./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/lcp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/lcp.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 99469a4d9e5d9407366653a2d47248a07b3d0735 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:12:49,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:12:49,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:12:49,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:12:49,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:12:49,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:12:49,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:12:49,120 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:12:49,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:12:49,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:12:49,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:12:49,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:12:49,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:12:49,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:12:49,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:12:49,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:12:49,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:12:49,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:12:49,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:12:49,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:12:49,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:12:49,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:12:49,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:12:49,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:12:49,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:12:49,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:12:49,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:12:49,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:12:49,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:12:49,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:12:49,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:12:49,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:12:49,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:12:49,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:12:49,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:12:49,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:12:49,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:12:49,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:12:49,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:12:49,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:12:49,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:12:49,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:12:49,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:12:49,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:12:49,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:12:49,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:12:49,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:12:49,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:12:49,229 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:12:49,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:12:49,229 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:12:49,229 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:12:49,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:12:49,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:12:49,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:12:49,231 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:12:49,231 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:12:49,231 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:12:49,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:12:49,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:12:49,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:12:49,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:12:49,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:12:49,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:12:49,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:12:49,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:12:49,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:12:49,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:12:49,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:12:49,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:12:49,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:12:49,235 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99469a4d9e5d9407366653a2d47248a07b3d0735 [2021-08-27 05:12:49,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:12:49,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:12:49,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:12:49,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:12:49,623 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:12:49,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/lcp.c [2021-08-27 05:12:49,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ba41041/c881638bbe3c4ea29d9c7e7d67cdc740/FLAG8e1ef27c9 [2021-08-27 05:12:50,154 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:12:50,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/lcp.c [2021-08-27 05:12:50,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ba41041/c881638bbe3c4ea29d9c7e7d67cdc740/FLAG8e1ef27c9 [2021-08-27 05:12:50,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ba41041/c881638bbe3c4ea29d9c7e7d67cdc740 [2021-08-27 05:12:50,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:12:50,545 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:12:50,546 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:12:50,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:12:50,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:12:50,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@693c392d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50, skipping insertion in model container [2021-08-27 05:12:50,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:12:50,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:12:50,710 WARN L228 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/lcp.c[515,528] [2021-08-27 05:12:50,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:12:50,737 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:12:50,749 WARN L228 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/lcp.c[515,528] [2021-08-27 05:12:50,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:12:50,769 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:12:50,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50 WrapperNode [2021-08-27 05:12:50,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:12:50,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:12:50,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:12:50,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:12:50,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:12:50,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:12:50,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:12:50,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:12:50,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (1/1) ... [2021-08-27 05:12:50,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:12:50,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:50,830 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) [2021-08-27 05:12:50,843 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 [2021-08-27 05:12:50,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:12:50,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:12:50,875 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-08-27 05:12:50,875 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:12:50,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-08-27 05:12:50,875 INFO L138 BoogieDeclarations]: Found implementation of procedure lcp [2021-08-27 05:12:50,875 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-08-27 05:12:50,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:12:50,876 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-08-27 05:12:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:12:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:12:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:12:50,876 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:12:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-08-27 05:12:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:12:50,877 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:12:50,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:12:50,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-08-27 05:12:50,881 INFO L130 BoogieDeclarations]: Found specification of procedure lcp [2021-08-27 05:12:50,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:12:50,881 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-08-27 05:12:50,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:12:50,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:12:50,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-08-27 05:12:50,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:12:50,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:12:50,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:12:50,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:12:50,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:12:51,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:12:51,310 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-27 05:12:51,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:12:51 BoogieIcfgContainer [2021-08-27 05:12:51,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:12:51,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:12:51,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:12:51,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:12:51,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:12:50" (1/3) ... [2021-08-27 05:12:51,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b32415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:12:51, skipping