./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0232-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0232-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:20:36,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:20:36,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:20:36,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:20:36,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:20:36,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:20:36,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:20:36,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:20:36,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:20:36,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:20:36,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:20:36,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:20:36,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:20:36,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:20:36,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:20:36,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:20:36,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:20:36,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:20:36,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:20:36,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:20:36,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:20:36,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:20:36,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:20:36,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:20:36,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:20:36,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:20:36,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:20:36,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:20:36,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:20:36,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:20:36,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:20:36,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:20:36,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:20:36,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:20:36,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:20:36,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:20:36,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:20:36,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:20:36,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:20:36,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:20:36,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:20:36,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:20:36,908 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:20:36,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:20:36,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:20:36,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:20:36,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:20:36,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:20:36,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:20:36,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:20:36,922 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:20:36,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:20:36,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:20:36,924 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:20:36,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:20:36,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:20:36,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:20:36,925 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:20:36,925 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:20:36,926 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:20:36,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:20:36,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:20:36,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:20:36,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:20:36,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:20:36,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:20:36,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:20:36,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:20:36,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:20:36,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:20:36,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:20:36,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:20:36,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:20:36,931 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_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01db24b1589b54f78ea9acc56548e9023dc94ca9b67a9629bccf00110df292f7 [2021-11-20 06:20:37,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:20:37,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:20:37,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:20:37,314 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:20:37,315 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:20:37,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety/test-0232-3.i [2021-11-20 06:20:37,401 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/data/508605b20/cb7320b98efb40a383012432c8b0086d/FLAG1977a918e [2021-11-20 06:20:38,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:20:38,015 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/sv-benchmarks/c/memsafety/test-0232-3.i [2021-11-20 06:20:38,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/data/508605b20/cb7320b98efb40a383012432c8b0086d/FLAG1977a918e [2021-11-20 06:20:38,297 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/data/508605b20/cb7320b98efb40a383012432c8b0086d [2021-11-20 06:20:38,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:20:38,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:20:38,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:20:38,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:20:38,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:20:38,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e56960d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38, skipping insertion in model container [2021-11-20 06:20:38,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:20:38,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:20:38,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:20:38,735 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:20:38,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:20:38,839 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:20:38,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38 WrapperNode [2021-11-20 06:20:38,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:20:38,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:20:38,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:20:38,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:20:38,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,945 INFO L137 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2021-11-20 06:20:38,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:20:38,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:20:38,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:20:38,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:20:38,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:38,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:39,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:39,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:39,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:20:39,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:20:39,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:20:39,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:20:39,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (1/1) ... [2021-11-20 06:20:39,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:20:39,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:20:39,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:20:39,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:20:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:20:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:20:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:20:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:20:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:20:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:20:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:20:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:20:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:20:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:20:39,376 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:20:39,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:20:39,945 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:20:39,954 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:20:39,955 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 06:20:39,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:20:39 BoogieIcfgContainer [2021-11-20 06:20:39,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:20:39,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:20:39,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:20:39,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:20:39,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:20:38" (1/3) ... [2021-11-20 06:20:39,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8ac52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:20:39, skipping insertion in model container [2021-11-20 06:20:39,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:20:38" (2/3) ... [2021-11-20 06:20:39,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8ac52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:20:39, skipping insertion in model container [2021-11-20 06:20:39,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:20:39" (3/3) ... [2021-11-20 06:20:39,969 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0232-3.i [2021-11-20 06:20:39,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:20:39,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2021-11-20 06:20:40,036 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:20:40,045 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:20:40,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2021-11-20 06:20:40,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 51 states have (on average 2.215686274509804) internal successors, (113), 106 states have internal predecessors, (113), 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) [2021-11-20 06:20:40,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 06:20:40,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:40,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 06:20:40,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2021-11-20 06:20:40,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:40,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84485793] [2021-11-20 06:20:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:40,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:40,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84485793] [2021-11-20 06:20:40,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84485793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:40,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:40,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:20:40,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288008480] [2021-11-20 06:20:40,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:40,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:20:40,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:20:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:20:40,423 INFO L87 Difference]: Start difference. First operand has 107 states, 51 states have (on average 2.215686274509804) internal successors, (113), 106 states have internal predecessors, (113), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2021-11-20 06:20:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:40,766 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-11-20 06:20:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:20:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2021-11-20 06:20:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:40,793 INFO L225 Difference]: With dead ends: 132 [2021-11-20 06:20:40,794 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 06:20:40,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:20:40,801 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 185 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:40,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 81 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:20:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 06:20:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2021-11-20 06:20:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 51 states have (on average 2.019607843137255) internal successors, (103), 97 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) [2021-11-20 06:20:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2021-11-20 06:20:40,888 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 4 [2021-11-20 06:20:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:40,889 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2021-11-20 06:20:40,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2021-11-20 06:20:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2021-11-20 06:20:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 06:20:40,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:40,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 06:20:40,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:20:40,891 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:40,893 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2021-11-20 06:20:40,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:40,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252627884] [2021-11-20 06:20:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:40,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:41,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252627884] [2021-11-20 