./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-ext3/realloc1.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/memsafety-ext3/realloc1.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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:24:11,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:24:11,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:24:11,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:24:11,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:24:11,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:24:11,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:24:11,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:24:11,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:24:11,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:24:11,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:24:11,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:24:11,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:24:11,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:24:11,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:24:11,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:24:11,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:24:11,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:24:11,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:24:11,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:24:11,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:24:11,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:24:11,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:24:11,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:24:11,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:24:11,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:24:11,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:24:11,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:24:11,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:24:11,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:24:11,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:24:11,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:24:11,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:24:11,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:24:11,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:24:11,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:24:11,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:24:11,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:24:11,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:24:11,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:24:11,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:24:11,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:24:11,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:24:11,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:24:11,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:24:11,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:24:11,935 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:24:11,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:24:11,936 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:24:11,936 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:24:11,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:24:11,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:24:11,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:24:11,937 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:24:11,937 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:24:11,938 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:24:11,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:24:11,938 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:24:11,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:24:11,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:24:11,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:24:11,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:24:11,940 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:24:11,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:24:11,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:24:11,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:24:11,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:24:11,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:24:11,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:24:11,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:24:11,942 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 -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2020-10-19 18:24:12,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:24:12,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:24:12,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:24:12,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:24:12,306 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:24:12,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-10-19 18:24:12,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff412f0f6/fd40f6db56b14f439503e08caad6600d/FLAG7cd1172b8 [2020-10-19 18:24:12,840 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:24:12,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-10-19 18:24:12,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff412f0f6/fd40f6db56b14f439503e08caad6600d/FLAG7cd1172b8 [2020-10-19 18:24:13,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff412f0f6/fd40f6db56b14f439503e08caad6600d [2020-10-19 18:24:13,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:24:13,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:24:13,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:24:13,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:24:13,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:24:13,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c71234a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13, skipping insertion in model container [2020-10-19 18:24:13,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:24:13,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:24:13,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:24:13,483 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:24:13,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:24:13,519 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:24:13,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13 WrapperNode [2020-10-19 18:24:13,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:24:13,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:24:13,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:24:13,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:24:13,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (1/1) ... [2020-10-19 18:24:13,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:24:13,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:24:13,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:24:13,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:24:13,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (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 18:24:13,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:24:13,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:24:13,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:24:13,708 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2020-10-19 18:24:13,709 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:24:13,709 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:24:13,710 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:24:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-19 18:24:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:24:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:24:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2020-10-19 18:24:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:24:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:24:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:24:13,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:24:13,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:24:13,985 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:24:13,986 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 18:24:13,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:13 BoogieIcfgContainer [2020-10-19 18:24:13,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:24:13,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:24:13,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:24:13,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:24:13,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:24:13" (1/3) ... [2020-10-19 18:24:13,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c65c116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:24:13, skipping insertion in model container [2020-10-19 18:24:14,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:24:13" (2/3) ... [2020-10-19 18:24:14,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c65c116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:24:14, skipping insertion in model container [2020-10-19 18:24:14,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:13" (3/3) ... [2020-10-19 18:24:14,006 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2020-10-19 18:24:14,037 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:24:14,056 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-10-19 18:24:14,080 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-10-19 18:24:14,099 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:24:14,100 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:24:14,100 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:24:14,100 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:24:14,100 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:24:14,100 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:24:14,100 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:24:14,101 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:24:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-19 18:24:14,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:24:14,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:14,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:14,125 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash 604141221, now seen corresponding path program 1 times [2020-10-19 18:24:14,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:14,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604426646] [2020-10-19 18:24:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,337 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 18:24:14,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604426646] [2020-10-19 