./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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/verifythis/elimination_max_rec_onepoint.c -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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:35:23,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:35:23,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:35:23,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:35:23,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:35:23,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:35:23,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:35:23,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:35:23,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:35:23,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:35:23,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:35:23,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:35:23,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:35:23,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:35:23,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:35:23,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:35:23,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:35:23,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:35:23,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:35:23,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:35:23,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:35:23,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:35:23,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:35:23,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:35:23,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:35:23,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:35:23,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:35:23,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:35:23,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:35:23,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:35:23,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:35:23,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:35:23,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:35:23,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:35:23,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:35:23,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:35:23,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:35:23,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:35:23,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:35:23,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:35:23,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:35:23,113 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:35:23,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:35:23,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:35:23,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:35:23,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:35:23,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:35:23,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:35:23,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:35:23,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:35:23,142 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:35:23,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:35:23,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:35:23,143 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:35:23,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:35:23,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:35:23,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:35:23,143 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:35:23,143 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:35:23,143 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:35:23,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:35:23,144 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:35:23,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:35:23,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:35:23,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:35:23,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:35:23,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:35:23,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:35:23,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:35:23,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:35:23,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:35:23,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:35:23,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:35:23,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2021-12-14 19:35:23,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:35:23,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:35:23,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:35:23,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:35:23,354 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:35:23,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-12-14 19:35:23,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206b60f29/336aba4467034f97bbda44aa20995a95/FLAG32b616a3e [2021-12-14 19:35:23,783 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:35:23,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-12-14 19:35:23,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206b60f29/336aba4467034f97bbda44aa20995a95/FLAG32b616a3e [2021-12-14 19:35:23,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/206b60f29/336aba4467034f97bbda44aa20995a95 [2021-12-14 19:35:23,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:35:23,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:35:23,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:35:23,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:35:23,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:35:23,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:23" (1/1) ... [2021-12-14 19:35:23,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7259a2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:23, skipping insertion in model container [2021-12-14 19:35:23,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:35:23" (1/1) ... [2021-12-14 19:35:23,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:35:23,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:35:23,976 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/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-12-14 19:35:24,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:35:24,009 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:35:24,018 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/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-12-14 19:35:24,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:35:24,047 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:35:24,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24 WrapperNode [2021-12-14 19:35:24,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:35:24,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:35:24,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:35:24,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:35:24,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,083 INFO L137 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2021-12-14 19:35:24,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:35:24,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:35:24,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:35:24,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:35:24,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:35:24,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:35:24,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:35:24,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:35:24,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (1/1) ... [2021-12-14 19:35:24,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:35:24,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:24,149 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) [2021-12-14 19:35:24,165 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 [2021-12-14 19:35:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 19:35:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 19:35:24,225 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 19:35:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 19:35:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-12-14 19:35:24,226 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-12-14 19:35:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 19:35:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:35:24,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:35:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:35:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 19:35:24,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 19:35:24,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:35:24,304 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:35:24,305 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:35:24,536 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:35:24,540 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:35:24,540 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 19:35:24,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:24 BoogieIcfgContainer [2021-12-14 19:35:24,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:35:24,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:35:24,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:35:24,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:35:24,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:35:23" (1/3) ... [2021-12-14 19:35:24,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f81d20d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:24, skipping insertion in model container [2021-12-14 19:35:24,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:35:24" (2/3) ... [2021-12-14 19:35:24,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f81d20d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:35:24, skipping insertion in model container [2021-12-14 19:35:24,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:35:24" (3/3) ... [2021-12-14 19:35:24,547 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-12-14 19:35:24,550 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:35:24,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-12-14 19:35:24,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:35:24,581 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 [2021-12-14 19:35:24,581 