./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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/elimination_max_rec_onepoint.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4099afe4d4ae3c88800047494721799286636d7a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 05:15:15,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:15:15,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:15:15,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:15:15,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:15:15,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:15:15,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:15:15,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:15:15,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:15:15,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:15:15,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:15:15,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:15:15,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:15:15,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:15:15,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:15:15,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:15:15,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:15:15,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:15:15,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:15:15,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:15:15,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:15:15,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:15:15,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:15:15,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:15:15,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:15:15,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:15:15,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:15:15,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:15:15,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:15:15,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:15:15,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:15:15,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:15:15,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:15:15,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:15:15,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:15:15,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:15:15,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:15:15,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:15:15,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:15:15,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:15:15,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:15:15,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:15:15,236 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:15:15,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:15:15,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:15:15,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:15:15,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:15:15,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:15:15,241 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:15:15,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:15:15,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:15:15,241 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:15:15,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:15:15,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:15:15,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:15:15,243 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:15:15,243 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:15:15,244 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:15:15,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:15:15,244 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:15:15,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:15:15,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:15:15,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:15:15,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:15:15,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:15:15,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:15:15,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:15:15,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:15:15,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:15:15,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:15:15,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:15:15,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4099afe4d4ae3c88800047494721799286636d7a [2021-08-27 05:15:15,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:15:15,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:15:15,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:15:15,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:15:15,595 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:15:15,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-08-27 05:15:15,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac51359b/a61c203344e0460695677f3d1e5fc486/FLAG66b03a09a [2021-08-27 05:15:16,142 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:15:16,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-08-27 05:15:16,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac51359b/a61c203344e0460695677f3d1e5fc486/FLAG66b03a09a [2021-08-27 05:15:16,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ac51359b/a61c203344e0460695677f3d1e5fc486 [2021-08-27 05:15:16,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:15:16,555 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:15:16,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:15:16,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:15:16,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:15:16,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d4e0a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16, skipping insertion in model container [2021-08-27 05:15:16,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:15:16,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:15:16,689 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/elimination_max_rec_onepoint.c[502,515] [2021-08-27 05:15:16,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:15:16,718 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:15:16,739 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/elimination_max_rec_onepoint.c[502,515] [2021-08-27 05:15:16,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:15:16,780 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:15:16,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16 WrapperNode [2021-08-27 05:15:16,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:15:16,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:15:16,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:15:16,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:15:16,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:15:16,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:15:16,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:15:16,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:15:16,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (1/1) ... [2021-08-27 05:15:16,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:15:16,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:16,876 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 05:15:16,878 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 05:15:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:15:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:15:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:15:16,910 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-08-27 05:15:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-08-27 05:15:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-08-27 05:15:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:15:16,911 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-08-27 05:15:16,911 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:15:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:15:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:15:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:15:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:15:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:15:16,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:15:16,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:15:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:15:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:15:17,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:15:17,342 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-27 05:15:17,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:15:17 BoogieIcfgContainer [2021-08-27 05:15:17,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:15:17,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:15:17,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:15:17,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:15:17,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:15:16" (1/3) ... [2021-08-27 05:15:17,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fdbff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:15:17, skipping insertion in model container [2021-08-27 05:15:17,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:15:16" (2/3) ... [2021-08-27 05:15:17,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fdbff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:15:17, skipping insertion in model container [2021-08-27 05:15:17,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:15:17" (3/3) ... [2021-08-27 05:15:17,352 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-08-27 05:15:17,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:15:17,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-08-27 05:15:17,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:15:17,400 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 05:15:17,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-08-27 05:15:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 55 states have internal predecessors, (59), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-08-27 05:15:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:15:17,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:17,421 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, 1, 1] [2021-08-27 05:15:17,421 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:17,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:17,426 INFO L82 PathProgramCache]: Analyzing trace with hash -404481820, now seen corresponding path program 1 times [2021-08-27 