./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/elimination_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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.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 b909735efeb9bc00b7df4035956af92a753b9076 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 17:59:33,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 17:59:33,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 17:59:33,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 17:59:33,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 17:59:33,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 17:59:33,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 17:59:33,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 17:59:33,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 17:59:33,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 17:59:33,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 17:59:33,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 17:59:33,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 17:59:33,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 17:59:33,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 17:59:33,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 17:59:33,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 17:59:33,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 17:59:33,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 17:59:33,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 17:59:33,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 17:59:33,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 17:59:33,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 17:59:33,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 17:59:33,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 17:59:33,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 17:59:33,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 17:59:33,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 17:59:33,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 17:59:33,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 17:59:33,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 17:59:33,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 17:59:33,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 17:59:33,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 17:59:33,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 17:59:33,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 17:59:33,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 17:59:33,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 17:59:33,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 17:59:33,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 17:59:33,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 17:59:33,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 17:59:33,543 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 17:59:33,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 17:59:33,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 17:59:33,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 17:59:33,546 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 17:59:33,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 17:59:33,547 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 17:59:33,547 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 17:59:33,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 17:59:33,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 17:59:33,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 17:59:33,549 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 17:59:33,549 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 17:59:33,550 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 17:59:33,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 17:59:33,550 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 17:59:33,551 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 17:59:33,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 17:59:33,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 17:59:33,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 17:59:33,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 17:59:33,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 17:59:33,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:59:33,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 17:59:33,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 17:59:33,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 17:59:33,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 17:59:33,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 17:59:33,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> b909735efeb9bc00b7df4035956af92a753b9076 [2020-10-19 17:59:33,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 17:59:33,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 17:59:33,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 17:59:33,889 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 17:59:33,890 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 17:59:33,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max.c [2020-10-19 17:59:33,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af66093b/9a03392df8ac40c6af89b1d265c5781b/FLAGa628340d4 [2020-10-19 17:59:34,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 17:59:34,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max.c [2020-10-19 17:59:34,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af66093b/9a03392df8ac40c6af89b1d265c5781b/FLAGa628340d4 [2020-10-19 17:59:34,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af66093b/9a03392df8ac40c6af89b1d265c5781b [2020-10-19 17:59:34,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 17:59:34,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 17:59:34,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 17:59:34,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 17:59:34,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 17:59:34,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:59:34" (1/1) ... [2020-10-19 17:59:34,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28684e28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:34, skipping insertion in model container [2020-10-19 17:59:34,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:59:34" (1/1) ... [2020-10-19 17:59:34,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 17:59:34,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 17:59:35,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:59:35,067 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 17:59:35,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:59:35,164 INFO L208 MainTranslator]: Completed translation [2020-10-19 17:59:35,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35 WrapperNode [2020-10-19 17:59:35,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 17:59:35,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 17:59:35,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 17:59:35,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 17:59:35,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... [2020-10-19 17:59:35,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... [2020-10-19 17:59:35,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... [2020-10-19 17:59:35,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... [2020-10-19 17:59:35,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... [2020-10-19 17:59:35,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... [2020-10-19 17:59:35,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... [2020-10-19 17:59:35,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 17:59:35,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 17:59:35,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 17:59:35,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 17:59:35,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:59:35,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 17:59:35,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 17:59:35,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 17:59:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-19 17:59:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-19 17:59:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 17:59:35,288 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-19 17:59:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 17:59:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 17:59:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 17:59:35,290 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 17:59:35,291 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 17:59:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 17:59:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-19 17:59:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-19 17:59:35,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 17:59:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 17:59:35,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 17:59:35,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-19 17:59:35,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 17:59:35,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 17:59:35,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 17:59:35,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 17:59:35,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 17:59:35,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 17:59:35,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 17:59:35,745 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 17:59:35,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:35 