insertion in model container [2021-08-27 05:12:51,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:12:50" (2/3) ... [2021-08-27 05:12:51,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b32415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:12:51, skipping insertion in model container [2021-08-27 05:12:51,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:12:51" (3/3) ... [2021-08-27 05:12:51,324 INFO L111 eAbstractionObserver]: Analyzing ICFG lcp.c [2021-08-27 05:12:51,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:12:51,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-08-27 05:12:51,380 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:12:51,391 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, mConcurrency=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 [2021-08-27 05:12:51,393 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-08-27 05:12:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-08-27 05:12:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:12:51,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:51,422 INFO L512 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] [2021-08-27 05:12:51,423 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting lcpErr0REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:12:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:51,433 INFO L82 PathProgramCache]: Analyzing trace with hash 239182866, now seen corresponding path program 1 times [2021-08-27 05:12:51,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:51,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617634873] [2021-08-27 05:12:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:51,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:51,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:51,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:51,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:51,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:12:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:51,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:51,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617634873] [2021-08-27 05:12:51,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617634873] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:51,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:51,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:12:51,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769708311] [2021-08-27 05:12:51,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:12:51,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:12:51,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:12:51,790 INFO L87 Difference]: Start difference. First operand has 73 states, 38 states have (on average 1.605263157894737) internal successors, (61), 55 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:12:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:52,016 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-08-27 05:12:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:12:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-08-27 05:12:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:52,026 INFO L225 Difference]: With dead ends: 73 [2021-08-27 05:12:52,027 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 05:12:52,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:12:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 05:12:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-27 05:12:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 53 states have internal predecessors, (56), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-08-27 05:12:52,078 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 27 [2021-08-27 05:12:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:52,078 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-08-27 05:12:52,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:12:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-08-27 05:12:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:12:52,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:52,082 INFO L512 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] [2021-08-27 05:12:52,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:12:52,082 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting lcpErr0REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:12:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2035859794, now seen corresponding path program 1 times [2021-08-27 05:12:52,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:52,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145899673] [2021-08-27 05:12:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:52,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:52,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:52,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:52,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:52,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:12:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:52,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:52,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145899673] [2021-08-27 05:12:52,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145899673] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:52,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:52,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:12:52,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030590648] [2021-08-27 05:12:52,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:12:52,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:12:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:12:52,334 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:52,710 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2021-08-27 05:12:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:12:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-08-27 05:12:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:52,712 INFO L225 Difference]: With dead ends: 67 [2021-08-27 05:12:52,712 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 05:12:52,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:12:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 05:12:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-08-27 05:12:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 50 states have internal predecessors, (53), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-08-27 05:12:52,720 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 27 [2021-08-27 05:12:52,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:52,721 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-08-27 05:12:52,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-08-27 05:12:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:12:52,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:52,723 INFO L512 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] [2021-08-27 05:12:52,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:12:52,723 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting lcpErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:12:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:52,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2035859795, now seen corresponding path program 1 times [2021-08-27 05:12:52,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:52,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814188179] [2021-08-27 05:12:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:52,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:53,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:53,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:53,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:53,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:12:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:12:53,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:53,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814188179] [2021-08-27 05:12:53,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814188179] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:53,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:53,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 05:12:53,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834278693] [2021-08-27 05:12:53,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:12:53,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:53,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:12:53,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:12:53,101 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:54,017 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-08-27 05:12:54,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 05:12:54,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-08-27 05:12:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:54,020 INFO L225 Difference]: With dead ends: 80 [2021-08-27 05:12:54,021 INFO L226 Difference]: Without dead ends: 80 [2021-08-27 05:12:54,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 498.2ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-27 05:12:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-27 05:12:54,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2021-08-27 05:12:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.4) internal successors, (56), 52 states have internal predecessors, (56), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-08-27 05:12:54,028 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 27 [2021-08-27 05:12:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:54,029 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-08-27 05:12:54,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-08-27 05:12:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 05:12:54,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:54,030 INFO L512 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] [2021-08-27 05:12:54,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:12:54,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting lcpErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:12:54,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1312855789, now seen corresponding path program 1 times [2021-08-27 05:12:54,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:54,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032630644] [2021-08-27 05:12:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:54,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:54,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:54,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:12:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:12:54,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:54,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032630644] [2021-08-27 05:12:54,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032630644] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:54,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:54,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 05:12:54,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436222804] [2021-08-27 05:12:54,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:12:54,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:12:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:12:54,339 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 13 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:55,134 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-08-27 05:12:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 05:12:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-08-27 05:12:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:55,136 INFO L225 Difference]: With dead ends: 79 [2021-08-27 05:12:55,136 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 05:12:55,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-27 05:12:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 05:12:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-08-27 05:12:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 53 states have internal predecessors, (57), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-08-27 05:12:55,142 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 28 [2021-08-27 05:12:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:55,142 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-08-27 05:12:55,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 05:12:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-08-27 05:12:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:12:55,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:55,144 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 05:12:55,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:12:55,144 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting lcpErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:12:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1074693896, now seen corresponding path program 1 times [2021-08-27 05:12:55,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:55,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838263098] [2021-08-27 05:12:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:55,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:12:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:55,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:55,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838263098] [2021-08-27 05:12:55,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838263098] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:12:55,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:12:55,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:12:55,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2522145] [2021-08-27 05:12:55,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:12:55,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:12:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:12:55,219 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 05:12:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:12:55,403 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-08-27 05:12:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:12:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-08-27 05:12:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:12:55,405 INFO L225 Difference]: With dead ends: 71 [2021-08-27 05:12:55,405 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 05:12:55,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:12:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 05:12:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 05:12:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 42 states have (on average 1.380952380952381) internal successors, (58), 54 states have internal predecessors, (58), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:12:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-08-27 05:12:55,410 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 30 [2021-08-27 05:12:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:12:55,411 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-08-27 05:12:55,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 05:12:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-08-27 05:12:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 05:12:55,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:12:55,412 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:12:55,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:12:55,413 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting lcpErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:12:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:12:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash -613624539, now seen corresponding path program 1 times [2021-08-27 05:12:55,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:12:55,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604760744] [2021-08-27 05:12:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:55,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:12:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:12:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:12:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:12:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:12:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:12:55,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:12:55,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604760744] [2021-08-27 05:12:55,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604760744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:55,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976816952] [2021-08-27 05:12:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:12:55,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:12:55,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:12:55,663 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) [2021-08-27 05:12:55,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 05:12:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:12:55,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 05:12:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:12:55,890 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 8 treesize of output 7 [2021-08-27 05:12:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:12:57,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976816952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:12:57,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:12:57,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-27 05:12:57,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740246472] [2021-08-27 05:12:57,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 05:12:57,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:12:57,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 05:12:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2021-08-27 05:12:57,880 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 05:13:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:00,352 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-08-27 05:13:00,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 05:13:00,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2021-08-27 05:13:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:00,354 INFO L225 Difference]: With dead ends: 92 [2021-08-27 05:13:00,354 INFO L226 Difference]: Without dead ends: 92 [2021-08-27 05:13:00,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2536.9ms TimeCoverageRelationStatistics Valid=204, Invalid=851, Unknown=1, NotChecked=0, Total=1056 [2021-08-27 05:13:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-27 05:13:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-08-27 05:13:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 59 states have internal predecessors, (64), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:13:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-08-27 05:13:00,360 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 33 [2021-08-27 05:13:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:00,361 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-08-27 05:13:00,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 05:13:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-08-27 05:13:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 05:13:00,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:00,362 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:13:00,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-27 05:13:00,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-27 05:13:00,569 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting lcpErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:00,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1842491519, now seen corresponding path program 1 times [2021-08-27 05:13:00,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:00,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132180352] [2021-08-27 