-11-09 09:34:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 09:34:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-09 09:34:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:28,625 INFO L225 Difference]: With dead ends: 350 [2021-11-09 09:34:28,626 INFO L226 Difference]: Without dead ends: 350 [2021-11-09 09:34:28,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=2051, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:34:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-09 09:34:28,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 301. [2021-11-09 09:34:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 287 states have (on average 1.240418118466899) internal successors, (356), 297 states have internal predecessors, (356), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 359 transitions. [2021-11-09 09:34:28,635 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 359 transitions. Word has length 51 [2021-11-09 09:34:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:28,636 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 359 transitions. [2021-11-09 09:34:28,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 25 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 359 transitions. [2021-11-09 09:34:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:34:28,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:28,637 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:28,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:28,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:28,848 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:34:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1156359249, now seen corresponding path program 1 times [2021-11-09 09:34:28,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:28,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288652279] [2021-11-09 09:34:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:28,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:29,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:34:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:29,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:29,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288652279] [2021-11-09 09:34:29,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288652279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:29,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975073975] [2021-11-09 09:34:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:29,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:29,198 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:29,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:34:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:34:30,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:30,628 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 29 treesize of output 25 [2021-11-09 09:34:30,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:34:30,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-09 09:34:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:31,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975073975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:31,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:31,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-11-09 09:34:31,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557897850] [2021-11-09 09:34:31,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:34:31,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:34:31,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:34:31,503 INFO L87 Difference]: Start difference. First operand 301 states and 359 transitions. Second operand has 26 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:33,622 INFO L93 Difference]: Finished difference Result 303 states and 360 transitions. [2021-11-09 09:34:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:34:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-09 09:34:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:33,625 INFO L225 Difference]: With dead ends: 303 [2021-11-09 09:34:33,625 INFO L226 Difference]: Without dead ends: 285 [2021-11-09 09:34:33,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:34:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-09 09:34:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-11-09 09:34:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 271 states have (on average 1.2509225092250922) internal successors, (339), 281 states have internal predecessors, (339), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 342 transitions. [2021-11-09 09:34:33,632 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 342 transitions. Word has length 51 [2021-11-09 09:34:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:33,632 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 342 transitions. [2021-11-09 09:34:33,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:33,633 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 342 transitions. [2021-11-09 09:34:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 09:34:33,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:33,634 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:33,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:33,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 09:34:33,848 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr38ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:34:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash -676833141, now seen corresponding path program 1 times [2021-11-09 09:34:33,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:33,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101681739] [2021-11-09 09:34:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:33,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:34,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:34:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:34,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:34,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101681739] [2021-11-09 09:34:34,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101681739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:34,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349370548] [2021-11-09 09:34:34,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:34,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:34,130 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:34,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:34:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:34:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:35,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:34:35,544 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:34:35,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:34:35,731 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 11 treesize of output 7 [2021-11-09 09:34:35,771 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 09:34:35,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-09 09:34:35,870 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:34:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 19 [2021-11-09 09:34:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:35,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349370548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:35,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:35,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 14 [2021-11-09 09:34:35,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5989306] [2021-11-09 09:34:35,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:34:35,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:35,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:34:35,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:34:35,912 INFO L87 Difference]: Start difference. First operand 285 states and 342 transitions. Second operand has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:36,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:36,774 INFO L93 Difference]: Finished difference Result 341 states and 401 transitions. [2021-11-09 09:34:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:34:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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 