BoogieIcfgContainer [2020-10-19 17:59:35,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 17:59:35,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 17:59:35,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 17:59:35,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 17:59:35,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 05:59:34" (1/3) ... [2020-10-19 17:59:35,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e4e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:35, skipping insertion in model container [2020-10-19 17:59:35,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:35" (2/3) ... [2020-10-19 17:59:35,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e4e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:35, skipping insertion in model container [2020-10-19 17:59:35,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:35" (3/3) ... [2020-10-19 17:59:35,756 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2020-10-19 17:59:35,767 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 17:59:35,774 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-10-19 17:59:35,785 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-10-19 17:59:35,804 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 17:59:35,804 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 17:59:35,805 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 17:59:35,805 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 17:59:35,805 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 17:59:35,805 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 17:59:35,805 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 17:59:35,805 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 17:59:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-19 17:59:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:59:35,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:35,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:35,835 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1105579330, now seen corresponding path program 1 times [2020-10-19 17:59:35,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:35,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739243957] [2020-10-19 17:59:35,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:36,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739243957] [2020-10-19 17:59:36,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:36,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:36,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55901291] [2020-10-19 17:59:36,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:59:36,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:59:36,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:36,147 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 4 states. [2020-10-19 17:59:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:36,377 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-10-19 17:59:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:59:36,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-19 17:59:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:36,390 INFO L225 Difference]: With dead ends: 63 [2020-10-19 17:59:36,391 INFO L226 Difference]: Without dead ends: 60 [2020-10-19 17:59:36,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-19 17:59:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-19 17:59:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 17:59:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-19 17:59:36,440 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 19 [2020-10-19 17:59:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:36,441 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-19 17:59:36,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:59:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-19 17:59:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:59:36,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:36,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:36,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 17:59:36,444 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:36,445 INFO L82 PathProgramCache]: Analyzing trace with hash -404514752, now seen corresponding path program 1 times [2020-10-19 17:59:36,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:36,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212145390] [2020-10-19 17:59:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:36,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212145390] [2020-10-19 17:59:36,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:36,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:36,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711167483] [2020-10-19 17:59:36,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:36,627 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 6 states. [2020-10-19 17:59:36,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:36,902 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-19 17:59:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 17:59:36,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-19 17:59:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:36,905 INFO L225 Difference]: With dead ends: 53 [2020-10-19 17:59:36,905 INFO L226 Difference]: Without dead ends: 53 [2020-10-19 17:59:36,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-19 17:59:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-19 17:59:36,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-19 17:59:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-19 17:59:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-19 17:59:36,915 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 19 [2020-10-19 17:59:36,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:36,917 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-19 17:59:36,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-19 17:59:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:59:36,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:36,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:36,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 17:59:36,919 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash -404514751, now seen corresponding path program 1 times [2020-10-19 17:59:36,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:36,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335235410] [2020-10-19 17:59:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:37,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335235410] [2020-10-19 17:59:37,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:37,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:59:37,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943861453] [2020-10-19 17:59:37,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:37,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:37,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:37,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:37,078 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 7 states. [2020-10-19 17:59:37,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:37,575 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2020-10-19 17:59:37,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:59:37,575 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-19 17:59:37,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:37,578 INFO L225 Difference]: With dead ends: 101 [2020-10-19 17:59:37,578 INFO L226 Difference]: Without dead ends: 101 [2020-10-19 17:59:37,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-19 17:59:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-10-19 17:59:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-19 17:59:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2020-10-19 17:59:37,592 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 19 [2020-10-19 17:59:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:37,592 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2020-10-19 17:59:37,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2020-10-19 17:59:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 17:59:37,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:37,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:37,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 17:59:37,594 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash 344944575, now seen corresponding path program 1 times [2020-10-19 17:59:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:37,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662783187] [2020-10-19 17:59:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662783187] [2020-10-19 17:59:37,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:37,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:59:37,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656177998] [2020-10-19 17:59:37,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:37,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:37,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:37,749 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 7 states. [2020-10-19 17:59:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:38,251 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2020-10-19 17:59:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 17:59:38,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-19 17:59:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:38,255 INFO L225 Difference]: With dead ends: 119 [2020-10-19 17:59:38,255 INFO L226 Difference]: Without dead ends: 119 [2020-10-19 17:59:38,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-19 