./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73efddcda095c52d9900d13088d1ec70520de6007541f46343a568e878cf2ed4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:26:21,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:26:21,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:26:21,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:26:21,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:26:21,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:26:21,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:26:21,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:26:21,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:26:21,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:26:21,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:26:21,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:26:21,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:26:21,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:26:21,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:26:21,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:26:21,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:26:21,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:26:21,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:26:21,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:26:21,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:26:21,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:26:21,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:26:21,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:26:21,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:26:21,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:26:21,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:26:21,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:26:21,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:26:21,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:26:21,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:26:21,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:26:21,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:26:21,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:26:21,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:26:21,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:26:21,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:26:21,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:26:21,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:26:21,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:26:21,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:26:21,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:26:21,894 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:26:21,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:26:21,894 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:26:21,894 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:26:21,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:26:21,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:26:21,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:26:21,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:26:21,896 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:26:21,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:26:21,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:26:21,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:26:21,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:26:21,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:26:21,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:26:21,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:26:21,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:26:21,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:26:21,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:26:21,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:26:21,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:26:21,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:26:21,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:26:21,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:26:21,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:26:21,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:26:21,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:26:21,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:26:21,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:26:21,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:26:21,900 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:26:21,900 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:26:21,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:26:21,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:26:21,901 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_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73efddcda095c52d9900d13088d1ec70520de6007541f46343a568e878cf2ed4 [2021-12-06 23:26:22,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:26:22,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:26:22,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:26:22,103 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:26:22,103 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:26:22,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/pr3.c [2021-12-06 23:26:22,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/data/1c62b9eae/fd09fb2fda0c4832ac0e66ba72b53d5b/FLAG14f68d703 [2021-12-06 23:26:22,514 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:26:22,515 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/sv-benchmarks/c/array-tiling/pr3.c [2021-12-06 23:26:22,519 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/data/1c62b9eae/fd09fb2fda0c4832ac0e66ba72b53d5b/FLAG14f68d703 [2021-12-06 23:26:22,528 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/data/1c62b9eae/fd09fb2fda0c4832ac0e66ba72b53d5b [2021-12-06 23:26:22,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:26:22,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:26:22,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:26:22,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:26:22,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:26:22,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7de9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22, skipping insertion in model container [2021-12-06 23:26:22,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:26:22,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:26:22,678 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/sv-benchmarks/c/array-tiling/pr3.c[394,407] [2021-12-06 23:26:22,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:26:22,703 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:26:22,713 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/sv-benchmarks/c/array-tiling/pr3.c[394,407] [2021-12-06 23:26:22,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:26:22,732 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:26:22,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22 WrapperNode [2021-12-06 23:26:22,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:26:22,734 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:26:22,734 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:26:22,734 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:26:22,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,768 INFO L137 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-12-06 23:26:22,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:26:22,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:26:22,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:26:22,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:26:22,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:26:22,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:26:22,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:26:22,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:26:22,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (1/1) ... [2021-12-06 23:26:22,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:26:22,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:22,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:26:22,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:26:22,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:26:22,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:26:22,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:26:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:26:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:26:22,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:26:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:26:22,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:26:22,925 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:26:22,927 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:26:23,035 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:26:23,040 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:26:23,040 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:26:23,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:26:23 BoogieIcfgContainer [2021-12-06 23:26:23,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:26:23,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:26:23,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:26:23,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:26:23,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:26:22" (1/3) ... [2021-12-06 23:26:23,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ca6cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:26:23, skipping insertion in model container [2021-12-06 23:26:23,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:26:22" (2/3) ... [2021-12-06 23:26:23,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65ca6cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:26:23, skipping insertion in model container [2021-12-06 23:26:23,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:26:23" (3/3) ... [2021-12-06 23:26:23,049 INFO L111 eAbstractionObserver]: Analyzing ICFG pr3.c [2021-12-06 23:26:23,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:26:23,054 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:26:23,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:26:23,100 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:26:23,100 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:26:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:26:23,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:23,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:23,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash -405965127, now seen corresponding path program 1 times [2021-12-06 23:26:23,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:23,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880476623] [2021-12-06 23:26:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:23,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:23,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:23,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880476623] [2021-12-06 23:26:23,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880476623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:23,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:23,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:26:23,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780107529] [2021-12-06 23:26:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:23,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:26:23,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:26:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:26:23,278 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:23,294 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-12-06 23:26:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:26:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 23:26:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:23,301 INFO L225 Difference]: With dead ends: 45 [2021-12-06 23:26:23,302 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 23:26:23,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:26:23,306 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:23,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 23:26:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-06 23:26:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-12-06 23:26:23,330 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 13 [2021-12-06 23:26:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:23,330 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-12-06 23:26:23,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-12-06 23:26:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:26:23,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:23,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:23,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:26:23,331 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:23,332 INFO L85 PathProgramCache]: Analyzing trace with hash 274093243, now seen corresponding path program 1 times [2021-12-06 23:26:23,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:23,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154957981] [2021-12-06 23:26:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:23,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:23,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:23,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154957981] [2021-12-06 23:26:23,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154957981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:23,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:23,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:26:23,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634745622] [2021-12-06 23:26:23,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:23,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:26:23,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:23,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:26:23,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:26:23,395 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:23,422 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-06 23:26:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:26:23,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 23:26:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:23,423 INFO L225 Difference]: With dead ends: 29 [2021-12-06 23:26:23,424 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 23:26:23,424 INFO L932 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 [2021-12-06 23:26:23,425 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:23,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 65 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 23:26:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-12-06 23:26:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-12-06 23:26:23,430 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2021-12-06 23:26:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:23,430 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-12-06 23:26:23,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-12-06 23:26:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:26:23,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:23,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:23,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:26:23,431 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:23,432 INFO L85 PathProgramCache]: Analyzing trace with hash 274152825, now seen corresponding path program 1 times [2021-12-06 23:26:23,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:23,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827326714] [2021-12-06 23:26:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:23,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:23,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:23,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827326714] [2021-12-06 23:26:23,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827326714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:23,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:23,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:26:23,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302207615] [2021-12-06 23:26:23,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:23,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:26:23,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:26:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:23,545 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:23,585 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-12-06 23:26:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:26:23,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 23:26:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:23,586 INFO L225 Difference]: With dead ends: 38 [2021-12-06 23:26:23,586 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 23:26:23,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:23,588 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:23,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 23:26:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-12-06 23:26:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-06 23:26:23,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2021-12-06 