52 [2021-11-09 09:34:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:36,776 INFO L225 Difference]: With dead ends: 341 [2021-11-09 09:34:36,776 INFO L226 Difference]: Without dead ends: 341 [2021-11-09 09:34:36,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:34:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-09 09:34:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 285. [2021-11-09 09:34:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 271 states have (on average 1.2509225092250922) internal successors, (339), 281 states have internal predecessors, (339), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:36,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 342 transitions. [2021-11-09 09:34:36,788 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 342 transitions. Word has length 52 [2021-11-09 09:34:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:36,788 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 342 transitions. [2021-11-09 09:34:36,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 342 transitions. [2021-11-09 09:34:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:34:36,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:36,790 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:36,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:37,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 09:34:37,016 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:34:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1335528780, now seen corresponding path program 2 times [2021-11-09 09:34:37,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:37,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914294062] [2021-11-09 09:34:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:37,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:37,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:34:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:37,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:37,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914294062] [2021-11-09 09:34:37,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914294062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:37,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677891481] [2021-11-09 09:34:37,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:34:37,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:37,569 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:37,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:34:38,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:34:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:34:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:34:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:38,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:34:39,024 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:34:39,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:34:39,063 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 13 treesize of output 9 [2021-11-09 09:34:39,073 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 13 treesize of output 9 [2021-11-09 09:34:39,107 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 28 treesize of output 23 [2021-11-09 09:34:39,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-09 09:34:39,121 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 28 treesize of output 23 [2021-11-09 09:34:39,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-11-09 09:34:39,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:34:39,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:34:39,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:34:39,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:34:39,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 09:34:39,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 09:34:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2021-11-09 09:34:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2021-11-09 09:34:39,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:40,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:40,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:34:40,012 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:34:40,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 182 treesize of output 105 [2021-11-09 09:34:40,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:40,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:40,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:34:40,024 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:34:40,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 122 [2021-11-09 09:34:40,903 INFO L354 Elim1Store]: treesize reduction 42, result has 46.8 percent of original size [2021-11-09 09:34:40,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 106 [2021-11-09 09:34:40,953 INFO L354 Elim1Store]: treesize reduction 26, result has 58.7 percent of original size [2021-11-09 09:34:40,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 95 [2021-11-09 09:34:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:41,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677891481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:41,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:41,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-11-09 09:34:41,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334616128] [2021-11-09 09:34:41,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:34:41,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:34:41,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:34:41,401 INFO L87 Difference]: Start difference. First operand 285 states and 342 transitions. Second operand has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 27 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:34:43,950 INFO L93 Difference]: Finished difference Result 339 states and 397 transitions. [2021-11-09 09:34:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:34:43,950 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 27 states have internal predecessors, (85), 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 55 [2021-11-09 09:34:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:34:43,952 INFO L225 Difference]: With dead ends: 339 [2021-11-09 09:34:43,952 INFO L226 Difference]: Without dead ends: 339 [2021-11-09 09:34:43,953 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:34:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-09 09:34:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 289. [2021-11-09 09:34:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 275 states have (on average 1.2472727272727273) internal successors, (343), 285 states have internal predecessors, (343), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 346 transitions. [2021-11-09 09:34:43,959 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 346 transitions. Word has length 55 [2021-11-09 09:34:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:34:43,959 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 346 transitions. [2021-11-09 09:34:43,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0357142857142856) internal successors, (85), 27 states have internal predecessors, (85), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:34:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 346 transitions. [2021-11-09 09:34:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:34:43,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:34:43,961 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:34:43,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:34:44,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 09:34:44,172 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:34:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:34:44,173 INFO L85 PathProgramCache]: Analyzing trace with hash 583118602, now seen corresponding path program 1 times [2021-11-09 09:34:44,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:34:44,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528476658] [2021-11-09 