18:24:14,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:14,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:24:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445503571] [2020-10-19 18:24:14,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:14,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:14,366 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-19 18:24:14,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:14,486 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-19 18:24:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:14,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:24:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:14,499 INFO L225 Difference]: With dead ends: 39 [2020-10-19 18:24:14,499 INFO L226 Difference]: Without dead ends: 36 [2020-10-19 18:24:14,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-19 18:24:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-19 18:24:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-19 18:24:14,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-19 18:24:14,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2020-10-19 18:24:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:14,544 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-19 18:24:14,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-19 18:24:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:24:14,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:14,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:14,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:24:14,546 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:14,546 INFO L82 PathProgramCache]: Analyzing trace with hash 604141275, now seen corresponding path program 1 times [2020-10-19 18:24:14,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:14,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081873310] [2020-10-19 18:24:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,605 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 18:24:14,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081873310] [2020-10-19 18:24:14,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:14,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:14,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211333325] [2020-10-19 18:24:14,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:14,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:14,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:14,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:14,609 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-10-19 18:24:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:14,683 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-19 18:24:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:14,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:24:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:14,685 INFO L225 Difference]: With dead ends: 32 [2020-10-19 18:24:14,686 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 18:24:14,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 18:24:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-19 18:24:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 18:24:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-19 18:24:14,692 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 8 [2020-10-19 18:24:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:14,693 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-19 18:24:14,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-19 18:24:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-19 18:24:14,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:14,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:14,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:24:14,694 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:14,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash 604141276, now seen corresponding path program 1 times [2020-10-19 18:24:14,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:14,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465045366] [2020-10-19 18:24:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,775 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 18:24:14,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465045366] [2020-10-19 18:24:14,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:14,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:14,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852710995] [2020-10-19 18:24:14,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:14,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:14,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:14,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:14,780 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-19 18:24:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:14,890 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-19 18:24:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:14,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-19 18:24:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:14,893 INFO L225 Difference]: With dead ends: 32 [2020-10-19 18:24:14,893 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 18:24:14,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 18:24:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-19 18:24:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:24:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-19 18:24:14,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 8 [2020-10-19 18:24:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:14,902 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-19 18:24:14,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-19 18:24:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:24:14,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:14,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:14,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:24:14,908 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -572402136, now seen corresponding path program 1 times [2020-10-19 18:24:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:14,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773698816] [2020-10-19 18:24:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 18:24:14,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773698816] [2020-10-19 18:24:14,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:24:14,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:24:14,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796977511] [2020-10-19 18:24:15,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:24:15,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:15,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:24:15,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:15,006 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2020-10-19 18:24:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:15,073 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-10-19 18:24:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:24:15,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-19 18:24:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:15,075 INFO L225 Difference]: With dead ends: 32 [2020-10-19 18:24:15,076 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 18:24:15,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:24:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 18:24:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-19 18:24:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 18:24:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-19 18:24:15,085 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 12 [2020-10-19 18:24:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:15,086 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-19 18:24:15,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:24:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-19 18:24:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 18:24:15,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:15,090 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:15,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:24:15,091 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:15,092 INFO L82 PathProgramCache]: Analyzing trace with hash -572402081, now seen corresponding path program 1 times [2020-10-19 18:24:15,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:15,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956171383] [2020-10-19 18:24:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,260 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 18:24:15,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956171383] [2020-10-19 18:24:15,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66157254] [2020-10-19 18:24:15,261 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 18:24:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 18:24:15,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:15,396 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:24:15,397 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:24:15,408 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:24:15,409 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:24:15,409 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 18:24:15,435 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 18:24:15,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:15,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-10-19 18:24:15,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312427753] [2020-10-19 18:24:15,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:24:15,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:24:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:24:15,438 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-10-19 18:24:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:15,543 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-19 18:24:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:24:15,544 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-19 18:24:15,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:15,545 INFO L225 Difference]: With dead ends: 37 [2020-10-19 18:24:15,546 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 18:24:15,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:24:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 18:24:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-19 18:24:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 18:24:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-19 18:24:15,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 