05:15:17,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:17,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143547419] [2021-08-27 05:15:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:17,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:17,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:17,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:17,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:17,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:17,718 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 05:15:17,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:17,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143547419] [2021-08-27 05:15:17,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143547419] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:17,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:15:17,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674802945] [2021-08-27 05:15:17,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:15:17,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:15:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:15:17,739 INFO L87 Difference]: Start difference. First operand has 73 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 55 states have internal predecessors, (59), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:15:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:17,995 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-08-27 05:15:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:15:17,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-08-27 05:15:17,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:18,003 INFO L225 Difference]: With dead ends: 73 [2021-08-27 05:15:18,004 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 05:15:18,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:15:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 05:15:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-27 05:15:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 53 states have internal predecessors, (55), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-08-27 05:15:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-08-27 05:15:18,051 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 30 [2021-08-27 05:15:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:18,051 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-08-27 05:15:18,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 05:15:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-08-27 05:15:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:15:18,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:18,055 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, 1, 1] [2021-08-27 05:15:18,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:15:18,055 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:18,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1206695456, now seen corresponding path program 1 times [2021-08-27 05:15:18,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:18,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944415988] [2021-08-27 05:15:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:18,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:18,340 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 05:15:18,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:18,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944415988] [2021-08-27 05:15:18,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944415988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:18,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:18,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:15:18,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085153342] [2021-08-27 05:15:18,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:15:18,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:15:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:15:18,345 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 05:15:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:18,984 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2021-08-27 05:15:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:15:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 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 05:15:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:18,987 INFO L225 Difference]: With dead ends: 114 [2021-08-27 05:15:18,988 INFO L226 Difference]: Without dead ends: 114 [2021-08-27 05:15:18,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-27 05:15:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-27 05:15:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2021-08-27 05:15:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 53 states have (on average 1.528301886792453) internal successors, (81), 70 states have internal predecessors, (81), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-08-27 05:15:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2021-08-27 05:15:19,010 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 30 [2021-08-27 05:15:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:19,012 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2021-08-27 05:15:19,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 05:15:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2021-08-27 05:15:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:15:19,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:19,016 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, 1, 1] [2021-08-27 05:15:19,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:15:19,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1208436753, now seen corresponding path program 1 times [2021-08-27 05:15:19,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:19,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294506845] [2021-08-27 05:15:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:19,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:15:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,181 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 05:15:19,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:19,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294506845] [2021-08-27 05:15:19,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294506845] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:19,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:19,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:15:19,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745747401] [2021-08-27 05:15:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:15:19,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:15:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:15:19,184 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:15:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:19,453 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-08-27 05:15:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:15:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-08-27 05:15:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:19,458 INFO L225 Difference]: With dead ends: 90 [2021-08-27 05:15:19,459 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 05:15:19,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:15:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 05:15:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-27 05:15:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.471698113207547) internal successors, (78), 67 states have internal predecessors, (78), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-08-27 05:15:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2021-08-27 05:15:19,480 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 30 [2021-08-27 05:15:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:19,480 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2021-08-27 05:15:19,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:15:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2021-08-27 05:15:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 05:15:19,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:19,484 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, 1, 1] [2021-08-27 05:15:19,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:15:19,484 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1208436752, now seen corresponding path program 1 times [2021-08-27 05:15:19,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:19,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080919355] [2021-08-27 05:15:19,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:19,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:15:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:19,719 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 05:15:19,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:19,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080919355] [2021-08-27 05:15:19,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080919355] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:19,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:19,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 05:15:19,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855264673] [2021-08-27 05:15:19,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:15:19,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:19,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:15:19,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:15:19,723 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:15:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:20,221 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2021-08-27 05:15:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:15:20,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2021-08-27 05:15:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:20,223 INFO L225 Difference]: With dead ends: 88 [2021-08-27 05:15:20,223 INFO L226 Difference]: Without dead ends: 88 [2021-08-27 05:15:20,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:15:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-27 05:15:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-08-27 05:15:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 65 states have internal predecessors, (76), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-08-27 05:15:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2021-08-27 05:15:20,230 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 30 [2021-08-27 05:15:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:20,231 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2021-08-27 