05:13:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:00,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:00,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:00,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:00,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:13:00,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:00,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132180352] [2021-08-27 05:13:00,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132180352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:00,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25308178] [2021-08-27 05:13:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:00,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:00,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:13:00,843 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) [2021-08-27 05:13:00,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 05:13:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:00,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 05:13:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:13:01,013 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 8 treesize of output 7 [2021-08-27 05:13:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:13:02,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25308178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:02,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:13:02,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-08-27 05:13:02,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059605201] [2021-08-27 05:13:02,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 05:13:02,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 05:13:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-08-27 05:13:02,186 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 05:13:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:04,259 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-08-27 05:13:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 05:13:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2021-08-27 05:13:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:04,262 INFO L225 Difference]: With dead ends: 93 [2021-08-27 05:13:04,262 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 05:13:04,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1592.9ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 05:13:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 05:13:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2021-08-27 05:13:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.297872340425532) internal successors, (61), 57 states have internal predecessors, (61), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:13:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-08-27 05:13:04,268 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 34 [2021-08-27 05:13:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:04,268 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-08-27 05:13:04,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 05:13:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-08-27 05:13:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:13:04,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:04,269 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:13:04,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-27 05:13:04,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-27 05:13:04,493 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash 246796823, now seen corresponding path program 1 times [2021-08-27 05:13:04,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:04,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784189294] [2021-08-27 05:13:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:04,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-08-27 05:13:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:13:04,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:04,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784189294] [2021-08-27 05:13:04,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784189294] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:13:04,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:13:04,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:13:04,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110216145] [2021-08-27 05:13:04,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:13:04,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:04,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:13:04,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:13:04,638 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 05:13:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:04,915 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-08-27 05:13:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:13:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-08-27 05:13:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:04,916 INFO L225 Difference]: With dead ends: 73 [2021-08-27 05:13:04,916 INFO L226 Difference]: Without dead ends: 73 [2021-08-27 05:13:04,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:13:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-27 05:13:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-08-27 05:13:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 53 states have internal predecessors, (57), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:13:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-08-27 05:13:04,921 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 39 [2021-08-27 05:13:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:04,922 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-08-27 05:13:04,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 05:13:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-08-27 05:13:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:13:04,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:04,923 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:13:04,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:13:04,924 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:04,924 INFO L82 PathProgramCache]: Analyzing trace with hash 246796824, now seen corresponding path program 1 times [2021-08-27 05:13:04,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:04,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589360606] [2021-08-27 05:13:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:04,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:04,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-08-27 05:13:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:13:05,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:05,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589360606] [2021-08-27 05:13:05,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589360606] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:13:05,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:13:05,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 05:13:05,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544921268] [2021-08-27 05:13:05,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 05:13:05,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 05:13:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 05:13:05,076 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-27 05:13:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:05,536 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-08-27 05:13:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 05:13:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-08-27 05:13:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:05,537 INFO L225 Difference]: With dead ends: 87 [2021-08-27 05:13:05,537 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 05:13:05,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-27 05:13:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 05:13:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-27 05:13:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 59 states have internal predecessors, (63), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:13:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-08-27 05:13:05,543 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 39 [2021-08-27 05:13:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:05,543 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-08-27 05:13:05,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-27 05:13:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-08-27 05:13:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 05:13:05,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:05,545 INFO L512 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, 1, 1, 1, 1] [2021-08-27 05:13:05,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 05:13:05,545 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1405139690, now seen corresponding path program 1 times [2021-08-27 05:13:05,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:05,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014396879] [2021-08-27 05:13:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:05,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:05,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:06,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-08-27 05:13:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:13:06,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:06,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014396879] [2021-08-27 05:13:06,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014396879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:06,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913005757] [2021-08-27 05:13:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:06,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:06,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:13:06,079 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) [2021-08-27 