17:59:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-19 17:59:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 87. [2020-10-19 17:59:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-19 17:59:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2020-10-19 17:59:38,268 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 20 [2020-10-19 17:59:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:38,268 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2020-10-19 17:59:38,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:38,268 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2020-10-19 17:59:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 17:59:38,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:38,270 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:38,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 17:59:38,270 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:38,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1612932601, now seen corresponding path program 1 times [2020-10-19 17:59:38,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:38,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264484654] [2020-10-19 17:59:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:38,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:38,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:38,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264484654] [2020-10-19 17:59:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290506883] [2020-10-19 17:59:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 17:59:38,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:38,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 17:59:38,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2020-10-19 17:59:38,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551569660] [2020-10-19 17:59:38,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:38,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:38,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:59:38,659 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand 7 states. [2020-10-19 17:59:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:38,976 INFO L93 Difference]: Finished difference Result 140 states and 167 transitions. [2020-10-19 17:59:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:59:38,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-19 17:59:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:38,978 INFO L225 Difference]: With dead ends: 140 [2020-10-19 17:59:38,978 INFO L226 Difference]: Without dead ends: 140 [2020-10-19 17:59:38,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-19 17:59:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-19 17:59:38,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-19 17:59:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-19 17:59:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2020-10-19 17:59:39,007 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 23 [2020-10-19 17:59:39,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:39,009 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2020-10-19 17:59:39,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2020-10-19 17:59:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 17:59:39,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:39,012 INFO L422 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] [2020-10-19 17:59:39,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:39,214 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash -569899624, now seen corresponding path program 1 times [2020-10-19 17:59:39,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:39,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189289373] [2020-10-19 17:59:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-19 17:59:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:39,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189289373] [2020-10-19 17:59:39,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:39,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-19 17:59:39,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328483371] [2020-10-19 17:59:39,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 17:59:39,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 17:59:39,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-19 17:59:39,420 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand 9 states. [2020-10-19 17:59:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:39,810 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2020-10-19 17:59:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 17:59:39,811 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-19 17:59:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:39,813 INFO L225 Difference]: With dead ends: 105 [2020-10-19 17:59:39,814 INFO L226 Difference]: Without dead ends: 105 [2020-10-19 17:59:39,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:59:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-19 17:59:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2020-10-19 17:59:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 17:59:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-10-19 17:59:39,836 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 25 [2020-10-19 17:59:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:39,837 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-10-19 17:59:39,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 17:59:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-10-19 17:59:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 17:59:39,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:39,839 INFO L422 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] [2020-10-19 17:59:39,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 17:59:39,841 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash -487019175, now seen corresponding path program 1 times [2020-10-19 17:59:39,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:39,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546938193] [2020-10-19 17:59:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-19 17:59:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 17:59:39,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546938193] [2020-10-19 17:59:39,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:39,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:59:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103596741] [2020-10-19 17:59:39,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:39,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:39,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:39,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:39,989 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 7 states. [2020-10-19 17:59:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:40,231 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2020-10-19 17:59:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:59:40,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-19 17:59:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:40,235 INFO L225 Difference]: With dead ends: 112 [2020-10-19 17:59:40,235 INFO L226 Difference]: Without dead ends: 112 [2020-10-19 17:59:40,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-19 17:59:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 75. [2020-10-19 17:59:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-19 17:59:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2020-10-19 17:59:40,250 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 26 [2020-10-19 17:59:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:40,251 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2020-10-19 17:59:40,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2020-10-19 17:59:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 17:59:40,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:40,253 INFO L422 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] [2020-10-19 17:59:40,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 17:59:40,254 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash 145092996, now seen corresponding path program 1 times [2020-10-19 17:59:40,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:40,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688218274] [2020-10-19 17:59:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-19 17:59:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 17:59:40,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688218274] [2020-10-19 17:59:40,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:40,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-19 17:59:40,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242111114] [2020-10-19 17:59:40,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 17:59:40,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 17:59:40,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:40,403 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand 11 states. [2020-10-19 17:59:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:40,826 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-19 17:59:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:59:40,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-19 17:59:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:40,828 INFO L225 Difference]: With dead ends: 79 [2020-10-19 17:59:40,829 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 17:59:40,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-19 17:59:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 17:59:40,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-19 17:59:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-19 