09:34:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:44,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:34:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:45,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:34:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:45,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:34:45,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528476658] [2021-11-09 09:34:45,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528476658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:45,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003537399] [2021-11-09 09:34:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:34:45,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:34:45,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:34:45,287 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:34:45,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:34:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:34:46,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:34:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:34:46,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:34:46,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:34:46,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:46,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:34:46,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:46,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:46,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:34:46,979 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:34:46,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 09:34:47,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:47,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:34:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:47,151 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:34:47,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:34:47,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:47,254 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:34:47,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 54 [2021-11-09 09:34:47,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:47,386 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-09 09:34:47,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 66 [2021-11-09 09:34:47,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:47,556 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-11-09 09:34:47,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 69 [2021-11-09 09:34:47,720 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 09:34:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 09:34:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:47,974 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 09:34:47,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 76 [2021-11-09 09:34:48,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:48,416 INFO L354 Elim1Store]: treesize reduction 264, result has 23.3 percent of original size [2021-11-09 09:34:48,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 83 treesize of output 113 [2021-11-09 09:34:48,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:48,879 INFO L354 Elim1Store]: treesize reduction 133, result has 5.0 percent of original size [2021-11-09 09:34:48,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 102 treesize of output 122 [2021-11-09 09:34:49,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:49,216 INFO L354 Elim1Store]: treesize reduction 180, result has 8.6 percent of original size [2021-11-09 09:34:49,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 13 case distinctions, treesize of input 117 treesize of output 125 [2021-11-09 09:34:49,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:49,672 INFO L354 Elim1Store]: treesize reduction 456, result has 12.1 percent of original size [2021-11-09 09:34:49,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 31 case distinctions, treesize of input 138 treesize of output 143 [2021-11-09 09:34:51,419 INFO L354 Elim1Store]: treesize reduction 374, result has 4.3 percent of original size [2021-11-09 09:34:51,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 27 case distinctions, treesize of input 130 treesize of output 132 [2021-11-09 09:34:51,948 INFO L354 Elim1Store]: treesize reduction 778, result has 10.2 percent of original size [2021-11-09 09:34:51,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 51 case distinctions, treesize of input 192 treesize of output 155 [2021-11-09 09:34:53,585 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-11-09 09:34:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 205 treesize of output 61 [2021-11-09 09:34:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:34:53,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003537399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:34:53,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:34:53,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-11-09 09:34:53,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624755092] [2021-11-09 09:34:53,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:34:53,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:34:53,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:34:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1579, Unknown=1, NotChecked=0, Total=1722 [2021-11-09 09:34:53,687 INFO L87 Difference]: Start difference. First operand 289 states and 346 transitions. Second operand has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:00,911 INFO L93 Difference]: Finished difference Result 421 states and 497 transitions. [2021-11-09 09:35:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 09:35:00,912 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 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 55 [2021-11-09 09:35:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:00,915 INFO L225 Difference]: With dead ends: 421 [2021-11-09 09:35:00,915 INFO L226 Difference]: Without dead ends: 421 [2021-11-09 09:35:00,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=978, Invalid=7763, Unknown=1, NotChecked=0, Total=8742 [2021-11-09 09:35:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-09 09:35:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 327. [2021-11-09 09:35:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 313 states have (on average 1.2268370607028753) internal successors, (384), 323 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 387 transitions. [2021-11-09 09:35:00,927 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 387 transitions. Word has length 55 [2021-11-09 09:35:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:00,927 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 387 transitions. [2021-11-09 09:35:00,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 387 transitions. [2021-11-09 09:35:00,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:35:00,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:00,929 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:00,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:01,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 09:35:01,144 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:35:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -557783558, now seen corresponding path program 2 times [2021-11-09 09:35:01,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:01,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144241488] [2021-11-09 09:35:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:01,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:01,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:35:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:01,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:01,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144241488] [2021-11-09 09:35:01,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144241488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:01,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281960836] [2021-11-09 09:35:01,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:35:01,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:01,737 