05:13:06,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 05:13:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:06,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 05:13:06,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:13:06,273 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 8 treesize of output 7 [2021-08-27 05:13:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:13:07,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913005757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:07,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:13:07,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 35 [2021-08-27 05:13:07,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600577740] [2021-08-27 05:13:07,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 05:13:07,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:07,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 05:13:07,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 05:13:07,770 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 36 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 27 states have internal predecessors, (52), 7 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-08-27 05:13:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:11,158 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2021-08-27 05:13:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 05:13:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 27 states have internal predecessors, (52), 7 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2021-08-27 05:13:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:11,159 INFO L225 Difference]: With dead ends: 127 [2021-08-27 05:13:11,159 INFO L226 Difference]: Without dead ends: 127 [2021-08-27 05:13:11,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2615.3ms TimeCoverageRelationStatistics Valid=380, Invalid=3158, Unknown=2, NotChecked=0, Total=3540 [2021-08-27 05:13:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-27 05:13:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2021-08-27 05:13:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 88 states have internal predecessors, (99), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-08-27 05:13:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2021-08-27 05:13:11,178 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 45 [2021-08-27 05:13:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:11,178 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2021-08-27 05:13:11,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 27 states have internal predecessors, (52), 7 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-08-27 05:13:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2021-08-27 05:13:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 05:13:11,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:11,183 INFO L512 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, 1, 1, 1, 1, 1] [2021-08-27 05:13:11,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:13:11,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:11,397 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:11,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:11,397 INFO L82 PathProgramCache]: Analyzing trace with hash 609657402, now seen corresponding path program 1 times [2021-08-27 05:13:11,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:11,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231966898] [2021-08-27 05:13:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:11,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:11,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:11,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:11,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:11,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:11,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:11,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-08-27 05:13:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:13:11,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:11,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231966898] [2021-08-27 05:13:11,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231966898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:11,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337863386] [2021-08-27 05:13:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:11,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:13:11,906 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) [2021-08-27 05:13:11,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 05:13:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 05:13:12,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:13:12,131 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 8 treesize of output 7 [2021-08-27 05:13:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:13:14,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337863386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:14,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:13:14,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-08-27 05:13:14,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835253143] [2021-08-27 05:13:14,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 05:13:14,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 05:13:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 05:13:14,053 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 37 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 9 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:13:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:17,402 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-08-27 05:13:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-27 05:13:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 9 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 46 [2021-08-27 05:13:17,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:17,404 INFO L225 Difference]: With dead ends: 126 [2021-08-27 05:13:17,404 INFO L226 Difference]: Without dead ends: 126 [2021-08-27 05:13:17,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 3010.8ms TimeCoverageRelationStatistics Valid=402, Invalid=3379, Unknown=1, NotChecked=0, Total=3782 [2021-08-27 05:13:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-27 05:13:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-08-27 05:13:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 81 states have (on average 1.2098765432098766) internal successors, (98), 88 states have internal predecessors, (98), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-08-27 05:13:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-08-27 05:13:17,409 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 46 [2021-08-27 05:13:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:17,410 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-08-27 05:13:17,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 9 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:13:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-08-27 05:13:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 05:13:17,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:17,411 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:13:17,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-27 05:13:17,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:17,621 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash -142732031, now seen corresponding path program 1 times [2021-08-27 05:13:17,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:17,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500729288] [2021-08-27 05:13:17,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:17,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:17,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:17,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:17,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:17,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-08-27 05:13:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 05:13:17,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:17,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500729288] [2021-08-27 05:13:17,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500729288] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:13:17,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:13:17,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 05:13:17,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187520989] [2021-08-27 05:13:17,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:13:17,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:13:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:13:17,837 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:13:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:18,476 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-08-27 05:13:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 05:13:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-08-27 05:13:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:18,477 INFO L225 Difference]: With dead ends: 116 [2021-08-27 05:13:18,477 INFO L226 Difference]: Without dead ends: 116 [2021-08-27 05:13:18,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 375.7ms TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-27 05:13:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-27 05:13:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-08-27 05:13:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 88 states have internal predecessors, (96), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-08-27 05:13:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2021-08-27 05:13:18,483 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 50 [2021-08-27 05:13:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:18,483 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2021-08-27 05:13:18,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:13:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2021-08-27 