17:59:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-10-19 17:59:40,834 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 31 [2020-10-19 17:59:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:40,835 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-10-19 17:59:40,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 17:59:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-10-19 17:59:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 17:59:40,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:40,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:40,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 17:59:40,838 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:40,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1105806991, now seen corresponding path program 1 times [2020-10-19 17:59:40,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:40,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559503489] [2020-10-19 17:59:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-19 17:59:40,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559503489] [2020-10-19 17:59:40,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282520314] [2020-10-19 17:59:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 17:59:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:41,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:41,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2020-10-19 17:59:41,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643407574] [2020-10-19 17:59:41,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 17:59:41,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:41,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 17:59:41,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:59:41,150 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 15 states. [2020-10-19 17:59:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:41,853 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-19 17:59:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 17:59:41,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-19 17:59:41,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:41,855 INFO L225 Difference]: With dead ends: 80 [2020-10-19 17:59:41,855 INFO L226 Difference]: Without dead ends: 80 [2020-10-19 17:59:41,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-10-19 17:59:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-19 17:59:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-10-19 17:59:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-19 17:59:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-19 17:59:41,860 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 28 [2020-10-19 17:59:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:41,861 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-19 17:59:41,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 17:59:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-19 17:59:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 17:59:41,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:41,862 INFO L422 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] [2020-10-19 17:59:42,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:42,073 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:42,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:42,073 INFO L82 PathProgramCache]: Analyzing trace with hash 708133075, now seen corresponding path program 1 times [2020-10-19 17:59:42,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:42,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850410262] [2020-10-19 17:59:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:42,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:42,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:42,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:42,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 17:59:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 17:59:42,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850410262] [2020-10-19 17:59:42,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841739965] [2020-10-19 17:59:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 17:59:42,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:42,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 17:59:42,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2020-10-19 17:59:42,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750723386] [2020-10-19 17:59:42,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 17:59:42,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:42,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 17:59:42,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:59:42,450 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 8 states. [2020-10-19 17:59:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:42,751 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-19 17:59:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 17:59:42,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-19 17:59:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:42,753 INFO L225 Difference]: With dead ends: 93 [2020-10-19 17:59:42,753 INFO L226 Difference]: Without dead ends: 93 [2020-10-19 17:59:42,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-10-19 17:59:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-19 17:59:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 60. [2020-10-19 17:59:42,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 17:59:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-10-19 17:59:42,757 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 30 [2020-10-19 17:59:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:42,758 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-10-19 17:59:42,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 17:59:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-10-19 17:59:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-19 17:59:42,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:42,760 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:42,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-19 17:59:42,969 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:42,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1809388562, now seen corresponding path program 1 times [2020-10-19 17:59:42,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:42,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116584001] [2020-10-19 17:59:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-19 17:59:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 17:59:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 17:59:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116584001] [2020-10-19 17:59:43,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:43,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-19 17:59:43,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143587899] [2020-10-19 17:59:43,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 17:59:43,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:43,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 17:59:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:43,113 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 11 states. [2020-10-19 17:59:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:43,537 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-19 17:59:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:59:43,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-19 17:59:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:43,542 INFO L225 Difference]: With dead ends: 57 [2020-10-19 17:59:43,542 INFO L226 Difference]: Without dead ends: 57 [2020-10-19 17:59:43,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-19 17:59:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-19 17:59:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-19 17:59:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-19 17:59:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-19 17:59:43,545 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 40 [2020-10-19 17:59:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:43,546 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-19 17:59:43,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 17:59:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-19 17:59:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-19 17:59:43,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:43,547 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-10-19 17:59:43,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 17:59:43,548 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1364625355, now seen corresponding path program 1 times [2020-10-19 17:59:43,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:43,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909888355] [2020-10-19 17:59:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-19 17:59:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 17:59:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-19 17:59:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 17:59:43,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909888355] [2020-10-19 17:59:43,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113375338] [2020-10-19 17:59:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:43,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 17:59:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 17:59:43,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 17:59:43,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2020-10-19 17:59:43,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712065391] [2020-10-19 