23:26:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:23,592 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-06 23:26:23,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-06 23:26:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 23:26:23,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:23,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:23,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 23:26:23,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash 40395978, now seen corresponding path program 1 times [2021-12-06 23:26:23,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:23,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993406947] [2021-12-06 23:26:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:23,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:23,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:23,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993406947] [2021-12-06 23:26:23,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993406947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:23,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775364416] [2021-12-06 23:26:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:23,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:23,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:23,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:23,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:26:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 23:26:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:23,947 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 [2021-12-06 23:26:23,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:26:23,972 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 29 treesize of output 28 [2021-12-06 23:26:23,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:26:23,988 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 [2021-12-06 23:26:24,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 23:26:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:24,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 23:26:24,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 23:26:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:24,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775364416] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:24,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:24,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2021-12-06 23:26:24,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699755470] [2021-12-06 23:26:24,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:24,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:26:24,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:24,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:26:24,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:26:24,158 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:24,591 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2021-12-06 23:26:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:26:24,592 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 23:26:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:24,594 INFO L225 Difference]: With dead ends: 112 [2021-12-06 23:26:24,594 INFO L226 Difference]: Without dead ends: 102 [2021-12-06 23:26:24,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:26:24,596 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 240 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:24,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 114 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:26:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-06 23:26:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 31. [2021-12-06 23:26:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-06 23:26:24,603 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 18 [2021-12-06 23:26:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:24,603 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-06 23:26:24,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-06 23:26:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 23:26:24,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:24,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:24,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:26:24,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:24,806 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 741460556, now seen corresponding path program 1 times [2021-12-06 23:26:24,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:24,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605490267] [2021-12-06 23:26:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:24,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:24,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605490267] [2021-12-06 23:26:24,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605490267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:24,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:24,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:26:24,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293926971] [2021-12-06 23:26:24,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:24,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:26:24,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:26:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:26:24,979 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:25,010 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-12-06 23:26:25,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:26:25,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 23:26:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:25,011 INFO L225 Difference]: With dead ends: 57 [2021-12-06 23:26:25,011 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 23:26:25,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:25,013 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:25,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 23:26:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2021-12-06 23:26:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-06 23:26:25,020 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-06 23:26:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:25,020 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-06 23:26:25,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-06 23:26:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 23:26:25,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:25,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:25,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 23:26:25,022 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1421518926, now seen corresponding path program 1 times [2021-12-06 23:26:25,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603216155] [2021-12-06 23:26:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:25,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:25,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603216155] [2021-12-06 23:26:25,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603216155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:25,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:25,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:26:25,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994163477] [2021-12-06 23:26:25,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:25,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:26:25,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:26:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:26:25,072 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:25,092 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-12-06 23:26:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:26:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 23:26:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:25,093 INFO L225 Difference]: With dead ends: 57 [2021-12-06 23:26:25,093 INFO L226 Difference]: Without dead ends: 41 [2021-12-06 23:26:25,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:25,094 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:25,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-06 23:26:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2021-12-06 23:26:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-12-06 23:26:25,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2021-12-06 23:26:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:25,099 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-12-06 23:26:25,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-12-06 23:26:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 23:26:25,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:25,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:25,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 23:26:25,100 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1028491916, now seen corresponding path program 1 times [2021-12-06 23:26:25,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763624298] [2021-12-06 23:26:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:25,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:25,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:25,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763624298] [2021-12-06 23:26:25,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763624298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:25,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026860845] [2021-12-06 23:26:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:25,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:25,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:25,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:25,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:26:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:25,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:26:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:25,263 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 [2021-12-06 23:26:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:26:25,279 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 29 treesize of output 28 [2021-12-06 23:26:25,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:26:25,296 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 40 treesize of output 39 [2021-12-06 23:26:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:25,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:25,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-06 23:26:25,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 23:26:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026860845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:25,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:25,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2021-12-06 23:26:25,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369956411] [2021-12-06 23:26:25,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:25,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:26:25,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:26:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:26:25,447 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:25,693 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2021-12-06 23:26:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 23:26:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 23:26:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:25,695 INFO L225 Difference]: With dead ends: 94 [2021-12-06 23:26:25,695 INFO L226 Difference]: Without dead ends: 92 [2021-12-06 23:26:25,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-12-06 23:26:25,696 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:25,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 118 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:26:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-06 23:26:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2021-12-06 23:26:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-06 23:26:25,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2021-12-06 23:26:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:25,702 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-06 23:26:25,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-06 23:26:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 23:26:25,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:25,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:25,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:26:25,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 23:26:25,905 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash 85282267, now seen corresponding path program 1 times [2021-12-06 23:26:25,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616116869] [2021-12-06 23:26:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:25,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:25,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:25,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616116869] [2021-12-06 23:26:25,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616116869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:25,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:25,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:26:25,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099394824] [2021-12-06 23:26:25,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:25,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:26:25,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:25,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:26:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:25,965 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:25,975 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2021-12-06 23:26:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:26:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 23:26:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:25,977 INFO L225 Difference]: With dead ends: 66 [2021-12-06 23:26:25,977 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 23:26:25,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:25,978 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:25,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 23:26:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-12-06 23:26:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-12-06 23:26:25,982 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2021-12-06 23:26:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:25,982 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-12-06 23:26:25,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-12-06 23:26:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 23:26:25,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:25,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:25,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 23:26:25,983 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:25,984 INFO L85 PathProgramCache]: Analyzing trace with hash 367135703, now seen corresponding path program 1 times [2021-12-06 23:26:25,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:25,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542580519] [2021-12-06 23:26:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:25,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:26,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:26,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542580519] [2021-12-06 23:26:26,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542580519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:26,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:26,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:26:26,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422153648] [2021-12-06 23:26:26,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:26,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:26:26,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:26:26,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:26,005 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:26,015 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-12-06 23:26:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:26:26,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 23:26:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:26,016 INFO L225 Difference]: With dead ends: 60 [2021-12-06 23:26:26,016 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 23:26:26,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:26,017 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:26,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 23:26:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-12-06 23:26:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-06 23:26:26,021 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2021-12-06 23:26:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:26,021 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-06 23:26:26,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-06 23:26:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:26:26,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:26,022 INFO L514 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] [2021-12-06 