./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:05:38,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:05:38,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:05:38,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:05:38,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:05:38,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:05:38,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:05:38,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:05:38,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:05:38,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:05:38,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:05:38,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:05:38,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:05:38,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:05:38,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:05:38,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:05:38,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:05:38,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:05:38,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:05:38,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:05:38,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:05:38,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:05:38,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:05:38,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:05:38,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:05:38,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:05:38,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:05:38,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:05:38,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:05:38,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:05:38,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:05:38,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:05:38,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:05:38,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:05:38,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:05:38,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:05:38,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:05:38,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:05:38,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:05:38,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:05:38,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:05:38,852 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:05:38,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:05:38,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:05:38,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:05:38,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:05:38,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:05:38,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:05:38,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:05:38,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:05:38,881 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:05:38,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:05:38,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:05:38,882 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:05:38,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:05:38,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:05:38,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:05:38,882 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:05:38,882 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:05:38,882 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:05:38,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:05:38,883 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:05:38,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:05:38,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:05:38,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:05:38,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:05:38,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:05:38,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:38,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:05:38,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:05:38,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:05:38,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:05:38,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:05:38,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2021-12-16 06:05:39,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:05:39,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:05:39,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:05:39,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:05:39,111 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:05:39,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-12-16 06:05:39,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0cd46fd/7bdce52335a043dd9dd3f050645bd6ea/FLAG02d813048 [2021-12-16 06:05:39,552 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:05:39,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-12-16 06:05:39,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0cd46fd/7bdce52335a043dd9dd3f050645bd6ea/FLAG02d813048 [2021-12-16 06:05:39,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0cd46fd/7bdce52335a043dd9dd3f050645bd6ea [2021-12-16 06:05:39,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:05:39,575 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:05:39,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:39,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:05:39,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:05:39,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60604918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39, skipping insertion in model container [2021-12-16 06:05:39,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:05:39,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:05:39,844 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-12-16 06:05:39,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:39,850 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:05:39,881 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-12-16 06:05:39,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:39,898 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:05:39,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39 WrapperNode [2021-12-16 06:05:39,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:39,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:39,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:05:39,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:05:39,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,938 INFO L137 Inliner]: procedures = 128, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2021-12-16 06:05:39,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:39,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:05:39,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:05:39,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:05:39,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:05:39,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:05:39,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:05:39,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:05:39,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:40,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:40,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:40,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 06:05:40,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 06:05:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-16 06:05:40,100 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 06:05:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:05:40,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:05:40,184 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:05:40,186 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:05:40,414 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:05:40,419 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:05:40,419 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 06:05:40,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:40 BoogieIcfgContainer [2021-12-16 06:05:40,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:05:40,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:05:40,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:05:40,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:05:40,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:05:39" (1/3) ... [2021-12-16 06:05:40,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b73a9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:40, skipping insertion in model container [2021-12-16 06:05:40,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (2/3) ... [2021-12-16 06:05:40,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b73a9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:40, skipping insertion in model container [2021-12-16 06:05:40,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:40" (3/3) ... [2021-12-16 06:05:40,430 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2021-12-16 06:05:40,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:05:40,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2021-12-16 06:05:40,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:05:40,466 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 [2021-12-16 06:05:40,466 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-12-16 06:05:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:40,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:40,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:40,491 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951417, now seen corresponding path program 1 times [2021-12-16 06:05:40,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601113580] [2021-12-16 06:05:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:40,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:40,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:40,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601113580] [2021-12-16 06:05:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601113580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:40,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:40,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:40,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043958400] [2021-12-16 06:05:40,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:40,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:40,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:40,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:40,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:40,699 INFO L87 Difference]: Start difference. First operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:40,823 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2021-12-16 06:05:40,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 06:05:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:40,832 INFO L225 Difference]: With dead ends: 97 [2021-12-16 06:05:40,832 INFO L226 Difference]: Without dead ends: 94 [2021-12-16 06:05:40,833 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 [2021-12-16 06:05:40,837 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:40,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-16 06:05:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-16 06:05:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:40,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-12-16 06:05:40,875 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 7 [2021-12-16 06:05:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:40,875 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-12-16 06:05:40,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-12-16 06:05:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:40,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:40,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:40,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 06:05:40,876 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951418, now seen corresponding path program 1 times [2021-12-16 06:05:40,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:40,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079819747] [2021-12-16 06:05:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:40,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:40,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:40,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:40,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079819747] [2021-12-16 06:05:40,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079819747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:40,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:40,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:40,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308658987] [2021-12-16 06:05:40,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:40,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:40,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:40,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:40,946 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:41,005 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-12-16 06:05:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:41,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 06:05:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:41,006 INFO L225 Difference]: With dead ends: 92 [2021-12-16 06:05:41,006 INFO L226 Difference]: Without dead ends: 92 [2021-12-16 06:05:41,007 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 [2021-12-16 06:05:41,008 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:41,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-16 06:05:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-16 06:05:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-12-16 06:05:41,014 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 7 [2021-12-16 06:05:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:41,014 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-12-16 06:05:41,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:41,015 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-12-16 06:05:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:41,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:41,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:41,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 06:05:41,016 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:41,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390976, now