05:15:20,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:15:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2021-08-27 05:15:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 05:15:20,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:20,232 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, 1, 1, 1, 1] [2021-08-27 05:15:20,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:15:20,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1666549967, now seen corresponding path program 1 times [2021-08-27 05:15:20,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:20,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277177507] [2021-08-27 05:15:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:20,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:20,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:20,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:20,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:20,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:20,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:15:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:20,400 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 05:15:20,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:20,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277177507] [2021-08-27 05:15:20,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277177507] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:20,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:20,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 05:15:20,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951134383] [2021-08-27 05:15:20,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 05:15:20,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 05:15:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:15:20,402 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:15:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:21,052 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2021-08-27 05:15:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 05:15:21,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-08-27 05:15:21,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:21,054 INFO L225 Difference]: With dead ends: 127 [2021-08-27 05:15:21,054 INFO L226 Difference]: Without dead ends: 127 [2021-08-27 05:15:21,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-27 05:15:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-27 05:15:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-08-27 05:15:21,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.396551724137931) internal successors, (81), 70 states have internal predecessors, (81), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-08-27 05:15:21,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-08-27 05:15:21,063 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 32 [2021-08-27 05:15:21,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:21,063 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-08-27 05:15:21,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-27 05:15:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-08-27 05:15:21,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 05:15:21,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:21,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:21,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:15:21,065 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:21,065 INFO L82 PathProgramCache]: Analyzing trace with hash 538307480, now seen corresponding path program 1 times [2021-08-27 05:15:21,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:21,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412323667] [2021-08-27 05:15:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:21,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:21,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:21,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:21,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:21,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:15:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:21,300 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 05:15:21,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:21,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412323667] [2021-08-27 05:15:21,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412323667] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:21,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:21,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 05:15:21,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566877272] [2021-08-27 05:15:21,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 05:15:21,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 05:15:21,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-08-27 05:15:21,303 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 05:15:21,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:21,981 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2021-08-27 05:15:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 05:15:21,985 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-08-27 05:15:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:21,986 INFO L225 Difference]: With dead ends: 98 [2021-08-27 05:15:21,986 INFO L226 Difference]: Without dead ends: 98 [2021-08-27 05:15:21,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-27 05:15:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-27 05:15:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-08-27 05:15:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 61 states have (on average 1.3770491803278688) internal successors, (84), 73 states have internal predecessors, (84), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-08-27 05:15:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2021-08-27 05:15:21,993 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 37 [2021-08-27 05:15:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:21,993 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2021-08-27 05:15:21,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-27 05:15:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2021-08-27 05:15:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 05:15:21,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:21,994 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] [2021-08-27 05:15:21,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:15:21,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:21,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1956778269, now seen corresponding path program 1 times [2021-08-27 05:15:21,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:21,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116520484] [2021-08-27 05:15:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:21,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:22,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,101 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 05:15:22,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:22,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116520484] [2021-08-27 05:15:22,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116520484] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:22,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:22,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 05:15:22,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151113890] [2021-08-27 05:15:22,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:15:22,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:22,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:15:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:15:22,104 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:22,398 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-08-27 05:15:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:15:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-08-27 05:15:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:22,401 INFO L225 Difference]: With dead ends: 94 [2021-08-27 05:15:22,401 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 05:15:22,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:15:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 05:15:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-08-27 05:15:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 69 states have internal predecessors, (76), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-08-27 05:15:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2021-08-27 05:15:22,409 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 38 [2021-08-27 05:15:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:22,410 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2021-08-27 05:15:22,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2021-08-27 05:15:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 05:15:22,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:22,411 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] [2021-08-27 05:15:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 05:15:22,412 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1956778268, now seen corresponding path program 1 times [2021-08-27 05:15:22,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:22,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473789858] [2021-08-27 05:15:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:22,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:22,576 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 05:15:22,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:22,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473789858] [2021-08-27 05:15:22,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473789858] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:22,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:22,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:15:22,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200833451] [2021-08-27 05:15:22,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 05:15:22,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 05:15:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:15:22,579 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:23,131 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2021-08-27 05:15:23,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:15:23,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-08-27 05:15:23,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:23,133 INFO L225 Difference]: With dead ends: 108 [2021-08-27 05:15:23,133 INFO L226 Difference]: Without dead ends: 108 [2021-08-27 