23:26:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 23:26:26,022 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:26,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:26,022 INFO L85 PathProgramCache]: Analyzing trace with hash -340290083, now seen corresponding path program 1 times [2021-12-06 23:26:26,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398321381] [2021-12-06 23:26:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:26,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:26,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:26,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398321381] [2021-12-06 23:26:26,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398321381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:26,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097681776] [2021-12-06 23:26:26,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:26,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:26,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:26,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:26,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:26:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 23:26:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:26,247 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 [2021-12-06 23:26:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:26:26,267 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 [2021-12-06 23:26:26,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 23:26:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:26,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:26,433 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 17 treesize of output 15 [2021-12-06 23:26:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:26:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:26,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097681776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:26,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:26,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2021-12-06 23:26:26,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338443640] [2021-12-06 23:26:26,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:26,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:26:26,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:26,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:26:26,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:26:26,450 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:26,801 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2021-12-06 23:26:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 23:26:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 23:26:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:26,802 INFO L225 Difference]: With dead ends: 121 [2021-12-06 23:26:26,802 INFO L226 Difference]: Without dead ends: 111 [2021-12-06 23:26:26,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 23:26:26,804 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 162 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:26,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 128 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:26:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-06 23:26:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 46. [2021-12-06 23:26:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-06 23:26:26,808 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 24 [2021-12-06 23:26:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:26,809 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-06 23:26:26,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-06 23:26:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:26:26,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:26,810 INFO L514 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] [2021-12-06 23:26:26,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:26:27,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:26:27,011 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1361358437, now seen corresponding path program 1 times [2021-12-06 23:26:27,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:27,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597492551] [2021-12-06 23:26:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:27,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:26:27,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:27,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597492551] [2021-12-06 23:26:27,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597492551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:27,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:27,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:26:27,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244923853] [2021-12-06 23:26:27,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:27,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:26:27,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:26:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:26:27,076 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:27,094 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-12-06 23:26:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:26:27,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 23:26:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:27,095 INFO L225 Difference]: With dead ends: 77 [2021-12-06 23:26:27,095 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 23:26:27,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:26:27,097 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:27,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 23:26:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-12-06 23:26:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-06 23:26:27,103 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 24 [2021-12-06 23:26:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:27,103 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-06 23:26:27,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-06 23:26:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 23:26:27,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:27,104 INFO L514 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] [2021-12-06 23:26:27,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 23:26:27,104 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:27,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1653745181, now seen corresponding path program 1 times [2021-12-06 23:26:27,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:27,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361696273] [2021-12-06 23:26:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:27,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:27,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361696273] [2021-12-06 23:26:27,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361696273] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870436726] [2021-12-06 23:26:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:27,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:27,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:27,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:27,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:26:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:26:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:27,261 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 [2021-12-06 23:26:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:26:27,274 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 40 treesize of output 39 [2021-12-06 23:26:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:27,387 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 17 treesize of output 15 [2021-12-06 23:26:27,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:26:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:27,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870436726] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:27,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:27,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 15 [2021-12-06 23:26:27,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424921150] [2021-12-06 23:26:27,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:27,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 23:26:27,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:27,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 23:26:27,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:26:27,403 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:27,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:27,697 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-12-06 23:26:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 23:26:27,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 23:26:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:27,698 INFO L225 Difference]: With dead ends: 128 [2021-12-06 23:26:27,698 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 23:26:27,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 23:26:27,700 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:27,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 140 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:26:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 23:26:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 61. [2021-12-06 23:26:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-06 23:26:27,707 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 24 [2021-12-06 23:26:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:27,708 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-06 23:26:27,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-06 23:26:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:26:27,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:27,709 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:27,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:26:27,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:26:27,910 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:27,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1421348308, now seen corresponding path program 1 times [2021-12-06 23:26:27,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:27,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640809106] [2021-12-06 23:26:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:27,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:26:27,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640809106] [2021-12-06 23:26:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640809106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:27,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:27,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:26:27,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141953120] [2021-12-06 23:26:27,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:27,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:26:27,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:26:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:27,970 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:28,028 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-12-06 23:26:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:26:28,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 23:26:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:28,032 INFO L225 Difference]: With dead ends: 83 [2021-12-06 23:26:28,032 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 23:26:28,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:28,035 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:28,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 23:26:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-12-06 23:26:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-12-06 23:26:28,047 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 29 [2021-12-06 23:26:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:28,047 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-12-06 23:26:28,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-12-06 23:26:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:26:28,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:28,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:28,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 23:26:28,049 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1546939568, now seen corresponding path program 2 times [2021-12-06 23:26:28,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:28,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740790974] [2021-12-06 23:26:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:28,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:28,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740790974] [2021-12-06 23:26:28,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740790974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283111333] [2021-12-06 23:26:28,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:26:28,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:28,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:28,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:28,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:26:28,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:26:28,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:26:28,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 23:26:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:28,212 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 [2021-12-06 23:26:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:28,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:28,490 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 35 treesize of output 31 [2021-12-06 23:26:28,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-12-06 23:26:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:28,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283111333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:28,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:28,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2021-12-06 23:26:28,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275682340] [2021-12-06 23:26:28,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:28,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:26:28,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:28,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:26:28,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:26:28,512 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:29,359 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-12-06 23:26:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 23:26:29,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 23:26:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:29,360 INFO L225 Difference]: With dead ends: 197 [2021-12-06 23:26:29,360 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 23:26:29,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=592, Invalid=3190, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 23:26:29,362 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 350 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:29,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 106 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:26:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 23:26:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 82. [2021-12-06 23:26:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 81 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2021-12-06 23:26:29,369 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 30 [2021-12-06 23:26:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:29,369 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2021-12-06 23:26:29,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2021-12-06 23:26:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 23:26:29,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:29,370 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:29,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:26:29,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:26:29,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:29,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1896113853, now seen corresponding path program 3 times [2021-12-06 23:26:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:29,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374644485] [2021-12-06 23:26:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:29,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:29,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374644485] [2021-12-06 23:26:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374644485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530936608] [2021-12-06 23:26:29,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:26:29,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:29,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:29,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:26:29,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 