06:20:41,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252627884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:41,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:41,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:20:41,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939118833] [2021-11-20 06:20:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:41,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:20:41,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:20:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:20:41,033 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2021-11-20 06:20:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:41,456 INFO L93 Difference]: Finished difference Result 221 states and 234 transitions. [2021-11-20 06:20:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:20:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2021-11-20 06:20:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:41,467 INFO L225 Difference]: With dead ends: 221 [2021-11-20 06:20:41,467 INFO L226 Difference]: Without dead ends: 221 [2021-11-20 06:20:41,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:20:41,476 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 184 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:41,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 157 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:20:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-20 06:20:41,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 105. [2021-11-20 06:20:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 104 states have internal predecessors, (116), 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) [2021-11-20 06:20:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-11-20 06:20:41,501 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 4 [2021-11-20 06:20:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:41,501 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-11-20 06:20:41,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2021-11-20 06:20:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-11-20 06:20:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 06:20:41,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:41,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 06:20:41,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:20:41,503 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash 28694727, now seen corresponding path program 1 times [2021-11-20 06:20:41,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:41,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019066979] [2021-11-20 06:20:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:41,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:41,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:41,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019066979] [2021-11-20 06:20:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019066979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:41,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:41,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:20:41,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464366797] [2021-11-20 06:20:41,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:41,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:20:41,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:20:41,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:20:41,590 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-20 06:20:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:41,710 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-11-20 06:20:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:41,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-20 06:20:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:41,713 INFO L225 Difference]: With dead ends: 120 [2021-11-20 06:20:41,714 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 06:20:41,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:20:41,717 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 63 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:41,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 84 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 06:20:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2021-11-20 06:20:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.7903225806451613) internal successors, (111), 100 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) [2021-11-20 06:20:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-11-20 06:20:41,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 5 [2021-11-20 06:20:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:41,745 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-11-20 06:20:41,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-20 06:20:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-11-20 06:20:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 06:20:41,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:41,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 06:20:41,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:20:41,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash 28694728, now seen corresponding path program 1 times [2021-11-20 06:20:41,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:41,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720945379] [2021-11-20 06:20:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:41,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:41,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:41,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720945379] [2021-11-20 06:20:41,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720945379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:41,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:41,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:20:41,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659105065] [2021-11-20 06:20:41,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:41,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:20:41,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:41,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:20:41,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:20:41,838 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-20 06:20:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:41,919 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-11-20 06:20:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:41,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-11-20 06:20:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:41,922 INFO L225 Difference]: With dead ends: 98 [2021-11-20 06:20:41,922 INFO L226 Difference]: Without dead ends: 98 [2021-11-20 06:20:41,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:20:41,935 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:41,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 54 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-20 06:20:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-20 06:20:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 62 states have (on average 1.7096774193548387) internal successors, (106), 96 states have internal predecessors, (106), 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) [2021-11-20 06:20:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-11-20 06:20:41,955 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 5 [2021-11-20 06:20:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:41,956 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-11-20 06:20:41,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-20 06:20:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-11-20 06:20:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:20:41,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:41,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:41,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:20:41,958 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1328641136, now seen corresponding path program 1 times [2021-11-20 06:20:41,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:41,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54056813] [2021-11-20 06:20:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:41,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:42,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54056813] [2021-11-20 06:20:42,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54056813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:42,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:42,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:20:42,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042335614] [2021-11-20 06:20:42,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:42,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:20:42,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:42,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:20:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:20:42,166 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-11-20 06:20:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:42,419 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-11-20 06:20:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:20:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 10 [2021-11-20 06:20:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:42,421 INFO L225 Difference]: With dead ends: 107 [2021-11-20 06:20:42,422 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 06:20:42,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:20:42,425 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 15 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:42,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 429 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 06:20:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-11-20 06:20:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.6470588235294117) internal successors, (112), 102 states have internal predecessors, (112), 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) [2021-11-20 06:20:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2021-11-20 06:20:42,451 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 10 [2021-11-20 06:20:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:42,453 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2021-11-20 06:20:42,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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) [2021-11-20 06:20:42,458 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2021-11-20 06:20:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:20:42,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:42,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:42,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:20:42,462 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1762075788, now seen corresponding path program 1 times [2021-11-20 06:20:42,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239217814] [2021-11-20 06:20:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:42,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:42,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239217814] [2021-11-20 06:20:42,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239217814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:42,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:42,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:20:42,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356227249] [2021-11-20 06:20:42,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:42,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:20:42,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:20:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:20:42,598 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-20 06:20:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:42,746 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-11-20 06:20:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:20:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 11 [2021-11-20 06:20:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:42,747 INFO L225 Difference]: With dead ends: 120 [2021-11-20 06:20:42,748 INFO L226 Difference]: Without dead ends: 120 [2021-11-20 06:20:42,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:20:42,749 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 375 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:42,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 62 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-20 06:20:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-11-20 06:20:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 98 states have internal predecessors, (108), 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) [2021-11-20 06:20:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-11-20 06:20:42,757 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 11 [2021-11-20 06:20:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:42,757 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-11-20 06:20:42,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-20 06:20:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-11-20 06:20:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:20:42,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:42,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:42,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:20:42,759 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:42,759 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015976, now seen corresponding path program 1 times [2021-11-20 06:20:42,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:42,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023520985] [2021-11-20 06:20:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:42,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:42,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023520985] [2021-11-20 06:20:42,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023520985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:42,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:42,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:20:42,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157796446] [2021-11-20 