05:15:23,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:15:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-27 05:15:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-08-27 05:15:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 69 states have internal predecessors, (75), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-08-27 05:15:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-08-27 05:15:23,139 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 38 [2021-08-27 05:15:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:23,139 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-08-27 05:15:23,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-08-27 05:15:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 05:15:23,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:23,140 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 05:15:23,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:15:23,141 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash -530584177, now seen corresponding path program 1 times [2021-08-27 05:15:23,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:23,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532849137] [2021-08-27 05:15:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:23,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:23,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:23,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:23,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:23,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:23,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:23,345 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 05:15:23,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:23,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532849137] [2021-08-27 05:15:23,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532849137] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:23,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:23,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 05:15:23,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576619034] [2021-08-27 05:15:23,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:15:23,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:15:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:15:23,347 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:23,962 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-08-27 05:15:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 05:15:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-08-27 05:15:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:23,963 INFO L225 Difference]: With dead ends: 107 [2021-08-27 05:15:23,963 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 05:15:23,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-27 05:15:23,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 05:15:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-08-27 05:15:23,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 69 states have internal predecessors, (74), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-08-27 05:15:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2021-08-27 05:15:23,968 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 39 [2021-08-27 05:15:23,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:23,969 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2021-08-27 05:15:23,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2021-08-27 05:15:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 05:15:23,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:23,970 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:23,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 05:15:23,970 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash -685811321, now seen corresponding path program 1 times [2021-08-27 05:15:23,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:23,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231371125] [2021-08-27 05:15:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:23,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:15:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-08-27 05:15:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,071 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 05:15:24,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:24,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231371125] [2021-08-27 05:15:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231371125] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:24,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:24,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:15:24,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898474440] [2021-08-27 05:15:24,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:15:24,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:24,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:15:24,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:15:24,078 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:24,272 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-08-27 05:15:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:15:24,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-08-27 05:15:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:24,273 INFO L225 Difference]: With dead ends: 93 [2021-08-27 05:15:24,274 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 05:15:24,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:15:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 05:15:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-08-27 05:15:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 68 states have internal predecessors, (73), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2021-08-27 05:15:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-08-27 05:15:24,279 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 40 [2021-08-27 05:15:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:24,279 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-08-27 05:15:24,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-08-27 05:15:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-08-27 05:15:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-27 05:15:24,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:24,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:24,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 05:15:24,281 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr7ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1934681174, now seen corresponding path program 1 times [2021-08-27 05:15:24,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:24,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054894733] [2021-08-27 05:15:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:24,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:15:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-08-27 05:15:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,390 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 05:15:24,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:24,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054894733] [2021-08-27 05:15:24,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054894733] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:24,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:15:24,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:15:24,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155434730] [2021-08-27 05:15:24,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:15:24,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:15:24,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:15:24,392 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 05:15:24,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:24,622 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2021-08-27 05:15:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:15:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2021-08-27 05:15:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:24,625 INFO L225 Difference]: With dead ends: 92 [2021-08-27 05:15:24,626 INFO L226 Difference]: Without dead ends: 78 [2021-08-27 05:15:24,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:15:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-27 05:15:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-08-27 05:15:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 56 states have internal predecessors, (60), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-08-27 05:15:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-08-27 05:15:24,631 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 42 [2021-08-27 05:15:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:24,632 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-08-27 05:15:24,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-08-27 05:15:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-08-27 05:15:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:15:24,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:24,635 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:24,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 05:15:24,635 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:24,636 INFO L82 PathProgramCache]: Analyzing trace with hash 424622284, now seen corresponding path program 1 times [2021-08-27 05:15:24,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:24,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623741336] [2021-08-27 05:15:24,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:24,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:15:24,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:24,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623741336] [2021-08-27 05:15:24,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623741336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:24,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681318680] [2021-08-27 05:15:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:24,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:24,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:24,805 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 05:15:24,807 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 05:15:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 05:15:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:15:25,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681318680] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:25,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:15:25,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2021-08-27 05:15:25,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739760270] [2021-08-27 