23:26:29,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:26:29,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:26:29,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:30,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:30,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530936608] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:30,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:30,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2021-12-06 23:26:30,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304444528] [2021-12-06 23:26:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:30,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 23:26:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 23:26:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:26:30,197 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:30,353 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2021-12-06 23:26:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:26:30,353 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 23:26:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:30,354 INFO L225 Difference]: With dead ends: 166 [2021-12-06 23:26:30,354 INFO L226 Difference]: Without dead ends: 109 [2021-12-06 23:26:30,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 23:26:30,355 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 189 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:30,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 129 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:26:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-06 23:26:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2021-12-06 23:26:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.141304347826087) internal successors, (105), 92 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2021-12-06 23:26:30,362 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 36 [2021-12-06 23:26:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:30,362 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2021-12-06 23:26:30,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2021-12-06 23:26:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:26:30,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:30,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:30,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:26:30,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:30,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash -754137390, now seen corresponding path program 4 times [2021-12-06 23:26:30,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:30,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030568265] [2021-12-06 23:26:30,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:30,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:30,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030568265] [2021-12-06 23:26:30,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030568265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:30,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826691180] [2021-12-06 23:26:30,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:26:30,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:30,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:30,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:30,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:26:30,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:26:30,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:26:30,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 23:26:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:30,990 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 [2021-12-06 23:26:31,015 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:31,015 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 29 treesize of output 28 [2021-12-06 23:26:31,025 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 23:26:31,026 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 23 treesize of output 22 [2021-12-06 23:26:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:31,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:31,487 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 35 treesize of output 31 [2021-12-06 23:26:31,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-12-06 23:26:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:31,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826691180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:31,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:31,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 35 [2021-12-06 23:26:31,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406510734] [2021-12-06 23:26:31,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:31,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 23:26:31,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 23:26:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 23:26:31,650 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:34,036 INFO L93 Difference]: Finished difference Result 285 states and 326 transitions. [2021-12-06 23:26:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-06 23:26:34,036 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 23:26:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:34,038 INFO L225 Difference]: With dead ends: 285 [2021-12-06 23:26:34,038 INFO L226 Difference]: Without dead ends: 275 [2021-12-06 23:26:34,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1192, Invalid=8314, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 23:26:34,041 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 322 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:34,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 327 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:26:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-06 23:26:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 103. [2021-12-06 23:26:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-12-06 23:26:34,049 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 41 [2021-12-06 23:26:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:34,049 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-12-06 23:26:34,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-12-06 23:26:34,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:26:34,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:34,050 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:34,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 23:26:34,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:34,252 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash 4210706, now seen corresponding path program 1 times [2021-12-06 23:26:34,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264502283] [2021-12-06 23:26:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:34,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:34,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:34,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264502283] [2021-12-06 23:26:34,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264502283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:34,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858677388] [2021-12-06 23:26:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:34,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:34,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:34,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:34,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:26:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:26:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:34,513 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 [2021-12-06 23:26:34,529 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:34,529 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 29 treesize of output 28 [2021-12-06 23:26:34,538 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 23:26:34,538 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 23 treesize of output 22 [2021-12-06 23:26:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:34,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:34,723 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 17 treesize of output 15 [2021-12-06 23:26:34,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:26:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:34,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858677388] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:34,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:34,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-06 23:26:34,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632772074] [2021-12-06 23:26:34,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:34,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:26:34,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:26:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:26:34,739 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:35,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:35,498 INFO L93 Difference]: Finished difference Result 248 states and 280 transitions. [2021-12-06 23:26:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 23:26:35,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 23:26:35,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:35,500 INFO L225 Difference]: With dead ends: 248 [2021-12-06 23:26:35,500 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 23:26:35,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=642, Invalid=3780, Unknown=0, NotChecked=0, Total=4422 [2021-12-06 23:26:35,502 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 178 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:35,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 270 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:26:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 23:26:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 105. [2021-12-06 23:26:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 104 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2021-12-06 23:26:35,510 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 41 [2021-12-06 23:26:35,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:35,510 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2021-12-06 23:26:35,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:35,510 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2021-12-06 23:26:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 23:26:35,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:35,511 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:35,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:26:35,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:26:35,712 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:35,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2067550693, now seen corresponding path program 5 times [2021-12-06 23:26:35,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:35,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295036189] [2021-12-06 23:26:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:35,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:35,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:35,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295036189] [2021-12-06 23:26:35,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295036189] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:35,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310371945] [2021-12-06 23:26:35,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:26:35,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:35,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:35,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:26:35,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-06 23:26:35,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:26:35,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 23:26:35,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:36,014 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 [2021-12-06 23:26:36,044 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:36,045 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 29 treesize of output 28 [2021-12-06 23:26:36,070 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 23:26:36,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 23:26:36,082 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 23:26:36,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 23:26:36,108 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-12-06 23:26:36,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-12-06 23:26:36,330 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 23:26:36,330 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 34 treesize of output 10 [2021-12-06 23:26:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:36,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:36,962 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 47 treesize of output 43 [2021-12-06 23:26:36,969 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 23:26:36,969 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 818 treesize of output 754 [2021-12-06 23:26:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:37,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310371945] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:37,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:37,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2021-12-06 23:26:37,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628600156] [2021-12-06 23:26:37,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:37,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 23:26:37,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:37,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 23:26:37,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:26:37,085 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:40,329 INFO L93 Difference]: Finished difference Result 264 states and 291 transitions. [2021-12-06 23:26:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 23:26:40,330 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 23:26:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:40,331 INFO L225 Difference]: With dead ends: 264 [2021-12-06 23:26:40,331 INFO L226 Difference]: Without dead ends: 254 [2021-12-06 23:26:40,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=521, Invalid=4591, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 23:26:40,333 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 293 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:40,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 316 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 631 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2021-12-06 23:26:40,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-06 23:26:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 153. [2021-12-06 23:26:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.144736842105263) internal successors, (174), 152 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2021-12-06 23:26:40,344 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 47 [2021-12-06 23:26:40,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:40,344 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2021-12-06 23:26:40,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:40,345 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2021-12-06 23:26:40,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 23:26:40,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:40,345 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:40,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:26:40,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:26:40,546 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:40,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1171421669, now seen corresponding path program 2 times [2021-12-06 23:26:40,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:40,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393358155] [2021-12-06 23:26:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:40,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:40,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393358155] [2021-12-06 23:26:40,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393358155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818323855] [2021-12-06 23:26:40,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:26:40,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:40,650 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:40,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:26:40,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:26:40,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:26:40,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 23:26:40,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:40,714 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 [2021-12-06 23:26:40,726 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:40,727 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 29 treesize of output 28 [2021-12-06 23:26:40,870 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 23:26:40,870 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-06 