06:20:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:42,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:20:42,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:20:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:20:42,852 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-11-20 06:20:43,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:43,038 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2021-11-20 06:20:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:20:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 [2021-11-20 06:20:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:43,040 INFO L225 Difference]: With dead ends: 116 [2021-11-20 06:20:43,040 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 06:20:43,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:20:43,042 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 200 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:43,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 122 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 06:20:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-11-20 06:20:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 65 states have (on average 1.646153846153846) internal successors, (107), 97 states have internal predecessors, (107), 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) [2021-11-20 06:20:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2021-11-20 06:20:43,049 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 18 [2021-11-20 06:20:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:43,050 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2021-11-20 06:20:43,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-11-20 06:20:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2021-11-20 06:20:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:20:43,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:43,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:43,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:20:43,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2075015977, now seen corresponding path program 1 times [2021-11-20 06:20:43,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:43,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542245903] [2021-11-20 06:20:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:43,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:43,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542245903] [2021-11-20 06:20:43,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542245903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:43,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:43,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:20:43,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271134790] [2021-11-20 06:20:43,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:43,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:20:43,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:20:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:20:43,255 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-11-20 06:20:43,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:43,437 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2021-11-20 06:20:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:20:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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 [2021-11-20 06:20:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:43,439 INFO L225 Difference]: With dead ends: 121 [2021-11-20 06:20:43,439 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 06:20:43,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:20:43,440 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 169 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:43,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 06:20:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-11-20 06:20:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 96 states have internal predecessors, (106), 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) [2021-11-20 06:20:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2021-11-20 06:20:43,451 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 18 [2021-11-20 06:20:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:43,451 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2021-11-20 06:20:43,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 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) [2021-11-20 06:20:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2021-11-20 06:20:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:20:43,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:43,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:43,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:20:43,453 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:43,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1257147052, now seen corresponding path program 1 times [2021-11-20 06:20:43,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:43,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839143888] [2021-11-20 06:20:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:43,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:43,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:43,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839143888] [2021-11-20 06:20:43,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839143888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:43,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:43,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:20:43,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183935156] [2021-11-20 06:20:43,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:43,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:20:43,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:43,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:20:43,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:20:43,550 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-11-20 06:20:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:43,658 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2021-11-20 06:20:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:20:43,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 20 [2021-11-20 06:20:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:43,659 INFO L225 Difference]: With dead ends: 89 [2021-11-20 06:20:43,659 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 06:20:43,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:20:43,660 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 98 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:43,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 139 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:43,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 06:20:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-20 06:20:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.631578947368421) internal successors, (93), 88 states have internal predecessors, (93), 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) [2021-11-20 06:20:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-11-20 06:20:43,664 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 20 [2021-11-20 06:20:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-11-20 06:20:43,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2021-11-20 06:20:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-11-20 06:20:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:20:43,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:43,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:43,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:20:43,666 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:43,666 INFO L85 PathProgramCache]: Analyzing trace with hash -663319494, now seen corresponding path program 1 times [2021-11-20 06:20:43,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:43,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778476705] [2021-11-20 06:20:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:43,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:43,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:43,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778476705] [2021-11-20 06:20:43,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778476705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:43,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:43,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:20:43,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995365053] [2021-11-20 06:20:43,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:43,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:20:43,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:20:43,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:20:43,771 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-11-20 06:20:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:43,895 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-11-20 06:20:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:20:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2021-11-20 06:20:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:43,896 INFO L225 Difference]: With dead ends: 88 [2021-11-20 06:20:43,896 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 06:20:43,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:20:43,897 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:43,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 189 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 06:20:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-20 06:20:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 87 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) [2021-11-20 06:20:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-20 06:20:43,901 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 21 [2021-11-20 06:20:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:43,902 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-20 06:20:43,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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) [2021-11-20 06:20:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-20 06:20:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 06:20:43,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:43,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:43,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:20:43,903 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -663319493, now seen corresponding path program 1 times [2021-11-20 06:20:43,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:43,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259019601] [2021-11-20 06:20:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:43,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:44,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:44,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259019601] [2021-11-20 06:20:44,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259019601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:44,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:44,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:20:44,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462519056] [2021-11-20 06:20:44,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:44,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:20:44,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:44,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:20:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:20:44,050 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-11-20 06:20:44,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:44,287 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-11-20 06:20:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:20:44,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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 21 [2021-11-20 06:20:44,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:44,289 INFO L225 Difference]: With dead ends: 87 [2021-11-20 06:20:44,289 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:20:44,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:20:44,290 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 182 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:44,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 152 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:20:44,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:20:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 06:20:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 86 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) [2021-11-20 06:20:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-11-20 06:20:44,294 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 21 [2021-11-20 06:20:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:44,294 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-11-20 06:20:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-11-20 06:20:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-11-20 06:20:44,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:20:44,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:44,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:44,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:20:44,296 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash 911932203, now seen corresponding path program 1 times [2021-11-20 06:20:44,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:44,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377318790] [2021-11-20 06:20:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:44,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:44,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377318790] [2021-11-20 