seen corresponding path program 1 times [2021-12-16 06:05:41,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:41,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504787361] [2021-12-16 06:05:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:41,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504787361] [2021-12-16 06:05:41,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504787361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:41,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:41,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:05:41,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198360415] [2021-12-16 06:05:41,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:41,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:05:41,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:05:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:41,101 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:41,241 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-16 06:05:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:05:41,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:41,243 INFO L225 Difference]: With dead ends: 96 [2021-12-16 06:05:41,243 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 06:05:41,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:05:41,244 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:41,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 369 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:41,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 06:05:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-12-16 06:05:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-16 06:05:41,251 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 13 [2021-12-16 06:05:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:41,251 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-16 06:05:41,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-16 06:05:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:41,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:41,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:41,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 06:05:41,253 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:41,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390975, now seen corresponding path program 1 times [2021-12-16 06:05:41,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:41,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431419228] [2021-12-16 06:05:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:41,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431419228] [2021-12-16 06:05:41,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431419228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:41,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:41,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:05:41,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856387674] [2021-12-16 06:05:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:41,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:05:41,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:41,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:05:41,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:41,354 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:41,502 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-12-16 06:05:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:05:41,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:41,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:41,505 INFO L225 Difference]: With dead ends: 95 [2021-12-16 06:05:41,505 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 06:05:41,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:05:41,513 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 9 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:41,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 385 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 06:05:41,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2021-12-16 06:05:41,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-12-16 06:05:41,525 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 13 [2021-12-16 06:05:41,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:41,525 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-12-16 06:05:41,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-12-16 06:05:41,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 06:05:41,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:41,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:41,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 06:05:41,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2068593344, now seen corresponding path program 1 times [2021-12-16 06:05:41,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:41,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910003854] [2021-12-16 06:05:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 06:05:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:41,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910003854] [2021-12-16 06:05:41,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910003854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:41,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:41,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:05:41,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097321220] [2021-12-16 06:05:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:41,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:05:41,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:05:41,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:41,573 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:41,625 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2021-12-16 06:05:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:05:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 06:05:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:41,626 INFO L225 Difference]: With dead ends: 96 [2021-12-16 06:05:41,626 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 06:05:41,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:41,631 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:41,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 06:05:41,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-12-16 06:05:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-16 06:05:41,636 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 15 [2021-12-16 06:05:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:41,637 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-16 06:05:41,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-16 06:05:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 06:05:41,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:41,638 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:41,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 06:05:41,638 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1769802942, now seen corresponding path program 1 times [2021-12-16 06:05:41,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:41,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692843068] [2021-12-16 06:05:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 06:05:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:05:41,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692843068] [2021-12-16 06:05:41,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692843068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:41,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788174409] [2021-12-16 06:05:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:41,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:41,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 06:05:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:41,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:05:41,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788174409] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:05:41,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:05:41,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-16 06:05:41,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253842091] [2021-12-16 06:05:41,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:41,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:41,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:41,922 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:42,000 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2021-12-16 06:05:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-16 06:05:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:42,001 INFO L225 Difference]: With dead ends: 97 [2021-12-16 06:05:42,001 INFO L226 Difference]: Without dead ends: 97 [2021-12-16 06:05:42,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:42,002 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 8 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:42,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 323 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-16 06:05:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-12-16 06:05:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 92 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-12-16 06:05:42,006 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 28 [2021-12-16 06:05:42,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:42,006 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-12-16 06:05:42,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-12-16 06:05:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:05:42,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:42,007 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:42,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:42,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 06:05:42,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash -888530816, now seen corresponding path program 2 times [2021-12-16 06:05:42,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:42,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879617986] [2021-12-16 06:05:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:42,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 06:05:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 06:05:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 06:05:42,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:42,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879617986] [2021-12-16 06:05:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879617986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:42,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630710259] [2021-12-16 06:05:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:42,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:42,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:42,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:42,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 06:05:42,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:42,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-16 06:05:42,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:42,584 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 [2021-12-16 06:05:42,615 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 5 treesize of output 3 [2021-12-16 06:05:42,677 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:42,678 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 12 treesize of output 14 [2021-12-16 06:05:42,723 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 5 treesize of output 3 [2021-12-16 06:05:42,763 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:42,763 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 12 treesize of output 14 [2021-12-16 06:05:42,825 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 5 treesize of output 3 [2021-12-16 06:05:42,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 28491 column 46: unknown constant v_#valid_BEFORE_CALL_6 [2021-12-16 06:05:42,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:05:42,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-16 06:05:42,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817657064] [2021-12-16 06:05:42,955 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:42,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 06:05:42,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:42,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 06:05:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-16 06:05:42,956 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 06:05:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 06:05:42,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-16 06:05:42,957 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:42,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:42,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:43,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-16 06:05:43,168 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2455538b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-16 06:05:43,171 INFO L158 Benchmark]: Toolchain (without parser) took 3595.97ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 77.2MB in the beginning and 81.5MB in the end (delta: -4.3MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2021-12-16 06:05:43,171 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory was 35.4MB in the beginning and 35.4MB in the end (delta: 31.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:05:43,171 INFO L158 Benchmark]: CACSL2BoogieTranslator took 322.31ms. Allocated memory is still 113.2MB. Free memory was 77.0MB in the beginning and 79.8MB in the end (delta: -2.8MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2021-12-16 06:05:43,171 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.28ms. Allocated memory is still 113.2MB. Free memory was 79.8MB in the beginning and 77.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:05:43,171 INFO L158 Benchmark]: Boogie Preprocessor took 44.60ms. Allocated memory is still 113.2MB. Free memory was 77.2MB in the beginning and 75.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:05:43,171 INFO L158 Benchmark]: RCFGBuilder took 435.78ms. Allocated memory is still 113.2MB. Free memory was 75.6MB in the beginning and 57.3MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-16 06:05:43,172 INFO L158 Benchmark]: TraceAbstraction took 2748.88ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 56.7MB in the beginning and 81.5MB in the end (delta: -24.