23:26:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:40,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:26:40,949 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 17 treesize of output 15 [2021-12-06 23:26:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:26:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:40,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818323855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:26:40,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:26:40,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2021-12-06 23:26:40,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700503777] [2021-12-06 23:26:40,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:26:40,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:26:40,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:26:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:26:40,971 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:42,068 INFO L93 Difference]: Finished difference Result 370 states and 420 transitions. [2021-12-06 23:26:42,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 23:26:42,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 23:26:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:42,070 INFO L225 Difference]: With dead ends: 370 [2021-12-06 23:26:42,070 INFO L226 Difference]: Without dead ends: 368 [2021-12-06 23:26:42,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=814, Invalid=6326, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 23:26:42,073 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 202 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:42,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 317 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:26:42,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-06 23:26:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 159. [2021-12-06 23:26:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 158 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2021-12-06 23:26:42,089 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 47 [2021-12-06 23:26:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:42,089 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2021-12-06 23:26:42,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2021-12-06 23:26:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 23:26:42,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:42,090 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:42,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:26:42,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:42,292 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash -973046858, now seen corresponding path program 1 times [2021-12-06 23:26:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:42,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815215352] [2021-12-06 23:26:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:42,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-06 23:26:42,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:42,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815215352] [2021-12-06 23:26:42,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815215352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:26:42,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:26:42,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:26:42,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692059436] [2021-12-06 23:26:42,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:26:42,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:26:42,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:26:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:26:42,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:42,326 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:26:42,352 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2021-12-06 23:26:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:26:42,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 23:26:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:26:42,354 INFO L225 Difference]: With dead ends: 240 [2021-12-06 23:26:42,354 INFO L226 Difference]: Without dead ends: 170 [2021-12-06 23:26:42,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:26:42,355 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:26:42,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:26:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-06 23:26:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2021-12-06 23:26:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 153 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2021-12-06 23:26:42,369 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 52 [2021-12-06 23:26:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:26:42,369 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2021-12-06 23:26:42,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:26:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2021-12-06 23:26:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 23:26:42,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:26:42,370 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:26:42,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 23:26:42,370 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:26:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:26:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1045433416, now seen corresponding path program 1 times [2021-12-06 23:26:42,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:26:42,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979926644] [2021-12-06 23:26:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:42,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:26:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:42,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:26:42,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979926644] [2021-12-06 23:26:42,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979926644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:26:42,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549524059] [2021-12-06 23:26:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:26:42,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:26:42,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:26:42,520 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:26:42,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:26:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:26:42,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 23:26:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:26:42,597 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 [2021-12-06 23:26:42,621 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:42,621 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 29 treesize of output 28 [2021-12-06 23:26:42,666 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:42,667 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 29 treesize of output 28 [2021-12-06 23:26:42,688 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:42,688 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 29 treesize of output 28 [2021-12-06 23:26:42,709 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:26:42,709 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 29 treesize of output 28 [2021-12-06 23:26:42,870 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 23:26:42,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-12-06 23:26:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:26:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:12,158 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 25 treesize of output 23 [2021-12-06 23:27:12,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 192 [2021-12-06 23:27:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:12,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549524059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:12,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:12,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 22 [2021-12-06 23:27:12,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560545660] [2021-12-06 23:27:12,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:27:12,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:27:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=376, Unknown=12, NotChecked=0, Total=462 [2021-12-06 23:27:12,233 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:16,592 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_114| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_114| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_395 Int)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_114| 12) (- 8)) v_ArrVal_395) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 16)))))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12 .cse1))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 16 .cse1))))) is different from false [2021-12-06 23:27:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:22,833 INFO L93 Difference]: Finished difference Result 267 states and 293 transitions. [2021-12-06 23:27:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 23:27:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-06 23:27:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:22,835 INFO L225 Difference]: With dead ends: 267 [2021-12-06 23:27:22,835 INFO L226 Difference]: Without dead ends: 257 [2021-12-06 23:27:22,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=291, Invalid=1676, Unknown=17, NotChecked=86, Total=2070 [2021-12-06 23:27:22,836 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 134 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:22,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 237 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 490 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2021-12-06 23:27:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-06 23:27:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 129. [2021-12-06 23:27:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.125) internal successors, (144), 128 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2021-12-06 23:27:22,847 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 52 [2021-12-06 23:27:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:22,848 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2021-12-06 23:27:22,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2021-12-06 23:27:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 23:27:22,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:22,848 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:22,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 23:27:23,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 23:27:23,050 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:23,051 INFO L85 PathProgramCache]: Analyzing trace with hash -210894152, now seen corresponding path program 6 times [2021-12-06 23:27:23,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:23,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383590452] [2021-12-06 23:27:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:23,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:23,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383590452] [2021-12-06 23:27:23,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383590452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:23,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944836500] [2021-12-06 23:27:23,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:27:23,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:23,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:23,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:23,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:27:23,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 23:27:23,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 23:27:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:23,342 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 [2021-12-06 23:27:23,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:27:23,389 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 29 treesize of output 28 [2021-12-06 23:27:23,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:27:23,397 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 29 treesize of output 28 [2021-12-06 23:27:23,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:27:23,404 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 [2021-12-06 23:27:23,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:27:23,793 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 29 treesize of output 13 [2021-12-06 23:27:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:23,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:24,134 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 47 treesize of output 43 [2021-12-06 23:27:24,138 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 23:27:24,138 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 335 treesize of output 303 [2021-12-06 23:27:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:24,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944836500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:24,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2021-12-06 23:27:24,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529598205] [2021-12-06 23:27:24,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:24,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 23:27:24,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 23:27:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 23:27:24,181 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:25,900 INFO L93 Difference]: Finished difference Result 263 states and 287 transitions. [2021-12-06 23:27:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-06 23:27:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 23:27:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:25,901 INFO L225 Difference]: With dead ends: 263 [2021-12-06 23:27:25,901 INFO L226 Difference]: Without dead ends: 253 [2021-12-06 23:27:25,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=901, Invalid=5419, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 23:27:25,903 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 577 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:25,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 379 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 23:27:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-06 23:27:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 135. [2021-12-06 23:27:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 134 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-12-06 23:27:25,915 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 53 [2021-12-06 23:27:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:25,915 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-12-06 23:27:25,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-12-06 23:27:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 23:27:25,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:25,916 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:25,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:27:26,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:26,118 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:26,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:26,119 INFO L85 PathProgramCache]: Analyzing trace with hash 189318136, now seen corresponding path program 2 times [2021-12-06 23:27:26,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:26,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632396101] [2021-12-06 23:27:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:26,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:26,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:26,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632396101] [2021-12-06 23:27:26,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632396101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:26,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803099983] [2021-12-06 23:27:26,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:27:26,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:26,257 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:26,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:27:26,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:27:26,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:26,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 23:27:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:26,333 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 [2021-12-06 23:27:26,540 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 23:27:26,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-06 23:27:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:26,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:26,640 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 17 treesize of output 15 [2021-12-06 23:27:26,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:27:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:26,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803099983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:26,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:26,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2021-12-06 