06:20:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377318790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:44,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:44,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:20:44,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082830972] [2021-11-20 06:20:44,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:44,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:20:44,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:20:44,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:20:44,547 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2021-11-20 06:20:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:45,228 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2021-11-20 06:20:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:20:45,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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 22 [2021-11-20 06:20:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:45,231 INFO L225 Difference]: With dead ends: 169 [2021-11-20 06:20:45,231 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 06:20:45,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:20:45,233 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 300 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:45,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 253 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:20:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 06:20:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 101. [2021-11-20 06:20:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 71 states have (on average 1.4929577464788732) internal successors, (106), 100 states have internal predecessors, (106), 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) [2021-11-20 06:20:45,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-11-20 06:20:45,239 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 22 [2021-11-20 06:20:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:45,239 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-11-20 06:20:45,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 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) [2021-11-20 06:20:45,240 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-11-20 06:20:45,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:20:45,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:45,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:45,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:20:45,244 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:45,244 INFO L85 PathProgramCache]: Analyzing trace with hash -428723026, now seen corresponding path program 1 times [2021-11-20 06:20:45,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:45,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100229616] [2021-11-20 06:20:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:45,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:45,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:45,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100229616] [2021-11-20 06:20:45,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100229616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:20:45,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460383671] [2021-11-20 06:20:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:45,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:20:45,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:20:45,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:20:45,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:20:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:45,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:20:45,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:20:45,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:20:45,967 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 06:20:45,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-20 06:20:46,121 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:20:46,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-20 06:20:46,296 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:20:46,297 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 41 treesize of output 21 [2021-11-20 06:20:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:46,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:20:46,524 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 44 treesize of output 40 [2021-11-20 06:20:46,987 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-20 06:20:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2021-11-20 06:20:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:47,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460383671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:20:47,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:20:47,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-11-20 06:20:47,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249226751] [2021-11-20 06:20:47,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:20:47,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:20:47,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:20:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:20:47,048 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-11-20 06:20:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:47,715 INFO L93 Difference]: Finished difference Result 252 states and 269 transitions. [2021-11-20 06:20:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:20:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 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 22 [2021-11-20 06:20:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:47,718 INFO L225 Difference]: With dead ends: 252 [2021-11-20 06:20:47,718 INFO L226 Difference]: Without dead ends: 252 [2021-11-20 06:20:47,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:20:47,721 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 365 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:47,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 672 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 585 Invalid, 0 Unknown, 297 Unchecked, 0.4s Time] [2021-11-20 06:20:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-20 06:20:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 109. [2021-11-20 06:20:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.4683544303797469) internal successors, (116), 108 states have internal predecessors, (116), 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) [2021-11-20 06:20:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2021-11-20 06:20:47,727 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 22 [2021-11-20 06:20:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:47,727 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2021-11-20 06:20:47,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 21 states have internal predecessors, (52), 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) [2021-11-20 06:20:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2021-11-20 06:20:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:20:47,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:47,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:47,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:20:47,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:20:47,953 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash -428723025, now seen corresponding path program 1 times [2021-11-20 06:20:47,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:47,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481568947] [2021-11-20 06:20:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:47,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:48,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:48,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481568947] [2021-11-20 06:20:48,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481568947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:20:48,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191238819] [2021-11-20 06:20:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:48,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:20:48,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:20:48,174 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:20:48,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:20:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:48,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 06:20:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:20:48,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 06:20:48,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:20:48,620 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 06:20:48,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 06:20:48,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-20 06:20:48,779 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:20:48,780 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 55 treesize of output 50 [2021-11-20 06:20:48,797 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:20:48,798 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 47 treesize of output 38 [2021-11-20 06:20:48,998 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:20:48,999 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 62 treesize of output 42 [2021-11-20 06:20:49,008 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:20:49,009 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 36 treesize of output 24 [2021-11-20 06:20:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:49,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:20:49,393 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 91 treesize of output 87 [2021-11-20 06:20:49,398 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 142 treesize of output 130 [2021-11-20 06:20:49,688 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 52 treesize of output 48 [2021-11-20 06:20:49,699 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:20:49,699 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 48 treesize of output 47 [2021-11-20 06:20:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:49,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191238819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:20:49,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:20:49,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 23 [2021-11-20 06:20:49,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45337856] [2021-11-20 06:20:49,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:20:49,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:20:49,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:49,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:20:49,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:20:49,835 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 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) [2021-11-20 06:20:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:50,749 INFO L93 Difference]: Finished difference Result 233 states and 247 transitions. [2021-11-20 06:20:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:20:50,750 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 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 22 [2021-11-20 06:20:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:50,752 INFO L225 Difference]: With dead ends: 233 [2021-11-20 06:20:50,752 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 06:20:50,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:20:50,754 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 449 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:50,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 676 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 420 Invalid, 0 Unknown, 232 Unchecked, 0.4s Time] [2021-11-20 06:20:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 06:20:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2021-11-20 06:20:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 79 states have (on average 1.4556962025316456) internal successors, (115), 108 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) [2021-11-20 06:20:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-11-20 06:20:50,763 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 22 [2021-11-20 06:20:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:50,763 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-11-20 06:20:50,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 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) [2021-11-20 06:20:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-11-20 06:20:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:20:50,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:50,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:50,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:20:50,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:20:50,981 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:50,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1794872678, now seen corresponding path program 1 times [2021-11-20 06:20:50,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:50,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55347386] [2021-11-20 06:20:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:50,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:51,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55347386] [2021-11-20 06:20:51,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55347386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:51,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:51,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:20:51,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53787356] [2021-11-20 06:20:51,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:51,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:20:51,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:51,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:20:51,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:20:51,176 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 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) [2021-11-20 