05:13:18,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 05:13:18,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:18,484 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-27 05:13:18,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 05:13:18,485 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash 869940796, now seen corresponding path program 2 times [2021-08-27 05:13:18,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:18,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951980738] [2021-08-27 05:13:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:18,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:18,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:18,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 05:13:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:13:19,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:19,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951980738] [2021-08-27 05:13:19,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951980738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:19,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568239523] [2021-08-27 05:13:19,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:13:19,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:19,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:13:19,017 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) [2021-08-27 05:13:19,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 05:13:19,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:13:19,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:13:19,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 05:13:19,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:13:19,324 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 8 treesize of output 7 [2021-08-27 05:13:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:13:20,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568239523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:20,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:13:20,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 36 [2021-08-27 05:13:20,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895142084] [2021-08-27 05:13:20,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 05:13:20,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 05:13:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 05:13:20,843 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 37 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:13:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:24,824 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2021-08-27 05:13:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 05:13:24,825 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 51 [2021-08-27 05:13:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:24,826 INFO L225 Difference]: With dead ends: 152 [2021-08-27 05:13:24,826 INFO L226 Difference]: Without dead ends: 152 [2021-08-27 05:13:24,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2519.9ms TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 05:13:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-27 05:13:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-08-27 05:13:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 87 states have internal predecessors, (95), 14 states have call successors, (14), 14 states have call predecessors, (14), 14 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-08-27 05:13:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 123 transitions. [2021-08-27 05:13:24,831 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 123 transitions. Word has length 51 [2021-08-27 05:13:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:24,832 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 123 transitions. [2021-08-27 05:13:24,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:13:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 123 transitions. [2021-08-27 05:13:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 05:13:24,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:24,833 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-27 05:13:24,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 05:13:25,040 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,SelfDestructingSolverStorable12 [2021-08-27 05:13:25,041 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:25,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1198360872, now seen corresponding path program 2 times [2021-08-27 05:13:25,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:25,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800762940] [2021-08-27 05:13:25,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:25,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:25,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:25,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:25,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:25,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 05:13:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:13:25,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:25,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800762940] [2021-08-27 05:13:25,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800762940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:25,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166343909] [2021-08-27 05:13:25,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:13:25,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:13:25,600 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) [2021-08-27 05:13:25,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 05:13:25,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:13:25,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:13:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 05:13:25,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:13:25,942 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 8 treesize of output 7 [2021-08-27 05:13:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:13:27,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166343909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:27,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:13:27,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 36 [2021-08-27 05:13:27,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219328888] [2021-08-27 05:13:27,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 05:13:27,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 05:13:27,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 05:13:27,409 INFO L87 Difference]: Start difference. First operand 115 states and 123 transitions. Second operand has 37 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:13:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:31,598 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2021-08-27 05:13:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 05:13:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 52 [2021-08-27 05:13:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:31,600 INFO L225 Difference]: With dead ends: 149 [2021-08-27 05:13:31,600 INFO L226 Difference]: Without dead ends: 149 [2021-08-27 05:13:31,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2896.9ms TimeCoverageRelationStatistics Valid=404, Invalid=3252, Unknown=4, NotChecked=0, Total=3660 [2021-08-27 05:13:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-08-27 05:13:31,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 77. [2021-08-27 05:13:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 57 states have internal predecessors, (60), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-08-27 05:13:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-08-27 05:13:31,604 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 52 [2021-08-27 05:13:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:31,604 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-08-27 05:13:31,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 31 states have internal predecessors, (68), 9 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-08-27 05:13:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-08-27 05:13:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-27 05:13:31,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:31,606 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:13:31,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 05:13:31,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:31,813 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash 935757242, now seen corresponding path program 1 times [2021-08-27 05:13:31,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:31,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337433339] [2021-08-27 05:13:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:31,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:31,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:31,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:31,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:31,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:31,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-08-27 05:13:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:32,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-08-27 05:13:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 05:13:32,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:32,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337433339] [2021-08-27 05:13:32,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337433339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:32,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143616456] [2021-08-27 05:13:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:32,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:32,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:13:32,061 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) [2021-08-27 05:13:32,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 