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-16 06:05:43,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory was 35.4MB in the beginning and 35.4MB in the end (delta: 31.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 322.31ms. Allocated memory is still 113.2MB. Free memory was 77.0MB in the beginning and 79.8MB in the end (delta: -2.8MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.28ms. Allocated memory is still 113.2MB. Free memory was 79.8MB in the beginning and 77.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.60ms. Allocated memory is still 113.2MB. Free memory was 77.2MB in the beginning and 75.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 435.78ms. Allocated memory is still 113.2MB. Free memory was 75.6MB in the beginning and 57.3MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 2748.88ms. Allocated memory was 113.2MB in the beginning and 151.0MB in the end (delta: 37.7MB). Free memory was 56.7MB in the beginning and 81.5MB in the end (delta: -24.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2455538b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@2455538b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-16 06:05:43,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:05:44,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:05:44,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:05:44,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:05:44,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:05:44,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:05:44,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:05:44,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:05:44,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:05:44,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:05:44,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:05:44,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:05:44,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:05:44,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:05:44,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:05:44,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:05:44,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:05:44,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:05:44,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:05:44,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:05:44,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:05:44,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:05:44,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:05:44,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:05:44,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:05:44,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:05:44,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:05:44,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:05:44,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:05:44,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:05:44,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:05:44,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:05:44,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:05:44,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:05:44,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:05:44,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:05:44,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:05:44,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:05:44,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:05:44,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:05:44,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:05:44,991 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 06:05:45,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:05:45,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:05:45,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:05:45,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:05:45,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:05:45,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:05:45,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:05:45,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:05:45,019 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:05:45,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:05:45,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:05:45,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:05:45,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:05:45,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:05:45,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:05:45,020 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:05:45,020 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:05:45,021 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:05:45,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:05:45,021 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:05:45,021 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 06:05:45,021 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 06:05:45,021 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:05:45,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:05:45,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:05:45,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:05:45,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:05:45,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:45,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:05:45,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:05:45,023 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 06:05:45,023 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:45,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:05:45,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 06:05:45,023 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383c6933c6ab916f651364224af1d774f30e162ad506fd2f28fe7f76c4487ba3 [2021-12-16 06:05:45,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:05:45,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:05:45,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:05:45,310 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:05:45,311 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:05:45,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-12-16 06:05:45,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a9b547f/19fa924d130f4f0782716516a51bffb3/FLAG91fa565c0 [2021-12-16 06:05:45,787 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:05:45,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i [2021-12-16 06:05:45,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a9b547f/19fa924d130f4f0782716516a51bffb3/FLAG91fa565c0 [2021-12-16 06:05:45,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a9b547f/19fa924d130f4f0782716516a51bffb3 [2021-12-16 06:05:45,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:05:45,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:05:45,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:45,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:05:45,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:05:45,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:45" (1/1) ... [2021-12-16 06:05:45,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23bec623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:45, skipping insertion in model container [2021-12-16 06:05:45,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:45" (1/1) ... [2021-12-16 06:05:45,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:05:45,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:05:46,145 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-12-16 06:05:46,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:46,161 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:05:46,201 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_unequal.i[24620,24633] [2021-12-16 06:05:46,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:46,236 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:05:46,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46 WrapperNode [2021-12-16 06:05:46,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:46,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:46,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:05:46,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:05:46,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,269 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,296 INFO L137 Inliner]: procedures = 131, calls = 36, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2021-12-16 06:05:46,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:46,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:05:46,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:05:46,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:05:46,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:05:46,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:05:46,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:05:46,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:05:46,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (1/1) ... [2021-12-16 06:05:46,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:46,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:46,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 06:05:46,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 06:05:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 06:05:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-16 06:05:46,434 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-16 06:05:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:05:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:05:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:05:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:05:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:05:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:05:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 06:05:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:05:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 06:05:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:05:46,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:05:46,555 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:05:46,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:05:46,999 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:05:47,003 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:05:47,004 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-16 06:05:47,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:47 BoogieIcfgContainer [2021-12-16 06:05:47,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:05:47,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:05:47,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:05:47,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:05:47,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:05:45" (1/3) ... [2021-12-16 06:05:47,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b551c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:47, skipping insertion in model container [2021-12-16 06:05:47,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:46" (2/3) ... [2021-12-16 06:05:47,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b551c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:47, skipping insertion in model container [2021-12-16 06:05:47,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:47" (3/3) ... [2021-12-16 06:05:47,023 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_unequal.i [2021-12-16 06:05:47,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:05:47,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2021-12-16 06:05:47,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:05:47,110 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 [2021-12-16 06:05:47,110 INFO L340 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2021-12-16 06:05:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:47,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:47,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:47,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:47,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951417, now seen corresponding path program 1 times [2021-12-16 06:05:47,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:47,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954551917] [2021-12-16 06:05:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:47,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:47,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:47,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 06:05:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:47,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:05:47,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:47,311 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 [2021-12-16 06:05:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:47,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:47,327 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:47,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954551917] [2021-12-16 06:05:47,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954551917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:47,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:47,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:47,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909757763] [2021-12-16 06:05:47,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:47,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:47,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:47,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:47,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:47,358 INFO L87 Difference]: Start difference. First operand has 99 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 95 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:47,527 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2021-12-16 06:05:47,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 06:05:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:47,534 INFO L225 Difference]: With dead ends: 97 [2021-12-16 06:05:47,535 INFO L226 Difference]: Without dead ends: 94 [2021-12-16 06:05:47,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:47,541 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:47,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 158 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-16 06:05:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-16 06:05:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-12-16 06:05:47,593 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 7 [2021-12-16 06:05:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:47,594 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-12-16 06:05:47,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-12-16 06:05:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:47,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:47,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:47,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:47,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:47,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1814951418, now seen corresponding path program 1 times [2021-12-16 06:05:47,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:47,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131716454] [2021-12-16 06:05:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:47,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:47,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:47,818 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:47,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 06:05:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:47,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:05:47,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:47,886 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 [2021-12-16 06:05:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:47,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:47,909 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131716454] [2021-12-16 06:05:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131716454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:47,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:47,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:47,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072588793] [2021-12-16 06:05:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:47,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:47,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:47,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:47,918 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:48,033 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-12-16 06:05:48,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 06:05:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:48,034 INFO L225 Difference]: With dead ends: 92 [2021-12-16 06:05:48,034 INFO L226 Difference]: Without dead ends: 92 [2021-12-16 06:05:48,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:48,035 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:48,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 158 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-16 06:05:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-12-16 06:05:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-12-16 06:05:48,040 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 7 [2021-12-16 06:05:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:48,040 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-12-16 06:05:48,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-12-16 06:05:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:48,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:48,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:48,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:48,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:48,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:48,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390976, now seen corresponding path program 1 times [2021-12-16 06:05:48,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:48,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165960373] [2021-12-16 06:05:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:48,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:48,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:48,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 06:05:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:05:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:48,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:05:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:48,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:48,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165960373] [2021-12-16 06:05:48,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165960373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:48,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:48,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:05:48,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901981813] [2021-12-16 06:05:48,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:48,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:48,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:48,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:48,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:48,375 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:48,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:48,633 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-16 06:05:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:48,635 INFO L225 Difference]: With dead ends: 96 [2021-12-16 06:05:48,635 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 06:05:48,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:48,636 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 10 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:48,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 329 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:05:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 06:05:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-12-16 06:05:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-16 06:05:48,641 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 13 [2021-12-16 06:05:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:48,642 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-16 06:05:48,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-16 06:05:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:48,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:48,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:48,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:48,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:48,851 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1506390975, now seen corresponding path program 1 times [2021-12-16 06:05:48,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:48,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472341679] [2021-12-16 06:05:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:48,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:48,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:48,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 06:05:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 06:05:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:48,933 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 [2021-12-16 06:05:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:48,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:48,999 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472341679] [2021-12-16 06:05:49,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472341679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:49,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:49,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:05:49,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185926404] [2021-12-16 06:05:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:49,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:49,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:49,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:49,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:49,001 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:49,284 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-12-16 06:05:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:49,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:49,286 INFO L225 Difference]: With dead ends: 95 [2021-12-16 06:05:49,286 INFO L226 Difference]: Without dead ends: 95 [2021-12-16 06:05:49,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:49,287 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 9 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:49,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 345 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 06:05:49,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-16 06:05:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2021-12-16 06:05:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-12-16 06:05:49,291 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 13 [2021-12-16 06:05:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:49,292 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-12-16 06:05:49,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-12-16 06:05:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 06:05:49,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:49,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:49,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:49,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:49,499 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2068593344, now seen corresponding path program 1 times [2021-12-16 06:05:49,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:49,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792786715] [2021-12-16 06:05:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:49,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:49,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:49,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:49,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 06:05:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:49,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:05:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:49,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:49,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:49,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792786715] [2021-12-16 06:05:49,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792786715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:49,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:49,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:05:49,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174529426] [2021-12-16 06:05:49,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:49,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:49,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:49,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:49,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:49,597 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:49,606 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2021-12-16 06:05:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:49,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 06:05:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:49,608 INFO L225 Difference]: With dead ends: 96 [2021-12-16 06:05:49,608 INFO L226 Difference]: Without dead ends: 96 [2021-12-16 06:05:49,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:49,610 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 4 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:49,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 193 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-16 06:05:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2021-12-16 06:05:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-12-16 06:05:49,631 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 15 [2021-12-16 06:05:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:49,631 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-12-16 06:05:49,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-12-16 06:05:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 06:05:49,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:49,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:49,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:49,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:49,840 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1769802942, now seen corresponding path program 1 times [2021-12-16 06:05:49,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:49,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989753136] [2021-12-16 06:05:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:49,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:49,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:49,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:49,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 06:05:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:49,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:05:50,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989753136] [2021-12-16 06:05:50,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989753136] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:05:50,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:50,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 06:05:50,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458420709] [2021-12-16 06:05:50,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:50,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:50,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:50,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:50,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:50,053 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:50,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:50,076 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-12-16 06:05:50,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:50,076 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-16 06:05:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:50,077 INFO L225 Difference]: With dead ends: 102 [2021-12-16 06:05:50,077 INFO L226 Difference]: Without dead ends: 102 [2021-12-16 06:05:50,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:50,078 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 11 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:50,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 385 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-16 06:05:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-12-16 06:05:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 92 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-12-16 06:05:50,087 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 28 [2021-12-16 