06:20:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:51,993 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2021-11-20 06:20:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:20:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 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 [2021-11-20 06:20:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:51,996 INFO L225 Difference]: With dead ends: 166 [2021-11-20 06:20:51,996 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 06:20:51,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:20:51,997 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 344 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:51,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 199 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:20:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 06:20:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2021-11-20 06:20:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 80 states have (on average 1.45) internal successors, (116), 109 states have internal predecessors, (116), 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) [2021-11-20 06:20:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2021-11-20 06:20:52,007 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 23 [2021-11-20 06:20:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:52,007 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2021-11-20 06:20:52,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 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) [2021-11-20 06:20:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2021-11-20 06:20:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:20:52,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:52,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:52,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 06:20:52,012 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash 193521933, now seen corresponding path program 1 times [2021-11-20 06:20:52,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:52,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736878800] [2021-11-20 06:20:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:52,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:52,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736878800] [2021-11-20 06:20:52,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736878800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:52,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:52,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:20:52,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008038825] [2021-11-20 06:20:52,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:52,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:20:52,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:20:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:20:52,248 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-11-20 06:20:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:52,854 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-11-20 06:20:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:20:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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 [2021-11-20 06:20:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:52,856 INFO L225 Difference]: With dead ends: 117 [2021-11-20 06:20:52,856 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 06:20:52,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:20:52,857 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 191 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:52,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 245 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:20:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 06:20:52,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2021-11-20 06:20:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 110 states have internal predecessors, (117), 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) [2021-11-20 06:20:52,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2021-11-20 06:20:52,862 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 24 [2021-11-20 06:20:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:52,862 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2021-11-20 06:20:52,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 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) [2021-11-20 06:20:52,862 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2021-11-20 06:20:52,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:20:52,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:52,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:52,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:20:52,863 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:52,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1704212733, now seen corresponding path program 1 times [2021-11-20 06:20:52,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:52,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900564392] [2021-11-20 06:20:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:52,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:52,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:52,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900564392] [2021-11-20 06:20:52,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900564392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:52,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:52,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:20:52,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025251042] [2021-11-20 06:20:52,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:52,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:20:52,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:20:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:20:52,992 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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) [2021-11-20 06:20:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:53,161 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2021-11-20 06:20:53,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:20:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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) Word has length 25 [2021-11-20 06:20:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:53,163 INFO L225 Difference]: With dead ends: 111 [2021-11-20 06:20:53,163 INFO L226 Difference]: Without dead ends: 111 [2021-11-20 06:20:53,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:20:53,164 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:53,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 57 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-20 06:20:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-11-20 06:20:53,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 109 states have internal predecessors, (116), 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) [2021-11-20 06:20:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2021-11-20 06:20:53,169 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 25 [2021-11-20 06:20:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:53,169 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2021-11-20 06:20:53,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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) [2021-11-20 06:20:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2021-11-20 06:20:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:20:53,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:53,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:53,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:20:53,170 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:53,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1704212734, now seen corresponding path program 1 times [2021-11-20 06:20:53,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:53,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283400053] [2021-11-20 06:20:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:53,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:53,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:53,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283400053] [2021-11-20 06:20:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283400053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:53,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:53,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:20:53,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084480700] [2021-11-20 06:20:53,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:53,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:20:53,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:53,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:20:53,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:20:53,215 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2021-11-20 06:20:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:53,274 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-11-20 06:20:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:20:53,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) Word has length 25 [2021-11-20 06:20:53,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:53,276 INFO L225 Difference]: With dead ends: 103 [2021-11-20 06:20:53,276 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 06:20:53,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:20:53,277 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 69 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:53,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 48 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 06:20:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-20 06:20:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 102 states have internal predecessors, (108), 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) [2021-11-20 06:20:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-11-20 06:20:53,283 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 25 [2021-11-20 06:20:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:53,283 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-11-20 06:20:53,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2021-11-20 06:20:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-11-20 06:20:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:20:53,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:53,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:53,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:20:53,285 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1290987217, now seen corresponding path program 1 times [2021-11-20 06:20:53,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:53,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345383363] [2021-11-20 06:20:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:53,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:53,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345383363] [2021-11-20 06:20:53,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345383363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:53,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:53,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:20:53,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761755681] [2021-11-20 06:20:53,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:53,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:20:53,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:20:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:20:53,373 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-20 06:20:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:53,467 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-11-20 06:20:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:20:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 26 [2021-11-20 06:20:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:53,469 INFO L225 Difference]: With dead ends: 102 [2021-11-20 06:20:53,469 INFO L226 Difference]: Without dead ends: 102 [2021-11-20 06:20:53,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:20:53,470 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 78 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:53,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 127 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-20 06:20:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-20 06:20:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 101 states have internal predecessors, (107), 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) [2021-11-20 06:20:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-11-20 06:20:53,480 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 26 [2021-11-20 06:20:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:53,481 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-11-20 06:20:53,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-20 06:20:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-11-20 06:20:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:20:53,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:53,482 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:53,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:20:53,483 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1365898173, now seen corresponding path program 1 times [2021-11-20 06:20:53,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:53,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715664043] [2021-11-20 06:20:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:53,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:53,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:53,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715664043] [2021-11-20 06:20:53,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715664043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:53,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:53,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:20:53,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353581684] [2021-11-20 