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:01,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:35:03,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:35:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:03,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:35:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:03,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:35:03,761 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 09:35:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-09 09:35:03,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:03,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:03,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:03,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:35:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:35:03,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:35:03,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:03,939 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-09 09:35:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-11-09 09:35:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:04,008 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-11-09 09:35:04,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-11-09 09:35:04,052 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 17 treesize of output 13 [2021-11-09 09:35:04,164 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 09:35:04,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 09:35:04,257 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 26 [2021-11-09 09:35:04,336 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:35:04,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2021-11-09 09:35:04,431 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:35:04,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-11-09 09:35:04,532 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-09 09:35:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 60 [2021-11-09 09:35:04,654 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-11-09 09:35:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 63 [2021-11-09 09:35:04,887 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 09:35:04,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 70 [2021-11-09 09:35:05,031 INFO L354 Elim1Store]: treesize reduction 302, result has 11.7 percent of original size [2021-11-09 09:35:05,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 118 treesize of output 82 [2021-11-09 09:35:05,441 INFO L354 Elim1Store]: treesize reduction 174, result has 0.6 percent of original size [2021-11-09 09:35:05,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 42 [2021-11-09 09:35:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:05,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281960836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:05,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:05,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-11-09 09:35:05,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772698091] [2021-11-09 09:35:05,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:35:05,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:05,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:35:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1036, Unknown=1, NotChecked=0, Total=1190 [2021-11-09 09:35:05,638 INFO L87 Difference]: Start difference. First operand 327 states and 387 transitions. Second operand has 35 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:08,129 INFO L93 Difference]: Finished difference Result 454 states and 534 transitions. [2021-11-09 09:35:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 09:35:08,130 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 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 55 [2021-11-09 09:35:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:08,132 INFO L225 Difference]: With dead ends: 454 [2021-11-09 09:35:08,132 INFO L226 Difference]: Without dead ends: 454 [2021-11-09 09:35:08,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=795, Invalid=5055, Unknown=2, NotChecked=0, Total=5852 [2021-11-09 09:35:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-11-09 09:35:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 328. [2021-11-09 09:35:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 314 states have (on average 1.2292993630573248) internal successors, (386), 324 states have internal predecessors, (386), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 389 transitions. [2021-11-09 09:35:08,144 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 389 transitions. Word has length 55 [2021-11-09 09:35:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:08,144 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 389 transitions. [2021-11-09 09:35:08,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 389 transitions. [2021-11-09 09:35:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 09:35:08,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:08,148 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:08,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:08,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:08,372 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:35:08,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:08,372 INFO L85 PathProgramCache]: Analyzing trace with hash -557783557, now seen corresponding path program 1 times [2021-11-09 09:35:08,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:08,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869587143] [2021-11-09 09:35:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:08,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:09,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:35:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:09,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:09,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869587143] [2021-11-09 09:35:09,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869587143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:09,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23368449] [2021-11-09 09:35:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:09,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:09,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:09,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:09,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:35:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:10,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-09 09:35:10,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:10,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:35:10,942 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 09:35:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:10,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 20 [2021-11-09 09:35:10,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:10,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:35:10,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:35:11,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:35:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:11,129 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:35:11,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2021-11-09 09:35:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:11,198 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:35:11,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-11-09 09:35:11,345 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 22 treesize of output 18 [2021-11-09 09:35:11,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:35:11,527 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-09 09:35:11,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 22 [2021-11-09 09:35:11,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 09:35:11,610 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 26 [2021-11-09 09:35:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:35:11,733 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:35:11,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2021-11-09 09:35:11,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:11,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:35:11,856 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:35:11,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-11-09 