06:05:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:50,087 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-12-16 06:05:50,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-12-16 06:05:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:05:50,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:50,088 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:50,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:50,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:05:50,298 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:05:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash -888530816, now seen corresponding path program 2 times [2021-12-16 06:05:50,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:50,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139969515] [2021-12-16 06:05:50,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:50,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:50,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:50,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:05:50,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 06:05:50,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:50,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 06:05:50,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:50,464 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 [2021-12-16 06:05:50,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-16 06:05:50,648 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 06:05:50,648 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 20 treesize of output 27 [2021-12-16 06:05:50,687 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 8 treesize of output 6 [2021-12-16 06:05:50,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:50,796 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 15 treesize of output 17 [2021-12-16 06:05:50,887 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 8 treesize of output 6 [2021-12-16 06:05:53,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:53,095 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 15 treesize of output 17 [2021-12-16 06:05:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 6 refuted. 6 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:53,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:53,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:53,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139969515] [2021-12-16 06:05:53,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139969515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:53,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823885523] [2021-12-16 06:05:53,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:53,243 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:05:53,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:05:53,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-16 06:05:53,431 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 06:05:53,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908787161] [2021-12-16 06:05:53,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:53,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:53,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:53,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:53,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 06:05:53,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 1 [2021-12-16 06:05:53,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:53,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 06:05:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:53,602 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 [2021-12-16 06:05:55,747 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 06:05:55,748 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 20 treesize of output 27 [2021-12-16 06:05:59,918 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:05:59,918 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 15 treesize of output 20 [2021-12-16 06:06:02,050 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:06:02,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-16 06:06:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 10 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 06:06:02,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 06:06:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908787161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:06:02,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:06:02,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 18 [2021-12-16 06:06:02,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361402949] [2021-12-16 06:06:02,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:02,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 06:06:02,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:02,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 06:06:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=305, Unknown=4, NotChecked=0, Total=380 [2021-12-16 06:06:02,652 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 06:06:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:13,495 INFO L93 Difference]: Finished difference Result 166 states and 182 transitions. [2021-12-16 06:06:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 06:06:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2021-12-16 06:06:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:13,496 INFO L225 Difference]: With dead ends: 166 [2021-12-16 06:06:13,496 INFO L226 Difference]: Without dead ends: 166 [2021-12-16 06:06:13,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=126, Invalid=519, Unknown=5, NotChecked=0, Total=650 [2021-12-16 06:06:13,497 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 112 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:13,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 944 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 263 Invalid, 0 Unknown, 252 Unchecked, 0.3s Time] [2021-12-16 06:06:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-16 06:06:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 102. [2021-12-16 06:06:13,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 96 states have internal predecessors, (105), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:13,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-12-16 06:06:13,501 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 41 [2021-12-16 06:06:13,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:13,501 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-12-16 06:06:13,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 06:06:13,501 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-12-16 06:06:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:06:13,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:13,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:13,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:13,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:13,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:06:13,903 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:13,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:13,903 INFO L85 PathProgramCache]: Analyzing trace with hash -888530815, now seen corresponding path program 1 times [2021-12-16 06:06:13,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:13,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474802779] [2021-12-16 06:06:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:13,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:13,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:13,905 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:13,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 06:06:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 06:06:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:14,078 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 [2021-12-16 06:06:14,084 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 [2021-12-16 06:06:14,114 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 5 treesize of output 3 [2021-12-16 06:06:14,118 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 8 treesize of output 6 [2021-12-16 06:06:16,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:16,253 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 12 treesize of output 14 [2021-12-16 06:06:16,264 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:06:16,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-16 06:06:16,380 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 5 treesize of output 3 [2021-12-16 06:06:18,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:18,571 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 12 treesize of output 14 [2021-12-16 06:06:18,884 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:06:18,884 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 12 treesize of output 18 [2021-12-16 06:06:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:06:18,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:19,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474802779] [2021-12-16 06:06:19,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474802779] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [613731885] [2021-12-16 06:06:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:19,344 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:06:19,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:06:19,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-16 06:06:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:19,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 06:06:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:19,610 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 [2021-12-16 06:06:19,653 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 5 treesize of output 3 [2021-12-16 06:06:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:19,792 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 12 treesize of output 14 [2021-12-16 06:06:19,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-16 06:06:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:22,198 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 12 treesize of output 14 [2021-12-16 06:06:22,503 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 5 treesize of output 3 [2021-12-16 06:06:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:22,648 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 12 treesize of output 14 [2021-12-16 06:06:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 06:06:22,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:26,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [613731885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:26,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:06:26,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-12-16 06:06:26,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184624686] [2021-12-16 06:06:26,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:26,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 06:06:26,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:26,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 06:06:26,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=393, Unknown=5, NotChecked=0, Total=462 [2021-12-16 06:06:26,925 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 06:06:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:29,867 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-12-16 06:06:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 06:06:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-12-16 06:06:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:29,868 INFO L225 Difference]: With dead ends: 108 [2021-12-16 06:06:29,868 INFO L226 Difference]: Without dead ends: 108 [2021-12-16 06:06:29,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=106, Invalid=644, Unknown=6, NotChecked=0, Total=756 [2021-12-16 06:06:29,869 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 4 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:29,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 797 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 265 Unchecked, 0.5s Time] [2021-12-16 06:06:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-16 06:06:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-12-16 06:06:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 72 states have (on average 1.5277777777777777) internal successors, (110), 101 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2021-12-16 06:06:29,872 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 41 [2021-12-16 06:06:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:29,873 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2021-12-16 06:06:29,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 06:06:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2021-12-16 06:06:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:06:29,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:29,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:29,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:30,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:30,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:30,282 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash -338093919, now seen corresponding path program 1 times [2021-12-16 06:06:30,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106293256] [2021-12-16 06:06:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:30,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:30,285 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:30,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 06:06:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 06:06:30,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:30,646 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 [2021-12-16 06:06:30,781 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 6 treesize of output 5 [2021-12-16 06:06:30,918 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 12 treesize of output 8 [2021-12-16 06:06:31,277 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 06:06:31,277 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 24 treesize of output 35 [2021-12-16 06:06:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:31,289 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 28 [2021-12-16 06:06:31,404 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 29 treesize of output 17 [2021-12-16 06:06:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:06:31,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:31,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106293256] [2021-12-16 