06:20:53,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:53,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:20:53,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:20:53,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:20:53,571 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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) [2021-11-20 06:20:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:53,698 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-11-20 06:20:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:20:53,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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 27 [2021-11-20 06:20:53,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:53,700 INFO L225 Difference]: With dead ends: 101 [2021-11-20 06:20:53,700 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 06:20:53,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:20:53,701 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 71 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:53,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 103 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 06:20:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-20 06:20:53,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.308641975308642) internal successors, (106), 100 states have internal predecessors, (106), 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) [2021-11-20 06:20:53,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-11-20 06:20:53,707 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 27 [2021-11-20 06:20:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:53,707 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-11-20 06:20:53,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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) [2021-11-20 06:20:53,708 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-11-20 06:20:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:20:53,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:53,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:53,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 06:20:53,709 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:53,710 INFO L85 PathProgramCache]: Analyzing trace with hash -606829485, now seen corresponding path program 1 times [2021-11-20 06:20:53,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:53,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776135438] [2021-11-20 06:20:53,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:53,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:54,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776135438] [2021-11-20 06:20:54,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776135438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:54,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:54,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 06:20:54,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089650916] [2021-11-20 06:20:54,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:54,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:20:54,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:20:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:20:54,105 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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) [2021-11-20 06:20:54,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:54,920 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-11-20 06:20:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:20:54,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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 28 [2021-11-20 06:20:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:54,922 INFO L225 Difference]: With dead ends: 105 [2021-11-20 06:20:54,922 INFO L226 Difference]: Without dead ends: 105 [2021-11-20 06:20:54,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:20:54,923 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 176 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:54,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 285 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:20:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-20 06:20:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-20 06:20:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 104 states have internal predecessors, (110), 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) [2021-11-20 06:20:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-11-20 06:20:54,928 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 28 [2021-11-20 06:20:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:54,928 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-11-20 06:20:54,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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) [2021-11-20 06:20:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-11-20 06:20:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:20:54,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:54,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:54,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 06:20:54,930 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1631844736, now seen corresponding path program 1 times [2021-11-20 06:20:54,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:54,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937548353] [2021-11-20 06:20:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:54,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:55,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:55,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937548353] [2021-11-20 06:20:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937548353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:55,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:55,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:20:55,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104601769] [2021-11-20 06:20:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:55,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:20:55,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:20:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:20:55,011 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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) [2021-11-20 06:20:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:55,186 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-11-20 06:20:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:20:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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 [2021-11-20 06:20:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:55,188 INFO L225 Difference]: With dead ends: 104 [2021-11-20 06:20:55,188 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 06:20:55,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:20:55,190 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 128 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:55,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 83 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:20:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 06:20:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-20 06:20:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 85 states have (on average 1.2823529411764707) internal successors, (109), 103 states have internal predecessors, (109), 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) [2021-11-20 06:20:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-11-20 06:20:55,195 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 29 [2021-11-20 06:20:55,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:55,195 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-11-20 06:20:55,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 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) [2021-11-20 06:20:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-11-20 06:20:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:20:55,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:55,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:55,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 06:20:55,197 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:55,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1014103750, now seen corresponding path program 1 times [2021-11-20 06:20:55,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:55,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538488370] [2021-11-20 06:20:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:55,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:56,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:56,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538488370] [2021-11-20 06:20:56,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538488370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:56,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:56,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-20 06:20:56,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494283190] [2021-11-20 06:20:56,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:56,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:20:56,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:20:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:20:56,736 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 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) [2021-11-20 06:20:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:20:58,540 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2021-11-20 06:20:58,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:20:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 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 33 [2021-11-20 06:20:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:20:58,542 INFO L225 Difference]: With dead ends: 153 [2021-11-20 06:20:58,542 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 06:20:58,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:20:58,544 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 88 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:20:58,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 363 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:20:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 06:20:58,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 127. [2021-11-20 06:20:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 126 states have internal predecessors, (133), 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) [2021-11-20 06:20:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 133 transitions. [2021-11-20 06:20:58,548 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 133 transitions. Word has length 33 [2021-11-20 06:20:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:20:58,549 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 133 transitions. [2021-11-20 06:20:58,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 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) [2021-11-20 06:20:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 133 transitions. [2021-11-20 06:20:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:20:58,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:20:58,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:20:58,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-20 06:20:58,550 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:20:58,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:20:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1014104394, now seen corresponding path program 1 times [2021-11-20 06:20:58,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:20:58,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382448796] [2021-11-20 06:20:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:20:58,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:20:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:20:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:20:59,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:20:59,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382448796] [2021-11-20 06:20:59,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382448796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:20:59,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:20:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 06:20:59,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551209675] [2021-11-20 06:20:59,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:20:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:20:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:20:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:20:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:20:59,148 INFO L87 Difference]: Start difference. First operand 127 states and 133 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2021-11-20 06:21:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:00,200 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2021-11-20 06:21:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:21:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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 33 [2021-11-20 06:21:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:00,202 INFO L225 Difference]: With dead ends: 130 [2021-11-20 06:21:00,202 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 06:21:00,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:21:00,204 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 47 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:00,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 574 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:21:00,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 06:21:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-11-20 06:21:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 91 states have (on average 1.2637362637362637) internal successors, (115), 109 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) [2021-11-20 