09:35:11,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:11,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-09 09:35:12,011 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-09 09:35:12,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 60 [2021-11-09 09:35:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-09 09:35:12,194 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-11-09 09:35:12,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 61 treesize of output 57 [2021-11-09 09:35:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2021-11-09 09:35:12,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,631 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 09:35:12,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 72 [2021-11-09 09:35:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-11-09 09:35:12,871 INFO L354 Elim1Store]: treesize reduction 458, result has 10.2 percent of original size [2021-11-09 09:35:12,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 244 treesize of output 180 [2021-11-09 09:35:12,938 INFO L354 Elim1Store]: treesize reduction 300, result has 13.8 percent of original size [2021-11-09 09:35:12,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 219 treesize of output 188 [2021-11-09 09:35:13,455 INFO L354 Elim1Store]: treesize reduction 254, result has 0.4 percent of original size [2021-11-09 09:35:13,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 109 [2021-11-09 09:35:13,464 INFO L354 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2021-11-09 09:35:13,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 91 treesize of output 55 [2021-11-09 09:35:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:13,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23368449] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:13,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:35:13,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 37 [2021-11-09 09:35:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641090601] [2021-11-09 09:35:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:35:13,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:35:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:35:13,600 INFO L87 Difference]: Start difference. First operand 328 states and 389 transitions. Second operand has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:18,125 INFO L93 Difference]: Finished difference Result 445 states and 514 transitions. [2021-11-09 09:35:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 09:35:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 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 55 [2021-11-09 09:35:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:18,128 INFO L225 Difference]: With dead ends: 445 [2021-11-09 09:35:18,128 INFO L226 Difference]: Without dead ends: 445 [2021-11-09 09:35:18,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=633, Invalid=5067, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:35:18,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-11-09 09:35:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 328. [2021-11-09 09:35:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 314 states have (on average 1.2261146496815287) internal successors, (385), 324 states have internal predecessors, (385), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 388 transitions. [2021-11-09 09:35:18,137 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 388 transitions. Word has length 55 [2021-11-09 09:35:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:18,137 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 388 transitions. [2021-11-09 09:35:18,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 388 transitions. [2021-11-09 09:35:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 09:35:18,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:18,139 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:18,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:18,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 09:35:18,364 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr40ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:35:18,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1548281368, now seen corresponding path program 2 times [2021-11-09 09:35:18,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:18,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455328321] [2021-11-09 09:35:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:18,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:35:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:18,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:18,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455328321] [2021-11-09 09:35:18,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455328321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:18,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152028788] [2021-11-09 09:35:18,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:35:18,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:18,852 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:18,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:35:20,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:35:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:20,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:35:20,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:21,003 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 09:35:21,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-11-09 09:35:21,319 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 11 treesize of output 7 [2021-11-09 09:35:21,371 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 09:35:21,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2021-11-09 09:35:21,586 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:35:21,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 24 [2021-11-09 09:35:21,752 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 09:35:21,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:35:21,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~1.base] [2021-11-09 09:35:21,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:35:21,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:35:21,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15949227] [2021-11-09 09:35:21,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:35:21,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:35:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:35:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:35:21,791 INFO L87 Difference]: Start difference. First operand 328 states and 388 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:35:22,284 INFO L93 Difference]: Finished difference Result 343 states and 402 transitions. [2021-11-09 09:35:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:35:22,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 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 56 [2021-11-09 09:35:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:35:22,286 INFO L225 Difference]: With dead ends: 343 [2021-11-09 09:35:22,286 INFO L226 Difference]: Without dead ends: 322 [2021-11-09 09:35:22,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:35:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-09 09:35:22,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-11-09 09:35:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 308 states have (on average 1.2272727272727273) internal successors, (378), 318 states have internal predecessors, (378), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 381 transitions. [2021-11-09 09:35:22,293 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 381 transitions. Word has length 56 [2021-11-09 09:35:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:35:22,293 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 381 transitions. [2021-11-09 09:35:22,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:35:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 381 transitions. [2021-11-09 09:35:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 09:35:22,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:35:22,295 