05:15:25,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:15:25,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:25,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:15:25,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-27 05:15:25,264 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-27 05:15:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:25,429 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-08-27 05:15:25,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:15:25,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-08-27 05:15:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:25,431 INFO L225 Difference]: With dead ends: 95 [2021-08-27 05:15:25,431 INFO L226 Difference]: Without dead ends: 95 [2021-08-27 05:15:25,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:15:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-27 05:15:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-08-27 05:15:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 59 states have internal predecessors, (63), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-08-27 05:15:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-08-27 05:15:25,438 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 47 [2021-08-27 05:15:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:25,438 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-08-27 05:15:25,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-27 05:15:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-08-27 05:15:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 05:15:25,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:25,440 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] [2021-08-27 05:15:25,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:25,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-27 05:15:25,657 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash 422889924, now seen corresponding path program 1 times [2021-08-27 05:15:25,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:25,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060231905] [2021-08-27 05:15:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:25,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 05:15:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:15:25,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:25,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060231905] [2021-08-27 05:15:25,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060231905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:25,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096348569] [2021-08-27 05:15:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:25,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:25,893 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 05:15:25,915 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 05:15:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 05:15:26,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:15:26,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096348569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:26,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:26,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-27 05:15:26,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759352780] [2021-08-27 05:15:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 05:15:26,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 05:15:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-08-27 05:15:26,689 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-27 05:15:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:28,151 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2021-08-27 05:15:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 05:15:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 47 [2021-08-27 05:15:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:28,153 INFO L225 Difference]: With dead ends: 146 [2021-08-27 05:15:28,153 INFO L226 Difference]: Without dead ends: 144 [2021-08-27 05:15:28,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1023.3ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 05:15:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-27 05:15:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 118. [2021-08-27 05:15:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 85 states have internal predecessors, (95), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-08-27 05:15:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2021-08-27 05:15:28,160 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 47 [2021-08-27 05:15:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:28,160 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2021-08-27 05:15:28,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 13 states have internal predecessors, (43), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2021-08-27 05:15:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2021-08-27 05:15:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 05:15:28,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:28,161 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] [2021-08-27 05:15:28,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:15:28,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-27 05:15:28,380 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:28,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1624676123, now seen corresponding path program 1 times [2021-08-27 05:15:28,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:28,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4487484] [2021-08-27 05:15:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:28,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 05:15:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:15:28,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:28,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4487484] [2021-08-27 05:15:28,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4487484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:28,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907981801] [2021-08-27 05:15:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:28,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:28,649 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 05:15:28,679 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 05:15:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-27 05:15:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:15:29,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907981801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:29,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:29,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-08-27 05:15:29,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925581742] [2021-08-27 05:15:29,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 05:15:29,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 05:15:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-08-27 05:15:29,537 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-08-27 05:15:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:32,543 INFO L93 Difference]: Finished difference Result 213 states and 261 transitions. [2021-08-27 05:15:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-27 05:15:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 49 [2021-08-27 05:15:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:32,547 INFO L225 Difference]: With dead ends: 213 [2021-08-27 05:15:32,547 INFO L226 Difference]: Without dead ends: 213 [2021-08-27 05:15:32,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2265.7ms TimeCoverageRelationStatistics Valid=499, Invalid=2581, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 05:15:32,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-27 05:15:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 147. [2021-08-27 05:15:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 101 states have (on average 1.198019801980198) internal successors, (121), 108 states have internal predecessors, (121), 26 states have call successors, (26), 13 states have call predecessors, (26), 14 states have return successors, (31), 25 states have call predecessors, (31), 25 states have call successors, (31) [2021-08-27 05:15:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2021-08-27 05:15:32,562 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 49 [2021-08-27 05:15:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:32,562 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2021-08-27 05:15:32,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 9 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-08-27 05:15:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2021-08-27 05:15:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 05:15:32,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:32,564 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] [2021-08-27 05:15:32,589 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 05:15:32,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:32,777 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2017703133, now seen corresponding path program 1 times [2021-08-27 05:15:32,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:32,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960594355] [2021-08-27 05:15:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:32,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 05:15:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:15:32,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:32,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960594355] [2021-08-27 05:15:32,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960594355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:32,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149940337] [2021-08-27 05:15:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:32,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:32,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:32,953 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 05:15:32,985 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 05:15:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 05:15:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:33,216 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 05:15:35,287 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3))) is different from true [2021-08-27 05:15:37,335 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4))) is different from true [2021-08-27 05:15:37,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-27 