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-12-14 19:35:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 35 states have (on average 1.6) internal successors, (56), 52 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 19:35:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:35:24,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:24,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:24,597 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash -724999257, now seen corresponding path program 1 times [2021-12-14 19:35:24,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:24,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598986277] [2021-12-14 19:35:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:24,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:24,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:24,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:35:24,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:24,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598986277] [2021-12-14 19:35:24,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598986277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:24,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:24,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:35:24,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149272828] [2021-12-14 19:35:24,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:24,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 19:35:24,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:24,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 19:35:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 19:35:24,802 INFO L87 Difference]: Start difference. First operand has 64 states, 35 states have (on average 1.6) internal successors, (56), 52 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:35:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:24,818 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-12-14 19:35:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 19:35:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-12-14 19:35:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:24,826 INFO L225 Difference]: With dead ends: 64 [2021-12-14 19:35:24,826 INFO L226 Difference]: Without dead ends: 62 [2021-12-14 19:35:24,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 19:35:24,833 INFO L933 BasicCegarLoop]: 70 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, 70 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:24,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-14 19:35:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-14 19:35:24,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 50 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 19:35:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-14 19:35:24,866 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 22 [2021-12-14 19:35:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:24,866 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-14 19:35:24,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 19:35:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-14 19:35:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:35:24,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:24,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:24,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:35:24,870 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1833988771, now seen corresponding path program 1 times [2021-12-14 19:35:24,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:24,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613467342] [2021-12-14 19:35:24,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:24,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:35:25,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:25,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613467342] [2021-12-14 19:35:25,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613467342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:25,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:25,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:35:25,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9703652] [2021-12-14 19:35:25,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:25,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:35:25,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:35:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:35:25,041 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:35:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:25,184 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2021-12-14 19:35:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:35:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-12-14 19:35:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:25,187 INFO L225 Difference]: With dead ends: 106 [2021-12-14 19:35:25,187 INFO L226 Difference]: Without dead ends: 106 [2021-12-14 19:35:25,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:35:25,189 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 47 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:25,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 325 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:25,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-14 19:35:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-12-14 19:35:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 50 states have (on average 1.56) internal successors, (78), 67 states have internal predecessors, (78), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-14 19:35:25,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2021-12-14 19:35:25,212 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 22 [2021-12-14 19:35:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:25,213 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2021-12-14 19:35:25,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 19:35:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2021-12-14 19:35:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:35:25,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:25,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:25,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:35:25,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:25,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1832511589, now seen corresponding path program 1 times [2021-12-14 19:35:25,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:25,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185713363] [2021-12-14 19:35:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:25,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:35:25,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:25,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185713363] [2021-12-14 19:35:25,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185713363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:25,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:25,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:35:25,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083595060] [2021-12-14 19:35:25,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:25,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:25,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:25,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:25,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:25,281 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:25,316 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-12-14 19:35:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:35:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-12-14 19:35:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:25,318 INFO L225 Difference]: With dead ends: 82 [2021-12-14 19:35:25,318 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 19:35:25,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:35:25,319 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:25,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 129 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 19:35:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-14 19:35:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.5) internal successors, (75), 64 states have internal predecessors, (75), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-14 19:35:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2021-12-14 19:35:25,325 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 22 [2021-12-14 19:35:25,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:25,325 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2021-12-14 19:35:25,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2021-12-14 19:35:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 19:35:25,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:25,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:25,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:35:25,327 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1832511590, now seen corresponding path program 1 times [2021-12-14 19:35:25,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:25,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874616311] [2021-12-14 19:35:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:25,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:35:25,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874616311] [2021-12-14 19:35:25,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874616311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:25,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:25,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:35:25,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21704586] [2021-12-14 19:35:25,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:25,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:35:25,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:35:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:35:25,424 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:25,501 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-12-14 19:35:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:35:25,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-12-14 19:35:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:25,502 INFO L225 Difference]: With dead ends: 80 [2021-12-14 19:35:25,502 INFO L226 Difference]: Without dead ends: 80 [2021-12-14 19:35:25,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:35:25,503 