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:35:22,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:35:22,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:22,508 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr32REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 36 more)] === [2021-11-09 09:35:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:35:22,508 INFO L85 PathProgramCache]: Analyzing trace with hash -821268619, now seen corresponding path program 2 times [2021-11-09 09:35:22,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:35:22,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253187835] [2021-11-09 09:35:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:35:22,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:35:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:23,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:35:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:35:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:35:23,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:35:23,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253187835] [2021-11-09 09:35:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253187835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:35:23,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290136767] [2021-11-09 09:35:23,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:35:23,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:35:23,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:35:23,165 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:35:23,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c9fcf6a-c8dd-4286-83d1-affb90c1518a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:35:25,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:35:25,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:35:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-09 09:35:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:35:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:35:25,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:35:25,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:35:25,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:35:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 09:35:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:35:25,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 09:35:25,450 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:35:25,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:35:25,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:35:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-09 09:35:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,615 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 09:35:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:35:25,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 09:35:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,721 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:35:25,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 54 [2021-11-09 09:35:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-09 09:35:25,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,896 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-09 09:35:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 66 [2021-11-09 09:35:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:25,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2021-11-09 09:35:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,084 INFO L354 Elim1Store]: treesize reduction 188, result has 15.7 percent of original size [2021-11-09 09:35:26,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 69 [2021-11-09 09:35:26,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 69 [2021-11-09 09:35:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,441 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 09:35:26,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 78 [2021-11-09 09:35:26,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:35:26,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 78 [2021-11-09 09:35:26,663 INFO L354 Elim1Store]: treesize reduction 246, result has 13.4 percent of original size [2021-11-09 09:35:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 178 treesize of output 182 [2021-11-09 09:35:26,693 INFO L354 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2021-11-09 09:35:26,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 9 case distinctions, treesize of input 161 treesize of output 141 [2021-11-09 09:35:27,014 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:35:27,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 09:35:27,314 INFO L354 Elim1Store]: treesize reduction 372, result has 16.4 percent of original size [2021-11-09 09:35:27,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 22 case distinctions, treesize of input 218 treesize of output 239 [2021-11-09 09:35:27,394 INFO L354 Elim1Store]: treesize reduction 460, result has 16.8 percent of original size [2021-11-09 09:35:27,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 252 treesize of output 262 [2021-11-09 09:35:27,741 INFO L354 Elim1Store]: treesize reduction 470, result has 14.9 percent of original size [2021-11-09 09:35:27,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 27 case distinctions, treesize of input 326 treesize of output 330 [2021-11-09 09:35:27,852 INFO L354 Elim1Store]: treesize reduction 566, result has 15.0 percent of original size [2021-11-09 09:35:27,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 366 treesize of output 357 [2021-11-09 09:35:28,331 INFO L354 Elim1Store]: treesize reduction 288, result has 19.8 percent of original size [2021-11-09 09:35:28,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 335 treesize of output 318 [2021-11-09 09:35:28,423 INFO L354 Elim1Store]: treesize reduction 460, result has 17.4 percent of original size [2021-11-09 09:35:28,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 5 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 376 treesize of output 427 [2021-11-09 09:35:29,044 INFO L354 Elim1Store]: treesize reduction 394, result has 17.6 percent of original size [2021-11-09 09:35:29,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 5 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 421 treesize of output 393 [2021-11-09 09:35:29,173 INFO L354 Elim1Store]: treesize reduction 594, result has 14.9 percent of original size [2021-11-09 09:35:29,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 5 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 472 treesize of output 526 [2021-11-09 09:35:30,052 INFO L354 Elim1Store]: treesize reduction 548, result has 15.8 percent of original size [2021-11-09 09:35:30,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 5 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 516 treesize of output 466 [2021-11-09 09:35:30,224 INFO L354 Elim1Store]: treesize reduction 752, result has 15.8 percent of original size [2021-11-09 09:35:30,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 5 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 571 treesize of output 641 [2021-11-09 09:35:33,389 INFO L354 Elim1Store]: treesize reduction 364, result has 39.6 percent of original size [2021-11-09 09:35:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 5 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 608 treesize of output 677 [2021-11-09 09:35:33,709 INFO L354 Elim1Store]: treesize reduction 526, result has 37.8 percent of original size [2021-11-09 09:35:33,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 5 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 886 treesize of output 1149 [2021-11-09 09:35:36,519 INFO L354 Elim1Store]: treesize reduction 1136, result has 17.1 percent of original size [2021-11-09 09:35:36,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 18 new quantified variables, introduced 77 case distinctions, treesize of input 1799 treesize of output 1154 [2021-11-09 09:35:37,111 INFO L354 Elim1Store]: treesize reduction 1458, result has 19.0 percent of original size [2021-11-09 09:35:37,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 77 case distinctions, treesize of input 2131 treesize of output 1658