06:06:31,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106293256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1567035138] [2021-12-16 06:06:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:31,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:31,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:06:31,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:06:31,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-16 06:06:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:31,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 06:06:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:31,993 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 [2021-12-16 06:06:32,372 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 12 treesize of output 8 [2021-12-16 06:06:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:32,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-16 06:06:32,695 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 06:06:32,695 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 24 treesize of output 35 [2021-12-16 06:06:32,861 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 29 treesize of output 17 [2021-12-16 06:06:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:06:32,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:33,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1567035138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:33,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:06:33,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-12-16 06:06:33,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474161721] [2021-12-16 06:06:33,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:33,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 06:06:33,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 06:06:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=862, Unknown=3, NotChecked=0, Total=992 [2021-12-16 06:06:33,115 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand has 30 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:06:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:34,234 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2021-12-16 06:06:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 06:06:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-16 06:06:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:34,236 INFO L225 Difference]: With dead ends: 182 [2021-12-16 06:06:34,236 INFO L226 Difference]: Without dead ends: 182 [2021-12-16 06:06:34,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=233, Invalid=1565, Unknown=8, NotChecked=0, Total=1806 [2021-12-16 06:06:34,237 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 104 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:34,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 779 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 455 Invalid, 0 Unknown, 164 Unchecked, 0.7s Time] [2021-12-16 06:06:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-16 06:06:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 110. [2021-12-16 06:06:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.5405405405405406) internal successors, (114), 103 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-12-16 06:06:34,240 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 44 [2021-12-16 06:06:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:34,241 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-12-16 06:06:34,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:06:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-12-16 06:06:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:06:34,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:34,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:34,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:34,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-16 06:06:34,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:34,649 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash -338093918, now seen corresponding path program 1 times [2021-12-16 06:06:34,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187651176] [2021-12-16 06:06:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:34,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:34,651 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 06:06:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:34,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 06:06:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:34,985 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 [2021-12-16 06:06:35,140 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 6 treesize of output 5 [2021-12-16 06:06:35,149 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 6 treesize of output 5 [2021-12-16 06:06:35,293 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 9 treesize of output 5 [2021-12-16 06:06:35,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-16 06:06:35,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:35,718 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 16 treesize of output 18 [2021-12-16 06:06:35,744 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 06:06:35,744 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 [2021-12-16 06:06:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:35,757 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 14 treesize of output 16 [2021-12-16 06:06:35,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-16 06:06:35,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:06:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:06:36,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:36,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187651176] [2021-12-16 06:06:36,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187651176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952673706] [2021-12-16 06:06:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:36,901 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:06:36,902 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:06:36,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-16 06:06:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:37,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 06:06:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:37,422 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 [2021-12-16 06:06:37,427 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 [2021-12-16 06:06:38,055 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 22 treesize of output 14 [2021-12-16 06:06:38,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-16 06:06:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:38,810 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 28 [2021-12-16 06:06:38,833 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 06:06:38,833 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 18 treesize of output 18 [2021-12-16 06:06:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:38,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 06:06:38,857 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 [2021-12-16 06:06:39,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-16 06:06:39,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:06:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:06:39,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:40,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952673706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:40,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:06:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-12-16 06:06:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49680948] [2021-12-16 06:06:40,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:40,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 06:06:40,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 06:06:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1377, Unknown=27, NotChecked=0, Total=1560 [2021-12-16 06:06:40,237 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 35 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:06:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:42,196 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-12-16 06:06:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 06:06:42,196 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-16 06:06:42,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:42,197 INFO L225 Difference]: With dead ends: 127 [2021-12-16 06:06:42,197 INFO L226 Difference]: Without dead ends: 127 [2021-12-16 06:06:42,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=285, Invalid=2326, Unknown=41, NotChecked=0, Total=2652 [2021-12-16 06:06:42,198 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 60 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:42,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 753 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 292 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2021-12-16 06:06:42,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-16 06:06:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2021-12-16 06:06:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.527027027027027) internal successors, (113), 103 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2021-12-16 06:06:42,201 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 44 [2021-12-16 06:06:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:42,202 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2021-12-16 06:06:42,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:06:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2021-12-16 06:06:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 06:06:42,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:42,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:42,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:42,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-16 06:06:42,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:42,620 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:42,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:42,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1890978520, now seen corresponding path program 1 times [2021-12-16 06:06:42,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:42,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668502640] [2021-12-16 06:06:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:42,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:42,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:42,622 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:42,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-16 06:06:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:42,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:06:42,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 06:06:42,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:42,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:42,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668502640] [2021-12-16 06:06:42,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668502640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:42,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:42,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:06:42,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131614564] [2021-12-16 06:06:42,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:42,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:06:42,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:06:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:06:42,842 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:42,887 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2021-12-16 06:06:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:06:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-16 06:06:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:42,888 INFO L225 Difference]: With dead ends: 111 [2021-12-16 06:06:42,888 INFO L226 Difference]: Without dead ends: 111 [2021-12-16 06:06:42,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:06:42,889 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 81 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:42,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 186 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:06:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-16 06:06:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-12-16 06:06:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.5135135135135136) internal successors, (112), 103 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2021-12-16 06:06:42,892 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 45 [2021-12-16 06:06:42,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:42,892 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2021-12-16 06:06:42,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2021-12-16 06:06:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 06:06:42,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:42,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:42,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:43,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:43,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash -457619027, now seen corresponding path program 1 times [2021-12-16 06:06:43,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:43,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893558676] [2021-12-16 06:06:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:43,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:43,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:43,103 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:43,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-16 06:06:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:06:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 06:06:43,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 06:06:44,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:44,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893558676] [2021-12-16 06:06:44,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893558676] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:06:44,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:06:44,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-16 06:06:44,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230458908] [2021-12-16 06:06:44,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:44,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 