17:59:43,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:43,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:43,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:43,790 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 6 states. [2020-10-19 17:59:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:43,884 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-19 17:59:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:43,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-10-19 17:59:43,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:43,885 INFO L225 Difference]: With dead ends: 77 [2020-10-19 17:59:43,885 INFO L226 Difference]: Without dead ends: 77 [2020-10-19 17:59:43,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:59:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-19 17:59:43,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-10-19 17:59:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-19 17:59:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-19 17:59:43,892 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 44 [2020-10-19 17:59:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:43,892 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-19 17:59:43,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-19 17:59:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-19 17:59:43,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:43,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:44,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:44,097 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash 646285478, now seen corresponding path program 1 times [2020-10-19 17:59:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:44,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783644] [2020-10-19 17:59:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-19 17:59:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 17:59:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-19 17:59:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-19 17:59:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783644] [2020-10-19 17:59:44,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:44,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:44,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218552819] [2020-10-19 17:59:44,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:44,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:44,182 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 6 states. [2020-10-19 17:59:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:44,356 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-19 17:59:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 17:59:44,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-19 17:59:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:44,358 INFO L225 Difference]: With dead ends: 67 [2020-10-19 17:59:44,359 INFO L226 Difference]: Without dead ends: 67 [2020-10-19 17:59:44,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-19 17:59:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-19 17:59:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-19 17:59:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-19 17:59:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2020-10-19 17:59:44,367 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 45 [2020-10-19 17:59:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:44,367 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2020-10-19 17:59:44,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2020-10-19 17:59:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-19 17:59:44,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:44,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:44,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 17:59:44,372 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1689910167, now seen corresponding path program 1 times [2020-10-19 17:59:44,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:44,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431738104] [2020-10-19 17:59:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-19 17:59:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 17:59:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-19 17:59:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-19 17:59:44,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431738104] [2020-10-19 17:59:44,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:44,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:59:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488455057] [2020-10-19 17:59:44,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:44,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:44,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:44,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:44,506 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 7 states. [2020-10-19 17:59:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:44,694 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-10-19 17:59:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:59:44,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-19 17:59:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:44,696 INFO L225 Difference]: With dead ends: 66 [2020-10-19 17:59:44,696 INFO L226 Difference]: Without dead ends: 45 [2020-10-19 17:59:44,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-19 17:59:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-19 17:59:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 17:59:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-19 17:59:44,701 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 47 [2020-10-19 17:59:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:44,701 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-19 17:59:44,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-19 17:59:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-19 17:59:44,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:44,702 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:44,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 17:59:44,703 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:44,703 INFO L82 PathProgramCache]: Analyzing trace with hash -130424529, now seen corresponding path program 1 times [2020-10-19 17:59:44,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:44,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279897274] [2020-10-19 17:59:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 17:59:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-19 17:59:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-19 17:59:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 17:59:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279897274] [2020-10-19 17:59:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092605494] [2020-10-19 17:59:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 17:59:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 17:59:45,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:45,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-10-19 17:59:45,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643847539] [2020-10-19 17:59:45,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-19 17:59:45,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:45,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 17:59:45,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-19 17:59:45,350 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2020-10-19 17:59:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:45,911 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-19 17:59:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 17:59:45,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-19 17:59:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:45,913 INFO L225 Difference]: With dead ends: 58 [2020-10-19 17:59:45,913 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 17:59:45,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-19 17:59:45,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 17:59:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-10-19 17:59:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-19 17:59:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-19 17:59:45,918 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 48 [2020-10-19 17:59:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:45,920 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-19 17:59:45,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-19 17:59:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-19 17:59:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-19 17:59:45,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:45,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1] [2020-10-19 17:59:46,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 17:59:46,123 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash -337131664, now seen corresponding path program 2 times [2020-10-19 17:59:46,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:46,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322641603] [2020-10-19 17:59:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-19 17:59:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-19 17:59:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-19 17:59:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-19 17:59:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-19 17:59:46,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322641603] [2020-10-19 17:59:46,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512711453] [2020-10-19 