06:21:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2021-11-20 06:21:00,210 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 33 [2021-11-20 06:21:00,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:00,210 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2021-11-20 06:21:00,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 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) [2021-11-20 06:21:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2021-11-20 06:21:00,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:21:00,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:00,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:00,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 06:21:00,212 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:21:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:00,213 INFO L85 PathProgramCache]: Analyzing trace with hash 762441251, now seen corresponding path program 1 times [2021-11-20 06:21:00,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:21:00,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559407270] [2021-11-20 06:21:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:00,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:21:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:21:00,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:21:00,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559407270] [2021-11-20 06:21:00,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559407270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:21:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636364265] [2021-11-20 06:21:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:00,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:21:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:21:00,768 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:21:00,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:21:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:00,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 06:21:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:00,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:21:00,943 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:21:00,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 06:21:01,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 06:21:01,193 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 39 treesize of output 35 [2021-11-20 06:21:01,198 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 [2021-11-20 06:21:01,338 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-20 06:21:01,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-20 06:21:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:21:01,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:21:01,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 63 [2021-11-20 06:21:01,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 48 [2021-11-20 06:21:01,835 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 0 case distinctions, treesize of input 46 treesize of output 22 [2021-11-20 06:21:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:21:02,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:21:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:21:02,255 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-20 06:21:02,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 60 [2021-11-20 06:21:02,455 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 67 treesize of output 63 [2021-11-20 06:21:02,471 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-20 06:21:02,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 72 treesize of output 69 [2021-11-20 06:21:02,889 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 79 treesize of output 55 [2021-11-20 06:21:03,027 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-11-20 06:21:03,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 36 [2021-11-20 06:21:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:03,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:03,134 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 80 treesize of output 76 [2021-11-20 06:21:17,680 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 861 treesize of output 845 [2021-11-20 06:21:19,423 INFO L354 Elim1Store]: treesize reduction 109, result has 67.0 percent of original size [2021-11-20 06:21:19,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 4002387 treesize of output 3775197 [2021-11-20 06:28:41,820 WARN L227 SmtUtils]: Spent 7.37m on a formula simplification. DAG size of input: 774 DAG size of output: 757 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:28:56,176 WARN L227 SmtUtils]: Spent 14.35s on a formula simplification that was a NOOP. DAG size: 751 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:28:56,258 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-20 06:28:56,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3257800 treesize of output 3257800 [2021-11-20 06:29:11,612 WARN L227 SmtUtils]: Spent 15.35s on a formula simplification that was a NOOP. DAG size: 751 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:29:26,207 WARN L227 SmtUtils]: Spent 14.59s on a formula simplification that was a NOOP. DAG size: 741 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:29:26,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:29:26,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:29:26,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-20 06:29:26,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184969997] [2021-11-20 06:29:26,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:26,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:29:26,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:26,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:29:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1540, Unknown=1, NotChecked=0, Total=1722 [2021-11-20 06:29:26,295 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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) [2021-11-20 06:29:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:27,889 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2021-11-20 06:29:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:29:27,889 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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 37 [2021-11-20 06:29:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:27,890 INFO L225 Difference]: With dead ends: 110 [2021-11-20 06:29:27,890 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 06:29:27,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=594, Invalid=3565, Unknown=1, NotChecked=0, Total=4160 [2021-11-20 06:29:27,892 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:27,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 383 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:29:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 06:29:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-20 06:29:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 91 states have (on average 1.2527472527472527) internal successors, (114), 108 states have internal predecessors, (114), 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) [2021-11-20 06:29:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-11-20 06:29:27,895 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 37 [2021-11-20 06:29:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:27,895 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-11-20 06:29:27,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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) [2021-11-20 06:29:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-11-20 06:29:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:29:27,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:27,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:27,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:28,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:29:28,110 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:29:28,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -578213978, now seen corresponding path program 1 times [2021-11-20 06:29:28,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:28,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056055521] [2021-11-20 06:29:28,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:28,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:28,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056055521] [2021-11-20 06:29:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056055521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131391866] [2021-11-20 06:29:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:28,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:28,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:28,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:29:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:28,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:29:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:28,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:29:28,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:29:28,542 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 06:29:28,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-11-20 06:29:28,625 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:29:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-11-20 06:29:28,714 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:29:28,715 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 41 treesize of output 21 [2021-11-20 06:29:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:28,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:28,836 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 44 treesize of output 40 [2021-11-20 06:29:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131391866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:29,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:29,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 18 [2021-11-20 06:29:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257429428] [2021-11-20 06:29:29,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:29,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:29:29,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:29,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:29:29,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:29:29,920 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 19 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) [2021-11-20 06:29:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:30,190 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2021-11-20 06:29:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:29:30,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 19 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 37 [2021-11-20 06:29:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:30,192 INFO L225 Difference]: With dead ends: 108 [2021-11-20 06:29:30,192 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 06:29:30,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:29:30,193 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 101 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:30,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 297 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 264 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-11-20 06:29:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 06:29:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-11-20 06:29:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 107 states have internal predecessors, (113), 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) [2021-11-20 06:29:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2021-11-20 06:29:30,197 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 37 [2021-11-20 06:29:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:30,197 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2021-11-20 06:29:30,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 19 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) [2021-11-20 06:29:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2021-11-20 06:29:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:29:30,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:30,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:30,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:30,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:29:30,422 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:29:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash -578213977, now seen corresponding path program 1 times [2021-11-20 06:29:30,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:30,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975672938] [2021-11-20 06:29:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:30,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:30,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975672938] [2021-11-20 06:29:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975672938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785532156] [2021-11-20 06:29:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:30,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:30,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:30,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:30,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:29:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:30,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-20 06:29:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:30,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:29:30,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:29:31,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 06:29:31,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:29:31,080 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 06:29:31,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-20 06:29:31,091 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 06:29:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-20 