05:15:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:15:37,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149940337] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:15:37,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:15:37,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 16 [2021-08-27 05:15:37,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41537891] [2021-08-27 05:15:37,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 05:15:37,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:37,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 05:15:37,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=155, Unknown=2, NotChecked=50, Total=240 [2021-08-27 05:15:37,484 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 05:15:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:37,635 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-08-27 05:15:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 05:15:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 49 [2021-08-27 05:15:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:37,637 INFO L225 Difference]: With dead ends: 96 [2021-08-27 05:15:37,637 INFO L226 Difference]: Without dead ends: 96 [2021-08-27 05:15:37,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4214.8ms TimeCoverageRelationStatistics Valid=48, Invalid=230, Unknown=2, NotChecked=62, Total=342 [2021-08-27 05:15:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-27 05:15:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-08-27 05:15:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-08-27 05:15:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-08-27 05:15:37,640 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 49 [2021-08-27 05:15:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:37,641 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-08-27 05:15:37,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 05:15:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-08-27 05:15:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-27 05:15:37,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:37,641 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:37,666 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 05:15:37,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 05:15:37,864 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:15:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:15:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1905730051, now seen corresponding path program 1 times [2021-08-27 05:15:37,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:15:37,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401649827] [2021-08-27 05:15:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:37,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:15:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:15:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:15:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:15:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:15:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:15:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:15:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 05:15:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 05:15:38,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:15:38,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401649827] [2021-08-27 05:15:38,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401649827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:38,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761185230] [2021-08-27 05:15:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:15:38,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:15:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:15:38,153 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 05:15:38,154 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 05:15:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:15:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 05:15:38,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:15:38,421 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 05:15:40,461 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2021-08-27 05:15:42,502 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_6 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_6))) is different from true [2021-08-27 05:15:44,556 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_7 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_7))) is different from true [2021-08-27 05:15:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-27 05:15:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2021-08-27 05:15:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761185230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:15:44,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:15:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-08-27 05:15:44,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960825857] [2021-08-27 05:15:44,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 05:15:44,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:15:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 05:15:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=415, Unknown=3, NotChecked=126, Total=600 [2021-08-27 05:15:44,826 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-27 05:15:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:15:59,847 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-08-27 05:15:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 05:15:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 54 [2021-08-27 05:15:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:15:59,849 INFO L225 Difference]: With dead ends: 94 [2021-08-27 05:15:59,849 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 05:15:59,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 20863.9ms TimeCoverageRelationStatistics Valid=172, Invalid=1023, Unknown=7, NotChecked=204, Total=1406 [2021-08-27 05:15:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 05:15:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-08-27 05:15:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2021-08-27 05:15:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-08-27 05:15:59,853 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 54 [2021-08-27 05:15:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:15:59,853 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-08-27 05:15:59,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 5 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-27 05:15:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-08-27 05:15:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 05:15:59,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:15:59,854 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:15:59,882 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 05:16:00,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-27 05:16:00,072 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:16:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:16:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash -807259696, now seen corresponding path program 1 times [2021-08-27 05:16:00,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:16:00,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573610827] [2021-08-27 05:16:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:00,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:16:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:16:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:16:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:16:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:16:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:16:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:16:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-08-27 05:16:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-08-27 05:16:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 05:16:00,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:16:00,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573610827] [2021-08-27 05:16:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573610827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:00,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270171335] [2021-08-27 05:16:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:00,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:16:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:16:00,297 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 05:16:00,298 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 05:16:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:00,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 05:16:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:16:00,572 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 05:16:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:16:01,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270171335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:01,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:16:01,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-27 05:16:01,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720264432] [2021-08-27 05:16:01,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 05:16:01,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:16:01,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 05:16:01,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2021-08-27 05:16:01,809 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-08-27 05:16:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:16:03,244 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2021-08-27 05:16:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 05:16:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 55 [2021-08-27 05:16:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:16:03,245 INFO L225 Difference]: With dead ends: 112 [2021-08-27 05:16:03,246 INFO L226 Difference]: Without dead ends: 112 [2021-08-27 05:16:03,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1513.6ms TimeCoverageRelationStatistics Valid=233, Invalid=956, Unknown=1, NotChecked=0, Total=1190 [2021-08-27 05:16:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-27 05:16:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-08-27 05:16:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 74 states have internal predecessors, (77), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-08-27 05:16:03,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-08-27 05:16:03,249 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 55 [2021-08-27 