17:59:46,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:46,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:59:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 17:59:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-19 17:59:46,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:46,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2020-10-19 17:59:46,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562540748] [2020-10-19 17:59:46,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 17:59:46,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:46,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 17:59:46,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:59:46,409 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 15 states. [2020-10-19 17:59:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:46,724 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-19 17:59:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 17:59:46,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-19 17:59:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:46,726 INFO L225 Difference]: With dead ends: 77 [2020-10-19 17:59:46,726 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 17:59:46,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-19 17:59:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 17:59:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-19 17:59:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-19 17:59:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-19 17:59:46,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 58 [2020-10-19 17:59:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:46,730 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-19 17:59:46,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 17:59:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-19 17:59:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-19 17:59:46,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:46,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-19 17:59:46,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:46,939 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr15ENSURES_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:59:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash 484963050, now seen corresponding path program 3 times [2020-10-19 17:59:46,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:46,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925295476] [2020-10-19 17:59:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 17:59:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-19 17:59:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-19 17:59:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-19 17:59:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-19 17:59:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-19 17:59:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-19 17:59:47,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925295476] [2020-10-19 17:59:47,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099714436] [2020-10-19 17:59:47,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:47,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 17:59:47,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 17:59:47,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:48,020 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_7 Int) (aux_div_v_main_~a~0.offset_BEFORE_CALL_7_110 Int) (v_main_~i~0_BEFORE_CALL_5 Int)) (<= (+ (* 4 aux_div_v_main_~a~0.offset_BEFORE_CALL_7_110) 4) (+ (select |c_#length| v_main_~a~0.base_BEFORE_CALL_7) (* 4 v_main_~i~0_BEFORE_CALL_5)))) is different from true [2020-10-19 17:59:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-19 17:59:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2020-10-19 17:59:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181812123] [2020-10-19 17:59:48,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-19 17:59:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-19 17:59:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=265, Unknown=1, NotChecked=32, Total=342 [2020-10-19 17:59:48,162 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 19 states. [2020-10-19 17:59:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:51,182 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-10-19 17:59:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-19 17:59:51,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-19 17:59:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:51,183 INFO L225 Difference]: With dead ends: 64 [2020-10-19 17:59:51,183 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 17:59:51,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=186, Invalid=808, Unknown=2, NotChecked=60, Total=1056 [2020-10-19 17:59:51,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 17:59:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 17:59:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 17:59:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 17:59:51,185 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-10-19 17:59:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:51,185 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 17:59:51,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-19 17:59:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 17:59:51,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 17:59:51,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 17:59:51,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 05:59:51 BoogieIcfgContainer [2020-10-19 17:59:51,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 17:59:51,394 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 17:59:51,394 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 17:59:51,394 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 17:59:51,395 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:35" (3/4) ... [2020-10-19 17:59:51,398 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 17:59:51,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2020-10-19 17:59:51,405 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 17:59:51,406 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2020-10-19 17:59:51,406 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 17:59:51,406 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2020-10-19 17:59:51,406 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure #Ultimate.meminit [2020-10-19 17:59:51,413 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-10-19 17:59:51,413 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-19 17:59:51,413 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-10-19 17:59:51,414 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 17:59:51,496 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 17:59:51,496 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 17:59:51,501 INFO L168 Benchmark]: Toolchain (without parser) took 16676.04 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 314.0 MB). Free memory was 953.2 MB in the beginning and 840.8 MB in the end (delta: 112.4 MB). Peak memory consumption was 426.5 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:51,502 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:59:51,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -172.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:51,503 INFO L168 Benchmark]: Boogie Preprocessor took 47.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:51,503 INFO L168 Benchmark]: RCFGBuilder took 534.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:51,507 INFO L168 Benchmark]: TraceAbstraction took 15644.65 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 184.5 MB). Free memory was 1.1 GB in the beginning and 850.0 MB in the end (delta: 242.4 MB). Peak memory consumption was 427.0 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:51,508 INFO L168 Benchmark]: Witness Printer took 105.11 ms. Allocated memory is still 1.3 GB. Free memory was 850.0 MB in the beginning and 840.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:51,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 334.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -172.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 47.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 534.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15644.65 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 184.5 MB). Free memory was 1.1 GB in the beginning and 850.0 MB in the end (delta: 242.4 MB). Peak memory consumption was 427.0 MB. Max. memory is 11.5 GB. * Witness Printer took 105.11 ms. Allocated memory is still 1.3 GB. Free memory was 850.0 MB in the beginning and 840.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 48]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 43]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 46]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 66 locations, 17 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.5s, OverallIterations: 17, TraceHistogramMax: 3, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 614 SDtfs, 1578 SDslu, 1147 SDs, 0 SdLazy, 3680 SolverSat, 643 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 647 GetRequests, 394 SyntacticMatches, 8 SemanticMatches, 245 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 219 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 877 NumberOfCodeBlocks, 860 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 853 ConstructedInterpolants, 20 QuantifiedInterpolants, 183340 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1256 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 24 InterpolantComputations, 13 PerfectInterpolantSequences, 188/230 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...