06:29:31,185 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:29:31,185 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 55 treesize of output 50 [2021-11-20 06:29:31,198 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 06:29:31,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-11-20 06:29:31,336 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:29:31,336 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 66 treesize of output 46 [2021-11-20 06:29:31,341 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:29:31,342 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 40 treesize of output 24 [2021-11-20 06:29:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:31,642 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 91 treesize of output 87 [2021-11-20 06:29:31,646 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 142 treesize of output 130 [2021-11-20 06:29:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:32,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785532156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:32,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:29:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2021-11-20 06:29:32,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988905622] [2021-11-20 06:29:32,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:32,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:29:32,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:29:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:29:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:29:32,120 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 21 states, 20 states have (on average 4.8) internal successors, (96), 21 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) [2021-11-20 06:29:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:32,599 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-11-20 06:29:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:29:32,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.8) internal successors, (96), 21 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 37 [2021-11-20 06:29:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:32,601 INFO L225 Difference]: With dead ends: 107 [2021-11-20 06:29:32,601 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 06:29:32,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:29:32,602 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 165 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:32,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 287 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2021-11-20 06:29:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 06:29:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2021-11-20 06:29:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 98 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) [2021-11-20 06:29:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-11-20 06:29:32,605 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 37 [2021-11-20 06:29:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:32,606 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-11-20 06:29:32,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.8) internal successors, (96), 21 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) [2021-11-20 06:29:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-11-20 06:29:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:29:32,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:32,606 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:32,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:32,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:29:32,807 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:29:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2134124894, now seen corresponding path program 1 times [2021-11-20 06:29:32,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:29:32,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138069486] [2021-11-20 06:29:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:32,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:29:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:33,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:29:33,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138069486] [2021-11-20 06:29:33,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138069486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:29:33,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566014418] [2021-11-20 06:29:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:33,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:29:33,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:29:33,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:29:33,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:29:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 06:29:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:33,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:29:33,741 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:29:33,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 06:29:33,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:29:34,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:29:34,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 06:29:34,184 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-20 06:29:34,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-20 06:29:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:29:34,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:29:34,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 36 [2021-11-20 06:29:34,417 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-20 06:29:34,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-11-20 06:29:34,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:29:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:29:34,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:29:34,909 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-20 06:29:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 63 treesize of output 57 [2021-11-20 06:29:35,033 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 06:29:35,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 69 treesize of output 53 [2021-11-20 06:29:35,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:29:35,240 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 88 treesize of output 80 [2021-11-20 06:29:35,314 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 06:29:35,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 28 [2021-11-20 06:29:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:35,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:35,432 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 84 treesize of output 80 [2021-11-20 06:30:25,442 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 334 treesize of output 330 [2021-11-20 06:30:28,237 INFO L354 Elim1Store]: treesize reduction 148, result has 58.4 percent of original size [2021-11-20 06:30:28,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 827469 treesize of output 806912 [2021-11-20 06:30:35,485 WARN L227 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 1258 DAG size of output: 1256 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:30:35,621 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-11-20 06:30:35,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 731828 treesize of output 731828 [2021-11-20 06:30:40,973 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 1253 DAG size of output: 981 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:30:44,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:30:44,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:30:44,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-20 06:30:44,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595884691] [2021-11-20 06:30:44,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:44,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:30:44,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:30:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:30:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1555, Unknown=14, NotChecked=0, Total=1722 [2021-11-20 06:30:44,317 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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) [2021-11-20 06:30:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:47,343 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2021-11-20 06:30:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:30:47,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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 38 [2021-11-20 06:30:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:47,345 INFO L225 Difference]: With dead ends: 99 [2021-11-20 06:30:47,345 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 06:30:47,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=645, Invalid=3631, Unknown=14, NotChecked=0, Total=4290 [2021-11-20 06:30:47,348 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 258 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:47,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 260 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:30:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 06:30:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-20 06:30:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 97 states have internal predecessors, (102), 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) [2021-11-20 06:30:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-20 06:30:47,353 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 38 [2021-11-20 06:30:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:47,353 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-20 06:30:47,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 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) [2021-11-20 06:30:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-20 06:30:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:30:47,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:47,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:47,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:47,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:30:47,568 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 51 more)] === [2021-11-20 06:30:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1733362171, now seen corresponding path program 1 times [2021-11-20 06:30:47,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:30:47,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233687179] [2021-11-20 06:30:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:47,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:30:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:30:48,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:30:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233687179] [2021-11-20 06:30:48,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233687179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:30:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770325245] [2021-11-20 06:30:48,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:48,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:30:48,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:30:48,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:30:48,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d9c363f-98c0-40a8-9d0d-72d828920bf5/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:30:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-20 06:30:48,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:48,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:30:48,284 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:30:48,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 06:30:48,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:30:48,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 06:30:48,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-11-20 06:30:48,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:30:48,774 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-20 06:30:48,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 57 [2021-11-20 06:30:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:48,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-11-20 06:30:49,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:49,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:30:49,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 47 [2021-11-20 06:30:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:49,257 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 0 case distinctions, treesize of input 26 treesize of output 10 [2021-11-20 06:30:49,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:49,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:30:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:30:49,566 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 06:30:49,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 59 [2021-11-20 06:30:49,726 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-20 06:30:49,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 70 [2021-11-20 06:30:49,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:30:50,121 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 133 treesize of output 125 [2021-11-20 06:30:50,232 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 06:30:50,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 45 [2021-11-20 06:30:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:50,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:50,567 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 84 treesize of output 80 [2021-11-20 06:30:56,677 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 37 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:31:09,596 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 888 treesize of output 872 [2021-11-20 06:31:14,011 INFO L354 Elim1Store]: treesize reduction 161, result has 54.8 percent of original size [2021-11-20 06:31:14,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 7988797 treesize of output 7563291