06:06:44,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 06:06:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:06:44,140 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 06:06:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:44,182 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-12-16 06:06:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:06:44,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-12-16 06:06:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:44,183 INFO L225 Difference]: With dead ends: 107 [2021-12-16 06:06:44,183 INFO L226 Difference]: Without dead ends: 107 [2021-12-16 06:06:44,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 06:06:44,184 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 278 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:44,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 229 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:06:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-16 06:06:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-12-16 06:06:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 100 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2021-12-16 06:06:44,187 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 47 [2021-12-16 06:06:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:44,188 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2021-12-16 06:06:44,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 06:06:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2021-12-16 06:06:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 06:06:44,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:44,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:44,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:44,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:44,397 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289572, now seen corresponding path program 1 times [2021-12-16 06:06:44,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:44,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212613313] [2021-12-16 06:06:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:44,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:44,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:44,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:44,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-16 06:06:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:44,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:06:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 06:06:44,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:44,582 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:44,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212613313] [2021-12-16 06:06:44,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212613313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:44,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:44,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:06:44,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194927888] [2021-12-16 06:06:44,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:44,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:06:44,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:44,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:06:44,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:06:44,584 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:44,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:44,722 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-12-16 06:06:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:06:44,723 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-16 06:06:44,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:44,724 INFO L225 Difference]: With dead ends: 118 [2021-12-16 06:06:44,724 INFO L226 Difference]: Without dead ends: 118 [2021-12-16 06:06:44,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:06:44,726 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:44,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 145 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:06:44,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-16 06:06:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-12-16 06:06:44,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.4657534246575343) internal successors, (107), 99 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2021-12-16 06:06:44,729 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 48 [2021-12-16 06:06:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:44,729 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2021-12-16 06:06:44,730 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2021-12-16 06:06:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 06:06:44,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:44,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:44,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:44,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:44,931 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289571, now seen corresponding path program 1 times [2021-12-16 06:06:44,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:44,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285738354] [2021-12-16 06:06:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:44,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:44,932 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:44,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-16 06:06:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:06:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 06:06:45,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:45,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:45,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285738354] [2021-12-16 06:06:45,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285738354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:45,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:45,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:06:45,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307026731] [2021-12-16 06:06:45,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:45,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:06:45,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:06:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:06:45,188 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:45,449 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-12-16 06:06:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:06:45,450 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-16 06:06:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:45,451 INFO L225 Difference]: With dead ends: 105 [2021-12-16 06:06:45,451 INFO L226 Difference]: Without dead ends: 105 [2021-12-16 06:06:45,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:06:45,451 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 65 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:45,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 141 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:06:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-16 06:06:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-12-16 06:06:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.452054794520548) internal successors, (106), 98 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-12-16 06:06:45,454 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 48 [2021-12-16 06:06:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:45,454 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-12-16 06:06:45,454 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-12-16 06:06:45,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 06:06:45,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:45,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:45,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:45,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:45,663 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289412, now seen corresponding path program 1 times [2021-12-16 06:06:45,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166317173] [2021-12-16 06:06:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:45,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:45,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:45,665 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:45,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-16 06:06:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:45,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 06:06:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 06:06:45,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:45,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:45,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166317173] [2021-12-16 06:06:45,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166317173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:45,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:45,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:06:45,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060262083] [2021-12-16 06:06:45,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:45,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:06:45,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:06:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:06:45,869 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:45,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:45,989 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-12-16 06:06:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:06:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-16 06:06:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:45,990 INFO L225 Difference]: With dead ends: 116 [2021-12-16 06:06:45,990 INFO L226 Difference]: Without dead ends: 116 [2021-12-16 06:06:45,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:06:45,991 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:45,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 87 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:06:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-16 06:06:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2021-12-16 06:06:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 97 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:45,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2021-12-16 06:06:45,993 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 48 [2021-12-16 06:06:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:45,994 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2021-12-16 06:06:45,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:45,994 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2021-12-16 06:06:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 06:06:45,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:45,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:46,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-16 06:06:46,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:46,199 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1301289411, now seen corresponding path program 1 times [2021-12-16 06:06:46,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:46,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612544140] [2021-12-16 06:06:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:46,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:46,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:46,207 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:46,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-16 06:06:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:06:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 06:06:46,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:46,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612544140] [2021-12-16 06:06:46,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612544140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:46,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:46,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:06:46,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531616836] [2021-12-16 06:06:46,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:46,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:06:46,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:06:46,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:06:46,469 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:46,593 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2021-12-16 06:06:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:06:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-12-16 06:06:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:46,594 INFO L225 Difference]: With dead ends: 103 [2021-12-16 06:06:46,594 INFO L226 Difference]: Without dead ends: 103 [2021-12-16 06:06:46,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:06:46,594 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 200 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:46,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 94 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:06:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-16 06:06:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-12-16 06:06:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 73 states have (on average 1.4246575342465753) internal successors, (104), 96 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2021-12-16 06:06:46,597 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 48 [2021-12-16 06:06:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:46,597 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2021-12-16 06:06:46,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:46,597 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2021-12-16 06:06:46,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 06:06:46,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:46,598 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:46,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:46,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:46,802 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:46,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1685271039, now seen corresponding path program 1 times [2021-12-16 06:06:46,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:46,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005755007] [2021-12-16 06:06:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:46,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:46,804 