05:16:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:16:03,249 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-08-27 05:16:03,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 12 states have internal predecessors, (49), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-08-27 05:16:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-08-27 05:16:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 05:16:03,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:16:03,250 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:16:03,273 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 05:16:03,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 05:16:03,450 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:16:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:16:03,451 INFO L82 PathProgramCache]: Analyzing trace with hash 744753187, now seen corresponding path program 1 times [2021-08-27 05:16:03,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:16:03,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386970331] [2021-08-27 05:16:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:03,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:16:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:16:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:16:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:16:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:16:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:16:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:16:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-08-27 05:16:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-08-27 05:16:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 05:16:03,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:16:03,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386970331] [2021-08-27 05:16:03,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386970331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:03,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32022086] [2021-08-27 05:16:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:03,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:16:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:16:03,697 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 05:16:03,706 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 05:16:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 05:16:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:16:04,065 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 05:16:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-27 05:16:04,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32022086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:04,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:16:04,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-27 05:16:04,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942310235] [2021-08-27 05:16:04,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 05:16:04,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:16:04,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 05:16:04,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-27 05:16:04,926 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-08-27 05:16:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:16:06,485 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-08-27 05:16:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 05:16:06,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 56 [2021-08-27 05:16:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:16:06,486 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:16:06,486 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 05:16:06,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1247.6ms TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 05:16:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 05:16:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2021-08-27 05:16:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-08-27 05:16:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-08-27 05:16:06,491 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 56 [2021-08-27 05:16:06,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:16:06,491 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-08-27 05:16:06,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-08-27 05:16:06,492 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-08-27 05:16:06,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 05:16:06,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:16:06,492 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, 1, 1, 1, 1, 1] [2021-08-27 05:16:06,519 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 05:16:06,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:16:06,713 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:16:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:16:06,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1851163875, now seen corresponding path program 1 times [2021-08-27 05:16:06,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:16:06,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817286986] [2021-08-27 05:16:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:06,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:16:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:16:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:16:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:06,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:16:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:06,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:16:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:06,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-08-27 05:16:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:07,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 05:16:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:07,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 05:16:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:07,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-08-27 05:16:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:16:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 05:16:07,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:16:07,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817286986] [2021-08-27 05:16:07,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817286986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:07,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504492817] [2021-08-27 05:16:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:07,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:16:07,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:16:07,081 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 05:16:07,085 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 05:16:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-27 05:16:07,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:16:07,475 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 05:16:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 05:16:09,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504492817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:09,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:16:09,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-08-27 05:16:09,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740811159] [2021-08-27 05:16:09,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 05:16:09,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:16:09,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 05:16:09,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=630, Unknown=1, NotChecked=0, Total=702 [2021-08-27 05:16:09,156 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-08-27 05:16:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:16:11,426 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2021-08-27 05:16:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-27 05:16:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 62 [2021-08-27 05:16:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:16:11,428 INFO L225 Difference]: With dead ends: 113 [2021-08-27 05:16:11,428 INFO L226 Difference]: Without dead ends: 89 [2021-08-27 05:16:11,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2270.4ms TimeCoverageRelationStatistics Valid=269, Invalid=1710, Unknown=1, NotChecked=0, Total=1980 [2021-08-27 05:16:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-27 05:16:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-08-27 05:16:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 58 states have internal predecessors, (61), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-08-27 05:16:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-08-27 05:16:11,431 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 62 [2021-08-27 05:16:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:16:11,432 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-08-27 05:16:11,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2021-08-27 05:16:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-08-27 05:16:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-27 05:16:11,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:16:11,433 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:16:11,455 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 05:16:11,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:16:11,641 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 12 more)] === [2021-08-27 05:16:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:16:11,641 INFO L82 PathProgramCache]: Analyzing trace with hash -619591727, now seen corresponding path program 1 times [2021-08-27 05:16:11,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:16:11,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939296352] [2021-08-27 05:16:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:11,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:16:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:11,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:16:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:11,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 05:16:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:11,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 05:16:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:11,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-08-27 05:16:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:11,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:16:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:11,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-08-27 