23:27:26,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734338619] [2021-12-06 23:27:26,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:26,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:27:26,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:26,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:27:26,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:27:26,664 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:28,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:28,452 INFO L93 Difference]: Finished difference Result 448 states and 505 transitions. [2021-12-06 23:27:28,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-06 23:27:28,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 23:27:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:28,454 INFO L225 Difference]: With dead ends: 448 [2021-12-06 23:27:28,454 INFO L226 Difference]: Without dead ends: 446 [2021-12-06 23:27:28,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1467, Invalid=13785, Unknown=0, NotChecked=0, Total=15252 [2021-12-06 23:27:28,458 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 318 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:28,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 480 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:27:28,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-06 23:27:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 147. [2021-12-06 23:27:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1164383561643836) internal successors, (163), 146 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2021-12-06 23:27:28,471 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 53 [2021-12-06 23:27:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:28,472 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2021-12-06 23:27:28,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2021-12-06 23:27:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 23:27:28,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:28,472 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:28,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:27:28,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:28,674 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1520531125, now seen corresponding path program 7 times [2021-12-06 23:27:28,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:28,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357944708] [2021-12-06 23:27:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:28,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:28,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357944708] [2021-12-06 23:27:28,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357944708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740057279] [2021-12-06 23:27:28,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:27:28,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:28,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:28,936 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:28,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:27:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:28,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 23:27:28,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 114 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:29,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 114 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:29,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740057279] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:29,603 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:29,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2021-12-06 23:27:29,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552960258] [2021-12-06 23:27:29,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:29,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 23:27:29,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:29,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 23:27:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 23:27:29,605 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand has 39 states, 39 states have (on average 4.205128205128205) internal successors, (164), 39 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:29,897 INFO L93 Difference]: Finished difference Result 294 states and 323 transitions. [2021-12-06 23:27:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 23:27:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.205128205128205) internal successors, (164), 39 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-06 23:27:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:29,899 INFO L225 Difference]: With dead ends: 294 [2021-12-06 23:27:29,899 INFO L226 Difference]: Without dead ends: 183 [2021-12-06 23:27:29,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1546, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 23:27:29,900 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 296 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:29,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 276 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:27:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-06 23:27:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2021-12-06 23:27:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1024096385542168) internal successors, (183), 166 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 183 transitions. [2021-12-06 23:27:29,914 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 183 transitions. Word has length 59 [2021-12-06 23:27:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:29,915 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 183 transitions. [2021-12-06 23:27:29,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.205128205128205) internal successors, (164), 39 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 183 transitions. [2021-12-06 23:27:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 23:27:29,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:29,915 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:29,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:27:30,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 23:27:30,117 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1764330204, now seen corresponding path program 8 times [2021-12-06 23:27:30,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:30,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623217674] [2021-12-06 23:27:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:30,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:30,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:30,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623217674] [2021-12-06 23:27:30,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623217674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:30,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688765756] [2021-12-06 23:27:30,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:27:30,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:30,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:30,371 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:30,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:27:30,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:27:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 23:27:30,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:30,559 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 [2021-12-06 23:27:30,591 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:27:30,591 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 29 treesize of output 28 [2021-12-06 23:27:30,602 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 23:27:30,602 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 23 treesize of output 22 [2021-12-06 23:27:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:30,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:31,347 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 35 treesize of output 31 [2021-12-06 23:27:31,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-12-06 23:27:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:31,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688765756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:31,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:31,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18] total 47 [2021-12-06 23:27:31,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281523070] [2021-12-06 23:27:31,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:31,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 23:27:31,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 23:27:31,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1993, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 23:27:31,627 INFO L87 Difference]: Start difference. First operand 167 states and 183 transitions. Second operand has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:36,883 INFO L93 Difference]: Finished difference Result 542 states and 600 transitions. [2021-12-06 23:27:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-12-06 23:27:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 23:27:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:36,885 INFO L225 Difference]: With dead ends: 542 [2021-12-06 23:27:36,885 INFO L226 Difference]: Without dead ends: 532 [2021-12-06 23:27:36,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9139 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2859, Invalid=25871, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 23:27:36,887 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 613 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 2162 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:36,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 453 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2162 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 23:27:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-06 23:27:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 177. [2021-12-06 23:27:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 176 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 193 transitions. [2021-12-06 23:27:36,904 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 193 transitions. Word has length 64 [2021-12-06 23:27:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:36,905 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 193 transitions. [2021-12-06 23:27:36,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 193 transitions. [2021-12-06 23:27:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 23:27:36,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:36,905 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:36,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:27:37,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:37,106 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1655084638, now seen corresponding path program 2 times [2021-12-06 23:27:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541190375] [2021-12-06 23:27:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:37,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:37,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541190375] [2021-12-06 23:27:37,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541190375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127059600] [2021-12-06 23:27:37,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:27:37,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:37,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:37,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:37,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:27:37,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:27:37,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 23:27:37,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:37,335 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 [2021-12-06 23:27:37,349 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:27:37,350 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 29 treesize of output 28 [2021-12-06 23:27:37,361 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:27:37,361 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 29 treesize of output 28 [2021-12-06 23:27:37,566 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 23:27:37,567 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 42 treesize of output 20 [2021-12-06 23:27:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:37,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:37,689 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 17 treesize of output 15 [2021-12-06 23:27:37,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:27:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:37,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127059600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:37,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:37,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2021-12-06 23:27:37,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117027679] [2021-12-06 23:27:37,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:37,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 23:27:37,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:37,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 23:27:37,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:27:37,719 INFO L87 Difference]: Start difference. First operand 177 states and 193 transitions. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:39,752 INFO L93 Difference]: Finished difference Result 555 states and 623 transitions. [2021-12-06 23:27:39,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-12-06 23:27:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 23:27:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:39,754 INFO L225 Difference]: With dead ends: 555 [2021-12-06 23:27:39,754 INFO L226 Difference]: Without dead ends: 553 [2021-12-06 23:27:39,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 8 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7634 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1616, Invalid=18124, Unknown=0, NotChecked=0, Total=19740 [2021-12-06 23:27:39,756 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 491 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:39,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 352 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:27:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-12-06 23:27:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 179. [2021-12-06 23:27:39,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.101123595505618) internal successors, (196), 178 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 196 transitions. [2021-12-06 23:27:39,775 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 196 transitions. Word has length 64 [2021-12-06 23:27:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:39,775 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 196 transitions. [2021-12-06 23:27:39,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 196 transitions. [2021-12-06 23:27:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:27:39,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:39,776 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:39,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 23:27:39,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 23:27:39,977 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1655989871, now seen corresponding path program 9 times [2021-12-06 23:27:39,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:39,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290730837] [2021-12-06 23:27:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:39,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 14 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:40,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:40,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290730837] [2021-12-06 23:27:40,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290730837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:40,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825600466] [2021-12-06 23:27:40,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:27:40,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:40,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:40,214 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:40,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:27:40,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 23:27:40,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 23:27:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:40,478 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 [2021-12-06 23:27:40,504 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 23:27:40,504 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 23 treesize of output 22 [2021-12-06 23:27:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 14 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:40,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:41,109 