05:13:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-27 05:13:32,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:13:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 05:13:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143616456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:32,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:13:32,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-08-27 05:13:32,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067286929] [2021-08-27 05:13:32,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:13:32,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:13:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:13:32,933 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-27 05:13:33,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:33,468 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2021-08-27 05:13:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 05:13:33,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2021-08-27 05:13:33,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:33,469 INFO L225 Difference]: With dead ends: 99 [2021-08-27 05:13:33,469 INFO L226 Difference]: Without dead ends: 99 [2021-08-27 05:13:33,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-27 05:13:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-27 05:13:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2021-08-27 05:13:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 67 states have internal predecessors, (69), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-08-27 05:13:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-08-27 05:13:33,473 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 54 [2021-08-27 05:13:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:33,474 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-08-27 05:13:33,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-27 05:13:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-08-27 05:13:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-27 05:13:33,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:33,475 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:13:33,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 05:13:33,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:33,689 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1479115117, now seen corresponding path program 1 times [2021-08-27 05:13:33,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:33,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617302402] [2021-08-27 05:13:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:33,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-27 05:13:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 05:13:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 05:13:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 05:13:33,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:33,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617302402] [2021-08-27 05:13:33,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617302402] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:13:33,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:13:33,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:13:33,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062003646] [2021-08-27 05:13:33,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:13:33,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:13:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:13:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:13:33,779 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-27 05:13:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:13:33,952 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2021-08-27 05:13:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:13:33,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 57 [2021-08-27 05:13:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:13:33,954 INFO L225 Difference]: With dead ends: 90 [2021-08-27 05:13:33,954 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 05:13:33,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:13:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 05:13:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-27 05:13:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 62 states have (on average 1.096774193548387) internal successors, (68), 66 states have internal predecessors, (68), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-08-27 05:13:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-08-27 05:13:33,960 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 57 [2021-08-27 05:13:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:13:33,961 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-08-27 05:13:33,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-27 05:13:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-08-27 05:13:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-27 05:13:33,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:13:33,963 INFO L512 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, 1, 1, 1] [2021-08-27 05:13:33,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 05:13:33,963 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:13:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:13:33,964 INFO L82 PathProgramCache]: Analyzing trace with hash -534003461, now seen corresponding path program 1 times [2021-08-27 05:13:33,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:13:33,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846600352] [2021-08-27 05:13:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:33,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:13:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:13:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:13:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:13:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:13:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:13:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-08-27 05:13:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-08-27 05:13:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:13:34,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:13:34,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846600352] [2021-08-27 05:13:34,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846600352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:13:34,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811122964] [2021-08-27 05:13:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:13:34,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:13:34,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:13:34,201 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) [2021-08-27 05:13:34,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 05:13:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:13:34,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-27 05:13:34,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:13:34,636 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 [2021-08-27 05:13:36,662 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_17 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_17))) is different from true [2021-08-27 05:13:38,693 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_18 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_18))) is different from true [2021-08-27 05:14:06,972 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-08-27 05:14:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 05:14:21,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811122964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:14:21,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:14:21,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-08-27 05:14:21,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445472122] [2021-08-27 05:14:21,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 05:14:21,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:14:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 05:14:21,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=247, Unknown=15, NotChecked=66, Total=380 [2021-08-27 05:14:21,123 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-08-27 05:14:41,525 WARN L207 SmtUtils]: Spent 10.05 s on a formula simplification that was a NOOP. DAG size: 66 [2021-08-27 05:14:51,587 WARN L207 SmtUtils]: Spent 10.05 s on a formula simplification that was a NOOP. DAG size: 71 [2021-08-27 05:15:03,664 WARN L207 SmtUtils]: Spent 10.05 s on a formula simplification that was a NOOP. DAG size: 71 [2021-08-27 05:15:11,855 WARN L207 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-08-27 05:15:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:11,991 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-08-27 05:15:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 05:15:11,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 57 [2021-08-27 05:15:11,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:11,992 INFO L225 Difference]: With dead ends: 67 [2021-08-27 05:15:11,992 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 05:15:11,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 92754.0ms TimeCoverageRelationStatistics Valid=158, Invalid=590, Unknown=16, NotChecked=106, Total=870 [2021-08-27 05:15:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 05:15:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2021-08-27 05:15:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-08-27 05:15:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-08-27 05:15:11,994 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2021-08-27 05:15:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:11,995 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-08-27 05:15:11,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-08-27 05:15:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-08-27 05:15:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-27 