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:25,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 244 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-14 19:35:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-14 19:35:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.46) internal successors, (73), 62 states have internal predecessors, (73), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-14 19:35:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2021-12-14 19:35:25,508 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 22 [2021-12-14 19:35:25,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:25,508 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2021-12-14 19:35:25,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2021-12-14 19:35:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:35:25,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:25,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:25,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:35:25,510 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:25,510 INFO L85 PathProgramCache]: Analyzing trace with hash 107045159, now seen corresponding path program 1 times [2021-12-14 19:35:25,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683793063] [2021-12-14 19:35:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:25,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:35:25,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:25,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683793063] [2021-12-14 19:35:25,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683793063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:25,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:25,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 19:35:25,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086715802] [2021-12-14 19:35:25,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:25,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:35:25,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:35:25,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:35:25,609 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:25,703 INFO L93 Difference]: Finished difference Result 119 states and 151 transitions. [2021-12-14 19:35:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:35:25,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-12-14 19:35:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:25,704 INFO L225 Difference]: With dead ends: 119 [2021-12-14 19:35:25,704 INFO L226 Difference]: Without dead ends: 119 [2021-12-14 19:35:25,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:35:25,705 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 79 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:25,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 263 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-14 19:35:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 86. [2021-12-14 19:35:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 67 states have internal predecessors, (78), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-14 19:35:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2021-12-14 19:35:25,715 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 24 [2021-12-14 19:35:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:25,716 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2021-12-14 19:35:25,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:25,716 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2021-12-14 19:35:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 19:35:25,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:25,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:25,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:35:25,717 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1801661154, now seen corresponding path program 1 times [2021-12-14 19:35:25,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:25,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081639910] [2021-12-14 19:35:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:25,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:35:25,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:25,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081639910] [2021-12-14 19:35:25,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081639910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:25,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:25,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-14 19:35:25,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117595174] [2021-12-14 19:35:25,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:25,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 19:35:25,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:25,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 19:35:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:35:25,877 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:26,004 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-12-14 19:35:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:35:26,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-12-14 19:35:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:26,005 INFO L225 Difference]: With dead ends: 90 [2021-12-14 19:35:26,005 INFO L226 Difference]: Without dead ends: 90 [2021-12-14 19:35:26,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:35:26,006 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 43 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:26,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 420 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-14 19:35:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-14 19:35:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.396551724137931) internal successors, (81), 70 states have internal predecessors, (81), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-14 19:35:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2021-12-14 19:35:26,011 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 29 [2021-12-14 19:35:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:26,011 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2021-12-14 19:35:26,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 19:35:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2021-12-14 19:35:26,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 19:35:26,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:26,012 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:26,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 19:35:26,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:26,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1023324068, now seen corresponding path program 1 times [2021-12-14 19:35:26,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:26,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746360367] [2021-12-14 19:35:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:26,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:26,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:26,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746360367] [2021-12-14 19:35:26,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746360367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:26,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:26,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:35:26,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521049616] [2021-12-14 19:35:26,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:26,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:35:26,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:26,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:35:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:35:26,092 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:26,264 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2021-12-14 19:35:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:35:26,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-12-14 19:35:26,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:26,265 INFO L225 Difference]: With dead ends: 110 [2021-12-14 19:35:26,266 INFO L226 Difference]: Without dead ends: 110 [2021-12-14 19:35:26,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:35:26,266 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 79 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:26,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 201 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-14 19:35:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-12-14 19:35:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 70 states have internal predecessors, (80), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-14 19:35:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2021-12-14 19:35:26,271 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 30 [2021-12-14 19:35:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:26,271 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2021-12-14 19:35:26,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2021-12-14 19:35:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-14 19:35:26,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:26,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:26,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:35:26,273 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1023324067, now seen corresponding path program 1 times [2021-12-14 19:35:26,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460314136] [2021-12-14 19:35:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:26,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:26,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:26,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460314136] [2021-12-14 19:35:26,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460314136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:26,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:26,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:35:26,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62096492] [2021-12-14 19:35:26,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:26,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:35:26,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:26,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:35:26,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:35:26,317 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:26,384 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-12-14 