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 25 treesize of output 23 [2021-12-06 23:27:41,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 192 [2021-12-06 23:27:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 14 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:41,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825600466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:41,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:41,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2021-12-06 23:27:41,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096179512] [2021-12-06 23:27:41,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:41,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:27:41,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:41,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:27:41,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2062, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:27:41,255 INFO L87 Difference]: Start difference. First operand 179 states and 196 transitions. Second operand has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:46,465 INFO L93 Difference]: Finished difference Result 469 states and 505 transitions. [2021-12-06 23:27:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-12-06 23:27:46,465 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:27:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:46,467 INFO L225 Difference]: With dead ends: 469 [2021-12-06 23:27:46,467 INFO L226 Difference]: Without dead ends: 459 [2021-12-06 23:27:46,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 121 SyntacticMatches, 34 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10320 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2588, Invalid=21904, Unknown=0, NotChecked=0, Total=24492 [2021-12-06 23:27:46,469 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 766 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 3014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:46,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 796 Invalid, 3014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2480 Invalid, 0 Unknown, 98 Unchecked, 1.2s Time] [2021-12-06 23:27:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-06 23:27:46,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 197. [2021-12-06 23:27:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1020408163265305) internal successors, (216), 196 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 216 transitions. [2021-12-06 23:27:46,489 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 216 transitions. Word has length 70 [2021-12-06 23:27:46,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:46,489 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 216 transitions. [2021-12-06 23:27:46,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:46,489 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 216 transitions. [2021-12-06 23:27:46,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:27:46,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:46,490 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:46,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:27:46,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 23:27:46,691 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:46,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:46,693 INFO L85 PathProgramCache]: Analyzing trace with hash 813215407, now seen corresponding path program 3 times [2021-12-06 23:27:46,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:46,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316727425] [2021-12-06 23:27:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:46,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:46,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:46,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316727425] [2021-12-06 23:27:46,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316727425] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:46,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732205893] [2021-12-06 23:27:46,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:27:46,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:46,868 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:46,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:27:47,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 23:27:47,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:47,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:27:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:47,041 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 [2021-12-06 23:27:47,053 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:27:47,053 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 29 treesize of output 28 [2021-12-06 23:27:47,629 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-12-06 23:27:47,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 23 [2021-12-06 23:27:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:47,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:47,742 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 17 treesize of output 15 [2021-12-06 23:27:47,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:27:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:47,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732205893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:47,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:47,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 28 [2021-12-06 23:27:47,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493403702] [2021-12-06 23:27:47,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:47,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 23:27:47,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:47,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 23:27:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-12-06 23:27:47,770 INFO L87 Difference]: Start difference. First operand 197 states and 216 transitions. Second operand has 28 states, 28 states have (on average 4.642857142857143) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:48,543 INFO L93 Difference]: Finished difference Result 358 states and 398 transitions. [2021-12-06 23:27:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 23:27:48,543 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.642857142857143) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:27:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:48,544 INFO L225 Difference]: With dead ends: 358 [2021-12-06 23:27:48,544 INFO L226 Difference]: Without dead ends: 356 [2021-12-06 23:27:48,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 140 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=460, Invalid=4232, Unknown=0, NotChecked=0, Total=4692 [2021-12-06 23:27:48,545 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 105 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:48,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 415 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 885 Invalid, 0 Unknown, 530 Unchecked, 0.3s Time] [2021-12-06 23:27:48,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-06 23:27:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 255. [2021-12-06 23:27:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1181102362204725) internal successors, (284), 254 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 284 transitions. [2021-12-06 23:27:48,572 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 284 transitions. Word has length 70 [2021-12-06 23:27:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:48,572 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 284 transitions. [2021-12-06 23:27:48,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.642857142857143) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 284 transitions. [2021-12-06 23:27:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:27:48,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:48,573 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:48,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 23:27:48,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 23:27:48,774 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash 420188397, now seen corresponding path program 4 times [2021-12-06 23:27:48,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:48,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947881770] [2021-12-06 23:27:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:48,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:48,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:48,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947881770] [2021-12-06 23:27:48,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947881770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:48,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207045788] [2021-12-06 23:27:48,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:27:48,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:48,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:48,954 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:48,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:27:49,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:27:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 23:27:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:49,047 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 [2021-12-06 23:27:49,058 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:27:49,058 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 29 treesize of output 28 [2021-12-06 23:27:49,332 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 23:27:49,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2021-12-06 23:27:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:49,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:49,448 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 17 treesize of output 15 [2021-12-06 23:27:49,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-06 23:27:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:49,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207045788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:49,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:49,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2021-12-06 23:27:49,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767322120] [2021-12-06 23:27:49,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 23:27:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:49,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 23:27:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:27:49,476 INFO L87 Difference]: Start difference. First operand 255 states and 284 transitions. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:27:53,421 INFO L93 Difference]: Finished difference Result 840 states and 948 transitions. [2021-12-06 23:27:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2021-12-06 23:27:53,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-06 23:27:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:27:53,424 INFO L225 Difference]: With dead ends: 840 [2021-12-06 23:27:53,424 INFO L226 Difference]: Without dead ends: 838 [2021-12-06 23:27:53,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 126 SyntacticMatches, 7 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24605 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3627, Invalid=53733, Unknown=0, NotChecked=0, Total=57360 [2021-12-06 23:27:53,426 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 583 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:27:53,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 671 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 2914 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 23:27:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-12-06 23:27:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 261. [2021-12-06 23:27:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.1192307692307693) internal successors, (291), 260 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 291 transitions. [2021-12-06 23:27:53,455 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 291 transitions. Word has length 70 [2021-12-06 23:27:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:27:53,456 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 291 transitions. [2021-12-06 23:27:53,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:27:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 291 transitions. [2021-12-06 23:27:53,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:27:53,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:27:53,457 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:27:53,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 23:27:53,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 23:27:53,658 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:27:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:27:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash -509409342, now seen corresponding path program 10 times [2021-12-06 23:27:53,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:27:53,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745693157] [2021-12-06 23:27:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:27:53,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:27:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:27:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 16 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:53,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:27:53,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745693157] [2021-12-06 23:27:53,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745693157] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:27:53,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790030167] [2021-12-06 23:27:53,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:27:53,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:27:53,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:27:53,904 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:27:53,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:27:53,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:27:53,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:27:53,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 23:27:53,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:27:54,042 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 [2021-12-06 23:27:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 16 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:54,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:27:54,769 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 35 treesize of output 31 [2021-12-06 23:27:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2021-12-06 23:27:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:27:54,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790030167] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:27:54,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:27:54,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 47 [2021-12-06 23:27:54,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803070579] [2021-12-06 23:27:54,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:27:54,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 23:27:54,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:27:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 23:27:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2000, Unknown=0, NotChecked=0, Total=2162 [2021-12-06 23:27:54,847 INFO L87 Difference]: Start difference. First operand 261 states and 291 transitions. Second operand has 47 states, 47 states have (on average 4.531914893617022) internal successors, (213), 47 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:03,469 INFO L93 Difference]: Finished difference Result 730 states and 801 transitions. [2021-12-06 23:28:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-12-06 23:28:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.531914893617022) internal successors, (213), 47 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-06 23:28:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:03,472 INFO L225 Difference]: With dead ends: 730 [2021-12-06 23:28:03,472 INFO L226 Difference]: Without dead ends: 720 [2021-12-06 23:28:03,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16221 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4090, Invalid=42782, Unknown=0, NotChecked=0, Total=46872 [2021-12-06 23:28:03,474 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 942 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 3445 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 4226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 3445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:03,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 600 Invalid, 4226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 3445 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 23:28:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-12-06 23:28:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 221. [2021-12-06 23:28:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1) internal successors, (242), 220 