05:15:11,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:11,996 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:12,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:12,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 05:15:12,201 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK (and 13 more)] === [2021-08-27 05:15:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:12,201 INFO L82 PathProgramCache]: Analyzing trace with hash 204549270, now seen corresponding path program 1 times [2021-08-27 05:15:12,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:12,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120501700] [2021-08-27 05:15:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:12,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-08-27 05:15:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 05:15:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-08-27 05:15:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-08-27 05:15:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 05:15:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 05:15:12,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:12,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120501700] [2021-08-27 05:15:12,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120501700] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:12,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:12,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:15:12,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215624507] [2021-08-27 05:15:12,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:15:12,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:15:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:15:12,340 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-08-27 05:15:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:12,501 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-08-27 05:15:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:15:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 59 [2021-08-27 05:15:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:12,502 INFO L225 Difference]: With dead ends: 59 [2021-08-27 05:15:12,502 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 05:15:12,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:15:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 05:15:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 05:15:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 05:15:12,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 05:15:12,503 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2021-08-27 05:15:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:12,504 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 05:15:12,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-08-27 05:15:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 05:15:12,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 05:15:12,506 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:15:12,507 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:15:12,507 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:15:12,507 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:15:12,507 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION [2021-08-27 05:15:12,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION [2021-08-27 05:15:12,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION [2021-08-27 05:15:12,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION [2021-08-27 05:15:12,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION [2021-08-27 05:15:12,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION [2021-08-27 05:15:12,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION [2021-08-27 05:15:12,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION [2021-08-27 05:15:12,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location lcpErr0REQUIRES_VIOLATION [2021-08-27 05:15:12,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location lcpErr1REQUIRES_VIOLATION [2021-08-27 05:15:12,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location lcpErr2REQUIRES_VIOLATION [2021-08-27 05:15:12,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location lcpErr3REQUIRES_VIOLATION [2021-08-27 05:15:12,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 05:15:12,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 05:15:12,514 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:15:12,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:15:12 BoogieIcfgContainer [2021-08-27 05:15:12,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:15:12,516 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:15:12,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:15:12,517 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:15:12,517 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:12:51" (3/4) ... [2021-08-27 05:15:12,520 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 05:15:12,526 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 05:15:12,526 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 05:15:12,526 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure lcp [2021-08-27 05:15:12,527 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-08-27 05:15:12,527 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 05:15:12,527 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-08-27 05:15:12,527 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-08-27 05:15:12,527 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-08-27 05:15:12,531 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 26 nodes and edges [2021-08-27 05:15:12,532 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-08-27 05:15:12,532 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-27 05:15:12,532 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:15:12,532 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:15:12,564 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:15:12,564 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:15:12,565 INFO L168 Benchmark]: Toolchain (without parser) took 142020.43 ms. Allocated memory was 56.6 MB in the beginning and 211.8 MB in the end (delta: 155.2 MB). Free memory was 41.9 MB in the beginning and 109.6 MB in the end (delta: -67.7 MB). Peak memory consumption was 86.8 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:12,565 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 46.1 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:15:12,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.50 ms. Allocated memory is still 56.6 MB. Free memory was 41.8 MB in the beginning and 31.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:12,566 INFO L168 Benchmark]: Boogie Preprocessor took 31.85 ms. Allocated memory is still 56.6 MB. Free memory was 31.4 MB in the beginning and 29.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:15:12,566 INFO L168 Benchmark]: RCFGBuilder took 507.92 ms. Allocated memory is still 56.6 MB. Free memory was 29.7 MB in the beginning and 36.2 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:12,567 INFO L168 Benchmark]: TraceAbstraction took 141202.98 ms. Allocated memory was 56.6 MB in the beginning and 211.8 MB in the end (delta: 155.2 MB). Free memory was 35.7 MB in the beginning and 112.8 MB in the end (delta: -77.1 MB). Peak memory consumption was 80.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:12,567 INFO L168 Benchmark]: Witness Printer took 48.01 ms. Allocated memory is still 211.8 MB. Free memory was 112.8 MB in the beginning and 109.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:15:12,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 46.1 MB. Free memory was 28.7 MB in the beginning and 28.6 MB in the end (delta: 32.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 224.50 ms. Allocated memory is still 56.6 MB. Free memory was 41.8 MB in the beginning and 31.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.85 ms. Allocated memory is still 56.6 MB. Free memory was 31.4 MB in the beginning and 29.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 507.92 ms. Allocated memory is still 56.6 MB. Free memory was 29.7 MB in the beginning and 36.2 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 141202.98 ms. Allocated memory was 56.6 MB in the beginning and 211.8 MB in the end (delta: 155.2 MB). Free memory was 35.7 MB in the beginning and 112.8 MB in the end (delta: -77.1 MB). Peak memory consumption was 80.2 MB. Max. memory is 16.1 GB. * Witness Printer took 48.01 ms. Allocated memory is still 211.8 MB. Free memory was 112.8 MB in the beginning and 109.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 35]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 76 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 141136.6ms, OverallIterations: 18, TraceHistogramMax: 3, EmptinessCheckTime: 30.9ms, AutomataDifference: 75143.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 724 SDtfs, 2874 SDslu, 1281 SDs, 0 SdLazy, 13167 SolverSat, 987 SolverUnsat, 81 SolverUnknown, 0 SolverNotchecked, 16749.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 949 GetRequests, 454 SyntacticMatches, 26 SemanticMatches, 469 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3434 ImplicationChecksByTransitivity, 110364.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=10, InterpolantAutomatonStates: 276, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 119.6ms AutomataMinimizationTime, 18 MinimizatonAttempts, 192 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 160.7ms SsaConstructionTime, 579.4ms SatisfiabilityAnalysisTime, 61494.5ms InterpolantComputationTime, 1127 NumberOfCodeBlocks, 1127 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1101 ConstructedInterpolants, 142 QuantifiedInterpolants, 8582 SizeOfPredicates, 97 NumberOfNonLiveVariables, 1937 ConjunctsInSsa, 238 ConjunctsInUnsatCore, 26 InterpolantComputations, 10 PerfectInterpolantSequences, 262/343 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 05:15:12,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...