19:35:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:35:26,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-12-14 19:35:26,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:26,385 INFO L225 Difference]: With dead ends: 86 [2021-12-14 19:35:26,385 INFO L226 Difference]: Without dead ends: 86 [2021-12-14 19:35:26,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:35:26,386 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 54 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:26,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 121 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:26,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-14 19:35:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-14 19:35:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 66 states have internal predecessors, (72), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-14 19:35:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2021-12-14 19:35:26,389 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 30 [2021-12-14 19:35:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:26,389 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2021-12-14 19:35:26,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2021-12-14 19:35:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:35:26,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:26,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:26,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 19:35:26,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:26,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1658275025, now seen corresponding path program 1 times [2021-12-14 19:35:26,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:26,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747380928] [2021-12-14 19:35:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:26,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:26,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:26,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747380928] [2021-12-14 19:35:26,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747380928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:26,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:26,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 19:35:26,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158290990] [2021-12-14 19:35:26,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:26,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:35:26,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:35:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 19:35:26,481 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:26,650 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2021-12-14 19:35:26,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 19:35:26,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-12-14 19:35:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:26,651 INFO L225 Difference]: With dead ends: 99 [2021-12-14 19:35:26,652 INFO L226 Difference]: Without dead ends: 99 [2021-12-14 19:35:26,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:35:26,652 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:26,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 192 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-14 19:35:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-12-14 19:35:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 66 states have internal predecessors, (71), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-14 19:35:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-12-14 19:35:26,656 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 31 [2021-12-14 19:35:26,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:26,657 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-12-14 19:35:26,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-12-14 19:35:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-14 19:35:26,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:26,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:26,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 19:35:26,658 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:26,658 INFO L85 PathProgramCache]: Analyzing trace with hash 922787578, now seen corresponding path program 1 times [2021-12-14 19:35:26,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:26,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016227874] [2021-12-14 19:35:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:26,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 19:35:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:35:26,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:26,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016227874] [2021-12-14 19:35:26,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016227874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:26,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:26,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:35:26,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057962859] [2021-12-14 19:35:26,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:35:26,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:35:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:35:26,689 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:26,714 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2021-12-14 19:35:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:35:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-12-14 19:35:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:26,715 INFO L225 Difference]: With dead ends: 85 [2021-12-14 19:35:26,715 INFO L226 Difference]: Without dead ends: 85 [2021-12-14 19:35:26,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:35:26,716 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:26,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-14 19:35:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-14 19:35:26,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.206896551724138) internal successors, (70), 65 states have internal predecessors, (70), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-14 19:35:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2021-12-14 19:35:26,719 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 32 [2021-12-14 19:35:26,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:26,719 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2021-12-14 19:35:26,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2021-12-14 19:35:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 19:35:26,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:26,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:26,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 19:35:26,721 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2035601245, now seen corresponding path program 1 times [2021-12-14 19:35:26,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143053118] [2021-12-14 19:35:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:26,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-14 19:35:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 19:35:26,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:26,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143053118] [2021-12-14 19:35:26,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143053118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:26,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:35:26,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:35:26,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502484569] [2021-12-14 19:35:26,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:26,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:35:26,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:35:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:35:26,779 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:26,826 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-12-14 19:35:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:35:26,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-12-14 19:35:26,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:26,827 INFO L225 Difference]: With dead ends: 84 [2021-12-14 19:35:26,827 INFO L226 Difference]: Without dead ends: 70 [2021-12-14 19:35:26,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:35:26,828 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:26,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 149 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:35:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-14 19:35:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-12-14 19:35:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 53 states have internal predecessors, (57), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-14 19:35:26,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-12-14 19:35:26,831 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2021-12-14 19:35:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:26,831 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-12-14 19:35:26,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-12-14 19:35:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 19:35:26,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:26,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:26,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 19:35:26,832 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:26,833 INFO L85 PathProgramCache]: Analyzing trace with hash 287149833, now seen corresponding path program 1 times [2021-12-14 19:35:26,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:26,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942042505] [2021-12-14 19:35:26,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:26,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:26,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942042505] [2021-12-14 19:35:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942042505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263580130] [2021-12-14 19:35:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:26,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:26,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:26,908 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) [2021-12-14 19:35:26,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:35:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:26,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 