05:16:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:11,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 05:16:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:12,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 05:16:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:12,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 05:16:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:12,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-08-27 05:16:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:12,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-08-27 05:16:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-08-27 05:16:12,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:16:12,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939296352] [2021-08-27 05:16:12,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939296352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:12,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984157913] [2021-08-27 05:16:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:16:12,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:16:12,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:16:12,069 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:16:12,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 05:16:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:16:12,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-27 05:16:12,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:16:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-27 05:16:13,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984157913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:16:13,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:16:13,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2021-08-27 05:16:13,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448703455] [2021-08-27 05:16:13,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 05:16:13,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:16:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 05:16:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2021-08-27 05:16:13,251 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2021-08-27 05:16:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:16:15,646 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-08-27 05:16:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 05:16:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) Word has length 79 [2021-08-27 05:16:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:16:15,648 INFO L225 Difference]: With dead ends: 88 [2021-08-27 05:16:15,648 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 05:16:15,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2281.5ms TimeCoverageRelationStatistics Valid=410, Invalid=2452, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 05:16:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 05:16:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 05:16:15,649 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 05:16:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 05:16:15,649 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-08-27 05:16:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:16:15,650 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 05:16:15,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 14 states have call successors, (22), 5 states have call predecessors, (22), 4 states have return successors, (18), 11 states have call predecessors, (18), 12 states have call successors, (18) [2021-08-27 05:16:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 05:16:15,650 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 05:16:15,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:16:15,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:16:15,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:16:15,653 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:16:15,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:16:15,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:16:15,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:16:15,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:16:15,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATION [2021-08-27 05:16:15,654 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATION [2021-08-27 05:16:15,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATION [2021-08-27 05:16:15,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATION [2021-08-27 05:16:15,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATION [2021-08-27 05:16:15,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATION [2021-08-27 05:16:15,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATION [2021-08-27 05:16:15,655 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATION [2021-08-27 05:16:15,656 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 05:16:15,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 05:16:15,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:16:15,873 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:16:15,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:16:15 BoogieIcfgContainer [2021-08-27 05:16:15,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:16:15,876 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:16:15,876 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:16:15,876 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:16:15,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:15:17" (3/4) ... [2021-08-27 05:16:15,880 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 05:16:15,887 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 05:16:15,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 05:16:15,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-08-27 05:16:15,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 05:16:15,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-08-27 05:16:15,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-08-27 05:16:15,889 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2021-08-27 05:16:15,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-08-27 05:16:15,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-27 05:16:15,900 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-27 05:16:15,901 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:16:15,942 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:16:15,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:16:15,944 INFO L168 Benchmark]: Toolchain (without parser) took 59388.07 ms. Allocated memory was 58.7 MB in the beginning and 220.2 MB in the end (delta: 161.5 MB). Free memory was 37.2 MB in the beginning and 101.7 MB in the end (delta: -64.4 MB). Peak memory consumption was 99.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:16:15,944 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 50.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:16:15,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.21 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 42.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:16:15,945 INFO L168 Benchmark]: Boogie Preprocessor took 63.27 ms. Allocated memory is still 58.7 MB. Free memory was 42.0 MB in the beginning and 40.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:16:15,946 INFO L168 Benchmark]: RCFGBuilder took 494.71 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 40.3 MB in the beginning and 45.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:16:15,946 INFO L168 Benchmark]: TraceAbstraction took 58529.22 ms. Allocated memory was 71.3 MB in the beginning and 220.2 MB in the end (delta: 148.9 MB). Free memory was 44.8 MB in the beginning and 105.3 MB in the end (delta: -60.5 MB). Peak memory consumption was 88.3 MB. Max. memory is 16.1 GB. [2021-08-27 05:16:15,946 INFO L168 Benchmark]: Witness Printer took 66.43 ms. Allocated memory is still 220.2 MB. Free memory was 105.3 MB in the beginning and 101.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:16:15,948 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 50.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 227.21 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 42.0 MB in the end (delta: -4.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.27 ms. Allocated memory is still 58.7 MB. Free memory was 42.0 MB in the beginning and 40.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 494.71 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 40.3 MB in the beginning and 45.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58529.22 ms. Allocated memory was 71.3 MB in the beginning and 220.2 MB in the end (delta: 148.9 MB). Free memory was 44.8 MB in the beginning and 105.3 MB in the end (delta: -60.5 MB). Peak memory consumption was 88.3 MB. Max. memory is 16.1 GB. * Witness Printer took 66.43 ms. Allocated memory is still 220.2 MB. Free memory was 105.3 MB in the beginning and 101.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 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: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 49]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 33]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 34]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: 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 8 procedures, 76 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 58479.5ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 27.7ms, AutomataDifference: 32435.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 843 SDtfs, 3015 SDslu, 1733 SDs, 0 SdLazy, 9740 SolverSat, 1630 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 7501.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1125 GetRequests, 653 SyntacticMatches, 27 SemanticMatches, 445 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 37826.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=14, InterpolantAutomatonStates: 291, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 162.4ms AutomataMinimizationTime, 20 MinimizatonAttempts, 209 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 139.3ms SsaConstructionTime, 596.9ms SatisfiabilityAnalysisTime, 21139.0ms InterpolantComputationTime, 1382 NumberOfCodeBlocks, 1382 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1353 ConstructedInterpolants, 109 QuantifiedInterpolants, 7625 SizeOfPredicates, 72 NumberOfNonLiveVariables, 2298 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 29 InterpolantComputations, 13 PerfectInterpolantSequences, 418/506 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 05:16:15,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...