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:03,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 242 transitions. [2021-12-06 23:28:03,500 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 242 transitions. Word has length 76 [2021-12-06 23:28:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:03,500 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 242 transitions. [2021-12-06 23:28:03,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.531914893617022) internal successors, (213), 47 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 242 transitions. [2021-12-06 23:28:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 23:28:03,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:03,501 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:03,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 23:28:03,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:03,701 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash -403038507, now seen corresponding path program 11 times [2021-12-06 23:28:03,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:03,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355322220] [2021-12-06 23:28:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:03,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 203 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:04,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355322220] [2021-12-06 23:28:04,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355322220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758004014] [2021-12-06 23:28:04,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:28:04,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:04,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:04,017 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:04,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:28:04,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 23:28:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:28:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:28:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 252 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:04,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:28:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 252 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:05,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758004014] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:28:05,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:28:05,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2021-12-06 23:28:05,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916111484] [2021-12-06 23:28:05,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:28:05,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 23:28:05,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:28:05,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 23:28:05,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=1934, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 23:28:05,086 INFO L87 Difference]: Start difference. First operand 221 states and 242 transitions. Second operand has 51 states, 51 states have (on average 4.568627450980392) internal successors, (233), 51 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:05,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:05,423 INFO L93 Difference]: Finished difference Result 422 states and 461 transitions. [2021-12-06 23:28:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:28:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.568627450980392) internal successors, (233), 51 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 23:28:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:05,425 INFO L225 Difference]: With dead ends: 422 [2021-12-06 23:28:05,425 INFO L226 Difference]: Without dead ends: 257 [2021-12-06 23:28:05,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 23:28:05,426 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 363 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:05,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 320 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:28:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-06 23:28:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 241. [2021-12-06 23:28:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0916666666666666) internal successors, (262), 240 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 262 transitions. [2021-12-06 23:28:05,451 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 262 transitions. Word has length 82 [2021-12-06 23:28:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:05,452 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 262 transitions. [2021-12-06 23:28:05,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.568627450980392) internal successors, (233), 51 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 262 transitions. [2021-12-06 23:28:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 23:28:05,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:05,452 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:05,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 23:28:05,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:05,654 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:05,655 INFO L85 PathProgramCache]: Analyzing trace with hash -834672092, now seen corresponding path program 12 times [2021-12-06 23:28:05,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:05,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926388637] [2021-12-06 23:28:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:05,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 18 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:05,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926388637] [2021-12-06 23:28:05,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926388637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:05,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92772352] [2021-12-06 23:28:05,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:28:05,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:05,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:05,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:05,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 23:28:06,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 23:28:06,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:28:06,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 23:28:06,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:06,521 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 [2021-12-06 23:28:06,554 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 23:28:06,555 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 29 treesize of output 28 [2021-12-06 23:28:06,567 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 23:28:06,567 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 23 treesize of output 22 [2021-12-06 23:28:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 18 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:07,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:28:07,565 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 25 treesize of output 23 [2021-12-06 23:28:07,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2021-12-06 23:28:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 18 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:07,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92772352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:28:07,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:28:07,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 55 [2021-12-06 23:28:07,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341807638] [2021-12-06 23:28:07,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:28:07,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-06 23:28:07,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:28:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-06 23:28:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2761, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 23:28:07,752 INFO L87 Difference]: Start difference. First operand 241 states and 262 transitions. Second operand has 55 states, 55 states have (on average 4.418181818181818) internal successors, (243), 55 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:18,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:28:18,434 INFO L93 Difference]: Finished difference Result 699 states and 749 transitions. [2021-12-06 23:28:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-12-06 23:28:18,434 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.418181818181818) internal successors, (243), 55 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-06 23:28:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:28:18,436 INFO L225 Difference]: With dead ends: 699 [2021-12-06 23:28:18,436 INFO L226 Difference]: Without dead ends: 689 [2021-12-06 23:28:18,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 142 SyntacticMatches, 55 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20094 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3953, Invalid=40357, Unknown=0, NotChecked=0, Total=44310 [2021-12-06 23:28:18,438 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1146 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 3930 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 4734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 3930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:28:18,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1146 Valid, 1170 Invalid, 4734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 3930 Invalid, 0 Unknown, 155 Unchecked, 2.0s Time] [2021-12-06 23:28:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-12-06 23:28:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 309. [2021-12-06 23:28:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.103896103896104) internal successors, (340), 308 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 340 transitions. [2021-12-06 23:28:18,477 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 340 transitions. Word has length 87 [2021-12-06 23:28:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:28:18,477 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 340 transitions. [2021-12-06 23:28:18,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.418181818181818) internal successors, (243), 55 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:28:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 340 transitions. [2021-12-06 23:28:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 23:28:18,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:28:18,478 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:28:18,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 23:28:18,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:18,679 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:28:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:28:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash 24186020, now seen corresponding path program 3 times [2021-12-06 23:28:18,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:28:18,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325500688] [2021-12-06 23:28:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:28:18,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:28:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:28:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:28:18,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:28:18,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325500688] [2021-12-06 23:28:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325500688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:28:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552520608] [2021-12-06 23:28:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:28:18,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:28:18,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:28:18,893 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:28:18,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73f68105-faf0-41ff-b66b-fbf8c8901727/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 23:28:19,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 23:28:19,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:28:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 23:28:19,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:28:19,077 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 [2021-12-06 23:28:19,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,102 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 29 treesize of output 28 [2021-12-06 23:28:19,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,109 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 29 treesize of output 28 [2021-12-06 23:28:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,144 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 24 treesize of output 23 [2021-12-06 23:28:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,155 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 24 treesize of output 23 [2021-12-06 23:28:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,164 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 24 treesize of output 23 [2021-12-06 23:28:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,199 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 24 treesize of output 23 [2021-12-06 23:28:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,213 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 24 treesize of output 23 [2021-12-06 23:28:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,223 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 24 treesize of output 23 [2021-12-06 23:28:19,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,263 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 24 treesize of output 23 [2021-12-06 23:28:19,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:28:19,301 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 38 [2021-12-06 23:28:19,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:28:19,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 38 [2021-12-06 23:28:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:28:19,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:28:19,412 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 10 [2021-12-06 23:28:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-12-06 23:28:19,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:31:00,466 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 55 treesize of output 53 [2021-12-06 23:31:00,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3018732 treesize of output 3014636 [2021-12-06 23:31:09,445 WARN L227 SmtUtils]: Spent 8.96s on a formula simplification that was a NOOP. DAG size: 2084 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:31:57,399 WARN L227 SmtUtils]: Spent 30.68s on a formula simplification. DAG size of input: 2079 DAG size of output: 2079 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:32:29,120 WARN L227 SmtUtils]: Spent 12.18s on a formula simplification that was a NOOP. DAG size: 2069 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:33:18,472 WARN L227 SmtUtils]: Spent 29.70s on a formula simplification. DAG size of input: 2067 DAG size of output: 2067 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:34:17,451 WARN L227 SmtUtils]: Spent 40.33s on a formula simplification. DAG size of input: 2065 DAG size of output: 2065 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:35:19,898 WARN L227 SmtUtils]: Spent 44.77s on a formula simplification. DAG size of input: 2063 DAG size of output: 2063 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:35:59,493 WARN L227 SmtUtils]: Spent 14.65s on a formula simplification that was a NOOP. DAG size: 2016 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:37:00,233 WARN L227 SmtUtils]: Spent 33.00s on a formula simplification. DAG size of input: 1865 DAG size of output: 1865 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:37:37,716 WARN L227 SmtUtils]: Spent 21.09s on a formula simplification. DAG size of input: 1863 DAG size of output: 1863 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:38:09,981 WARN L227 SmtUtils]: Spent 10.52s on a formula simplification that was a NOOP. DAG size: 1816 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:38:31,914 WARN L227 SmtUtils]: Spent 6.99s on a formula simplification that was a NOOP. DAG size: 1665 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:39:00,475 WARN L227 SmtUtils]: Spent 15.04s on a formula simplification. DAG size of input: 1663 DAG size of output: 1663 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:39:42,683 WARN L227 SmtUtils]: Spent 22.96s on a formula simplification. DAG size of input: 1816 DAG size of output: 1816 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:40:33,497 WARN L227 SmtUtils]: Spent 31.70s on a formula simplification. DAG size of input: 1814 DAG size of output: 1814 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:41:05,675 WARN L227 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 836 DAG size of output: 836 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)