19:35:26,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:27,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:35:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263580130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:35:27,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:35:27,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2021-12-14 19:35:27,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569891813] [2021-12-14 19:35:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:35:27,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 19:35:27,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 19:35:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:35:27,111 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:27,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:27,236 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-12-14 19:35:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:35:27,237 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-12-14 19:35:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:27,238 INFO L225 Difference]: With dead ends: 87 [2021-12-14 19:35:27,238 INFO L226 Difference]: Without dead ends: 87 [2021-12-14 19:35:27,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:35:27,238 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 81 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:27,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 240 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:35:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-14 19:35:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-12-14 19:35:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 56 states have internal predecessors, (60), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-14 19:35:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-12-14 19:35:27,241 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 39 [2021-12-14 19:35:27,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:27,242 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-12-14 19:35:27,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-14 19:35:27,242 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-12-14 19:35:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 19:35:27,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:27,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:27,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:27,462 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,SelfDestructingSolverStorable11 [2021-12-14 19:35:27,462 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash 285681908, now seen corresponding path program 1 times [2021-12-14 19:35:27,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:27,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010980165] [2021-12-14 19:35:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:27,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:27,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:27,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:27,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:27,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 19:35:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 19:35:27,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010980165] [2021-12-14 19:35:27,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010980165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973838022] [2021-12-14 19:35:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:27,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:27,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:27,579 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) [2021-12-14 19:35:27,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:35:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:27,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 19:35:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 19:35:27,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:28,033 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 29 treesize of output 25 [2021-12-14 19:35:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 19:35:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973838022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:28,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:28,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2021-12-14 19:35:28,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129508242] [2021-12-14 19:35:28,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:28,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 19:35:28,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:28,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 19:35:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:35:28,276 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-14 19:35:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:28,706 INFO L93 Difference]: Finished difference Result 148 states and 179 transitions. [2021-12-14 19:35:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 19:35:28,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 39 [2021-12-14 19:35:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:28,708 INFO L225 Difference]: With dead ends: 148 [2021-12-14 19:35:28,709 INFO L226 Difference]: Without dead ends: 146 [2021-12-14 19:35:28,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:35:28,710 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 119 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:28,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 523 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 354 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2021-12-14 19:35:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-14 19:35:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 122. [2021-12-14 19:35:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 92 states have internal predecessors, (102), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (27), 19 states have call predecessors, (27), 22 states have call successors, (27) [2021-12-14 19:35:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2021-12-14 19:35:28,721 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 39 [2021-12-14 19:35:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:28,722 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2021-12-14 19:35:28,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-14 19:35:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2021-12-14 19:35:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 19:35:28,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:28,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:28,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:28,940 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,SelfDestructingSolverStorable12 [2021-12-14 19:35:28,941 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:28,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash -337593259, now seen corresponding path program 1 times [2021-12-14 19:35:28,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:28,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529604092] [2021-12-14 19:35:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:28,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:29,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:29,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:29,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:29,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 19:35:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:29,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529604092] [2021-12-14 19:35:29,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529604092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263333120] [2021-12-14 19:35:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:29,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:29,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:29,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:29,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:35:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:29,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-14 19:35:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:29,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:29,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-14 19:35:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:29,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263333120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:29,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:29,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2021-12-14 19:35:29,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117684831] [2021-12-14 19:35:29,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:29,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-14 19:35:29,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:29,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-14 19:35:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 19:35:29,914 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:35:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:31,193 INFO L93 Difference]: Finished difference Result 278 states and 351 transitions. [2021-12-14 19:35:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-14 19:35:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 41 [2021-12-14 19:35:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:31,194 INFO L225 Difference]: With dead ends: 278 [2021-12-14 19:35:31,195 INFO L226 Difference]: Without dead ends: 278 [2021-12-14 19:35:31,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=3555, Unknown=0, NotChecked=0, Total=4032 [2021-12-14 19:35:31,196 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 317 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:31,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 771 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 979 Invalid, 0 Unknown, 254 Unchecked, 0.5s Time] [2021-12-14 19:35:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-14 19:35:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 167. [2021-12-14 19:35:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 127 states have internal predecessors, (144), 29 states have call successors, (29), 11 states have call predecessors, (29), 16 states have return successors, (45), 28 states have call predecessors, (45), 29 states have call successors, (45) [2021-12-14 19:35:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 218 transitions. [2021-12-14 19:35:31,203 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 