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:46,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-16 06:06:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:46,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:06:46,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:47,007 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 [2021-12-16 06:06:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 06:06:47,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:47,070 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:47,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005755007] [2021-12-16 06:06:47,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005755007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:47,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:47,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:06:47,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408341193] [2021-12-16 06:06:47,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:47,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:06:47,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:47,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:06:47,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:06:47,072 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:47,429 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2021-12-16 06:06:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:06:47,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-16 06:06:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:47,430 INFO L225 Difference]: With dead ends: 114 [2021-12-16 06:06:47,430 INFO L226 Difference]: Without dead ends: 114 [2021-12-16 06:06:47,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:06:47,431 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 59 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:47,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 225 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 06:06:47,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-16 06:06:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2021-12-16 06:06:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 95 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2021-12-16 06:06:47,434 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 49 [2021-12-16 06:06:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:47,434 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2021-12-16 06:06:47,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2021-12-16 06:06:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 06:06:47,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:47,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:47,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:47,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:47,643 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1685271038, now seen corresponding path program 1 times [2021-12-16 06:06:47,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:47,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275839508] [2021-12-16 06:06:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:47,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:47,645 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:47,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-16 06:06:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 06:06:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:47,842 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 [2021-12-16 06:06:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 06:06:47,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:47,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:47,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275839508] [2021-12-16 06:06:47,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275839508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:47,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:47,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:06:47,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618120516] [2021-12-16 06:06:47,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:47,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:06:47,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:06:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:06:47,961 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:48,280 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2021-12-16 06:06:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:06:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-16 06:06:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:48,282 INFO L225 Difference]: With dead ends: 101 [2021-12-16 06:06:48,282 INFO L226 Difference]: Without dead ends: 101 [2021-12-16 06:06:48,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:06:48,282 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 61 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:48,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 228 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 06:06:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-16 06:06:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-16 06:06:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 94 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2021-12-16 06:06:48,285 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 49 [2021-12-16 06:06:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:48,285 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2021-12-16 06:06:48,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 06:06:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2021-12-16 06:06:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 06:06:48,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:48,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:48,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:48,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:48,495 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:48,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:48,496 INFO L85 PathProgramCache]: Analyzing trace with hash -342796830, now seen corresponding path program 1 times [2021-12-16 06:06:48,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:48,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143376344] [2021-12-16 06:06:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:48,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:48,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:48,497 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:48,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-16 06:06:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:48,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:06:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 06:06:48,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:48,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:48,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143376344] [2021-12-16 06:06:48,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143376344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:48,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:48,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:06:48,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103801221] [2021-12-16 06:06:48,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:48,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:06:48,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:48,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:06:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:06:48,733 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:48,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:48,846 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-12-16 06:06:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:06:48,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-16 06:06:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:48,847 INFO L225 Difference]: With dead ends: 112 [2021-12-16 06:06:48,847 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 06:06:48,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:06:48,847 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:48,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 100 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:06:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 06:06:48,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 100. [2021-12-16 06:06:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 93 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-12-16 06:06:48,850 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 51 [2021-12-16 06:06:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:48,850 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-12-16 06:06:48,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-12-16 06:06:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 06:06:48,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:48,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:48,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:49,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:49,059 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:49,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:49,060 INFO L85 PathProgramCache]: Analyzing trace with hash -342796829, now seen corresponding path program 1 times [2021-12-16 06:06:49,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955695300] [2021-12-16 06:06:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:49,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:49,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:49,061 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:49,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-16 06:06:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 06:06:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 06:06:49,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:06:49,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955695300] [2021-12-16 06:06:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955695300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:06:49,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:06:49,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:06:49,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922506301] [2021-12-16 06:06:49,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:06:49,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 06:06:49,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:49,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 06:06:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:06:49,383 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:49,516 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-12-16 06:06:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:06:49,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-16 06:06:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:49,517 INFO L225 Difference]: With dead ends: 98 [2021-12-16 06:06:49,517 INFO L226 Difference]: Without dead ends: 98 [2021-12-16 06:06:49,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:06:49,518 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 179 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:49,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 87 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:06:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-16 06:06:49,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-16 06:06:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.356164383561644) internal successors, (99), 91 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2021-12-16 06:06:49,521 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 51 [2021-12-16 06:06:49,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:49,521 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2021-12-16 06:06:49,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:06:49,521 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2021-12-16 06:06:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 06:06:49,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:49,522 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:49,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:49,722 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 35 more)] === [2021-12-16 06:06:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:49,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1171904341, now seen corresponding path program 1 times [2021-12-16 06:06:49,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:49,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295425404] [2021-12-16 06:06:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:49,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:49,724 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:49,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-16 06:06:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:49,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 06:06:50,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:50,272 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 6 treesize of output 5 [2021-12-16 06:06:50,481 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 16 treesize of output 8 [2021-12-16 06:06:50,757 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_52 (_ BitVec 32))) (and (bvult v_arrayElimCell_52 |c_#StackHeapBarrier|) (not (= (_ bv0 32) v_arrayElimCell_52)))) (exists ((v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1356))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (not (= (_ bv0 32) (bvadd |c_#StackHeapBarrier| (_ bv1 32))))) is different from true [2021-12-16 06:06:50,781 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_arrayElimCell_52 (_ BitVec 32))) (and (bvult v_arrayElimCell_52 |c_#StackHeapBarrier|) (not (= (_ bv0 32) v_arrayElimCell_52)))) (exists ((v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_1356))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (not (= (_ bv0 32) (bvadd |c_#StackHeapBarrier| (_ bv1 32))))) is different from true [2021-12-16 06:06:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:50,836 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 22 treesize of output 22 [2021-12-16 06:06:51,746 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:06:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2021-12-16 06:06:51,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:51,897 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 22 treesize of output 22