218 transitions. Word has length 41 [2021-12-14 19:35:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:31,204 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 218 transitions. [2021-12-14 19:35:31,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-12-14 19:35:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 218 transitions. [2021-12-14 19:35:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 19:35:31,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:31,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:31,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-14 19:35:31,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:31,422 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash -525112999, now seen corresponding path program 1 times [2021-12-14 19:35:31,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:31,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903578892] [2021-12-14 19:35:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:31,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:31,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:31,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:31,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:31,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:31,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 19:35:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:31,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:31,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903578892] [2021-12-14 19:35:31,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903578892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:31,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524471062] [2021-12-14 19:35:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:31,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:31,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:31,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:31,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:35:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:31,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-14 19:35:31,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:31,614 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 7 treesize of output 6 [2021-12-14 19:35:33,643 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2021-12-14 19:35:35,663 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_6 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_6))) is different from true [2021-12-14 19:35:37,693 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_7 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_7))) is different from true [2021-12-14 19:35:37,755 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 23 [2021-12-14 19:35:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2021-12-14 19:35:37,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524471062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:40,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:35:40,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-12-14 19:35:40,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042912900] [2021-12-14 19:35:40,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:40,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 19:35:40,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:40,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 19:35:40,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=492, Unknown=3, NotChecked=138, Total=702 [2021-12-14 19:35:40,020 INFO L87 Difference]: Start difference. First operand 167 states and 218 transitions. Second operand has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 19:35:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:40,219 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2021-12-14 19:35:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 19:35:40,220 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2021-12-14 19:35:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:40,221 INFO L225 Difference]: With dead ends: 169 [2021-12-14 19:35:40,221 INFO L226 Difference]: Without dead ends: 169 [2021-12-14 19:35:40,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=125, Invalid=814, Unknown=3, NotChecked=180, Total=1122 [2021-12-14 19:35:40,222 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:40,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 332 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 237 Invalid, 0 Unknown, 274 Unchecked, 0.1s Time] [2021-12-14 19:35:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-14 19:35:40,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-12-14 19:35:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 118 states have (on average 1.228813559322034) internal successors, (145), 128 states have internal predecessors, (145), 29 states have call successors, (29), 12 states have call predecessors, (29), 17 states have return successors, (45), 28 states have call predecessors, (45), 29 states have call successors, (45) [2021-12-14 19:35:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 219 transitions. [2021-12-14 19:35:40,228 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 219 transitions. Word has length 46 [2021-12-14 19:35:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:40,229 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 219 transitions. [2021-12-14 19:35:40,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 19:35:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 219 transitions. [2021-12-14 19:35:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 19:35:40,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:40,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:40,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 19:35:40,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 19:35:40,443 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1395918346, now seen corresponding path program 1 times [2021-12-14 19:35:40,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:40,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947930844] [2021-12-14 19:35:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:40,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 19:35:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 19:35:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 19:35:40,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947930844] [2021-12-14 19:35:40,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947930844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018039737] [2021-12-14 19:35:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:40,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:40,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:40,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:40,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:35:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:40,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-14 19:35:40,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:40,686 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 [2021-12-14 19:35:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:40,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 19:35:41,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018039737] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:41,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:41,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2021-12-14 19:35:41,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517504462] [2021-12-14 19:35:41,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:41,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-14 19:35:41,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-14 19:35:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-12-14 19:35:41,407 INFO L87 Difference]: Start difference. First operand 169 states and 219 transitions. Second operand has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-14 19:35:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:41,839 INFO L93 Difference]: Finished difference Result 244 states and 312 transitions. [2021-12-14 19:35:41,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 19:35:41,840 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 47 [2021-12-14 19:35:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:41,841 INFO L225 Difference]: With dead ends: 244 [2021-12-14 19:35:41,841 INFO L226 Difference]: Without dead ends: 244 [2021-12-14 19:35:41,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-12-14 19:35:41,841 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 218 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:41,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 360 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 468 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2021-12-14 19:35:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-14 19:35:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 172. [2021-12-14 19:35:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 130 states have internal predecessors, (145), 29 states have call successors, (29), 13 states have call predecessors, (29), 18 states have return successors, (45), 28 states have call predecessors, (45), 29 states have call successors, (45) [2021-12-14 19:35:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 219 transitions. [2021-12-14 19:35:41,847 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 219 transitions. Word has length 47 [2021-12-14 19:35:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:41,848 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 219 transitions. [2021-12-14 19:35:41,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-14 19:35:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 219 transitions. [2021-12-14 19:35:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 19:35:41,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:41,849 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:41,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:35:42,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 19:35:42,060 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 323795755, now seen corresponding path program 1 times [2021-12-14 19:35:42,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732885570] [2021-12-14 19:35:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:42,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-14 19:35:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 19:35:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 19:35:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-14 19:35:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 19:35:42,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:42,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732885570] [2021-12-14 19:35:42,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732885570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:42,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852939978] [2021-12-14 19:35:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:42,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:42,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:42,212 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:42,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:35:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-14 19:35:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:42,295 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 [2021-12-14 19:35:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 19:35:42,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 19:35:43,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852939978] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:35:43,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:35:43,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-14 19:35:43,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238656759] [2021-12-14 19:35:43,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:43,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 19:35:43,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 19:35:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-12-14 19:35:43,087 INFO L87 Difference]: Start difference. First operand 172 states and 219 transitions. Second operand has 23 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-14 19:35:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:43,699 INFO L93 Difference]: Finished difference Result 273 states and 335 transitions. [2021-12-14 19:35:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:35:43,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2021-12-14 19:35:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:43,703 INFO L225 Difference]: With dead ends: 273 [2021-12-14 19:35:43,703 INFO L226 Difference]: Without dead ends: 273 [2021-12-14 19:35:43,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-12-14 19:35:43,704 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 294 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:43,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 506 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 619 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2021-12-14 19:35:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-14 19:35:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 178. [2021-12-14 19:35:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 128 states have (on average 1.171875) internal successors, (150), 134 states have internal predecessors, (150), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2021-12-14 19:35:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 216 transitions. [2021-12-14 19:35:43,714 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 216 transitions. Word has length 48 [2021-12-14 19:35:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:43,714 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 216 transitions. [2021-12-14 19:35:43,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-12-14 19:35:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 216 transitions. [2021-12-14 19:35:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 19:35:43,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:43,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:43,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 19:35:43,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-14 19:35:43,937 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2076994669, now seen corresponding path program 1 times [2021-12-14 19:35:43,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:43,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288454090] [2021-12-14 19:35:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:43,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:43,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 19:35:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:44,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 19:35:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:44,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 19:35:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 19:35:44,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:44,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288454090] [2021-12-14 19:35:44,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288454090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:44,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792152049] [2021-12-14 19:35:44,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:44,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:44,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:44,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:44,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:35:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:44,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 19:35:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:44,210 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 [2021-12-14 19:35:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 19:35:44,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:35:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792152049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:45,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 19:35:45,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-12-14 19:35:45,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514412601] [2021-12-14 19:35:45,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 19:35:45,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 19:35:45,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:35:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 19:35:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:35:45,644 INFO L87 Difference]: Start difference. First operand 178 states and 216 transitions. Second operand has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-14 19:35:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:35:46,347 INFO L93 Difference]: Finished difference Result 369 states and 470 transitions. [2021-12-14 19:35:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-14 19:35:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 54 [2021-12-14 19:35:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:35:46,349 INFO L225 Difference]: With dead ends: 369 [2021-12-14 19:35:46,349 INFO L226 Difference]: Without dead ends: 346 [2021-12-14 19:35:46,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 19:35:46,350 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 127 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:35:46,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 790 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:35:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-14 19:35:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2021-12-14 19:35:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 176 states have (on average 1.1818181818181819) internal successors, (208), 177 states have internal predecessors, (208), 32 states have call successors, (32), 15 states have call predecessors, (32), 23 states have return successors, (51), 41 states have call predecessors, (51), 32 states have call successors, (51) [2021-12-14 19:35:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 291 transitions. [2021-12-14 19:35:46,379 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 291 transitions. Word has length 54 [2021-12-14 19:35:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:35:46,379 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 291 transitions. [2021-12-14 19:35:46,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-14 19:35:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 291 transitions. [2021-12-14 19:35:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-14 19:35:46,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:35:46,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:35:46,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 19:35:46,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:46,598 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-12-14 19:35:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:35:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 412534293, now seen corresponding path program 1 times [2021-12-14 19:35:46,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:35:46,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749978489] [2021-12-14 19:35:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:46,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:35:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 19:35:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 19:35:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 19:35:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 19:35:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 19:35:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 19:35:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 19:35:46,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:35:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749978489] [2021-12-14 19:35:46,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749978489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:35:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571751969] [2021-12-14 19:35:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:35:46,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:35:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:35:46,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:35:46,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:35:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:35:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-14 19:35:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:35:46,869 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 7 treesize of output 6 [2021-12-14 19:35:48,877 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_6| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_6|))) is different from true