12 [2020-10-19 18:24:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:15,553 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-19 18:24:15,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:24:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-19 18:24:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:24:15,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:15,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:15,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:15,769 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1487393457, now seen corresponding path program 1 times [2020-10-19 18:24:15,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:15,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581429362] [2020-10-19 18:24:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:15,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581429362] [2020-10-19 18:24:15,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506407832] [2020-10-19 18:24:15,848 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 18:24:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:24:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:15,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:15,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-19 18:24:15,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057756645] [2020-10-19 18:24:15,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:24:15,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:15,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:24:15,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:24:15,947 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2020-10-19 18:24:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:16,025 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-19 18:24:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:24:16,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-19 18:24:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:16,027 INFO L225 Difference]: With dead ends: 41 [2020-10-19 18:24:16,028 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 18:24:16,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:24:16,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 18:24:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-19 18:24:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 18:24:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-19 18:24:16,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2020-10-19 18:24:16,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:16,035 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-19 18:24:16,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:24:16,035 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-19 18:24:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 18:24:16,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:16,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:16,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:16,250 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:16,251 INFO L82 PathProgramCache]: Analyzing trace with hash 304700076, now seen corresponding path program 2 times [2020-10-19 18:24:16,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:16,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753089614] [2020-10-19 18:24:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753089614] [2020-10-19 18:24:16,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793531745] [2020-10-19 18:24:16,359 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 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 18:24:16,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 18:24:16,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:16,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:24:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-19 18:24:16,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 18:24:16,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2020-10-19 18:24:16,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230839] [2020-10-19 18:24:16,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:24:16,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:24:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:24:16,426 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 3 states. [2020-10-19 18:24:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:16,444 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-19 18:24:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:24:16,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-19 18:24:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:16,446 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:24:16,446 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 18:24:16,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:24:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 18:24:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-19 18:24:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-19 18:24:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-19 18:24:16,452 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 25 [2020-10-19 18:24:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:16,453 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-19 18:24:16,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:24:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-19 18:24:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-19 18:24:16,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:16,455 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:16,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:16,668 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:16,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:16,668 INFO L82 PathProgramCache]: Analyzing trace with hash 758998927, now seen corresponding path program 1 times [2020-10-19 18:24:16,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:16,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325159238] [2020-10-19 18:24:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325159238] [2020-10-19 18:24:16,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785344056] [2020-10-19 18:24:16,745 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 18:24:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:16,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:24:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:16,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:16,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-19 18:24:16,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170339084] [2020-10-19 18:24:16,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 18:24:16,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:16,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 18:24:16,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:24:16,830 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2020-10-19 18:24:16,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:16,899 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-19 18:24:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:24:16,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-19 18:24:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:16,901 INFO L225 Difference]: With dead ends: 44 [2020-10-19 18:24:16,901 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 18:24:16,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:24:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 18:24:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-19 18:24:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 18:24:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-19 18:24:16,906 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2020-10-19 18:24:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:16,907 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-19 18:24:16,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 18:24:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-19 18:24:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 18:24:16,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:16,909 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:17,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:17,117 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:17,118 INFO L82 PathProgramCache]: Analyzing trace with hash 660364076, now seen corresponding path program 2 times [2020-10-19 18:24:17,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:17,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449979359] [2020-10-19 18:24:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449979359] [2020-10-19 18:24:17,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003980331] [2020-10-19 18:24:17,218 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 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 18:24:17,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 18:24:17,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:24:17,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:17,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-10-19 18:24:17,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486463688] [2020-10-19 18:24:17,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 18:24:17,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:17,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 18:24:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:24:17,299 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2020-10-19 18:24:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:17,360 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-19 18:24:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:24:17,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-19 18:24:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:17,361 INFO L225 Difference]: With dead ends: 48 [2020-10-19 18:24:17,361 INFO L226 Difference]: Without dead ends: 48 [2020-10-19 18:24:17,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:24:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-19 18:24:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-19 18:24:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 18:24:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-19 18:24:17,367 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2020-10-19 18:24:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:17,367 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-19 18:24:17,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 18:24:17,368 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-19 18:24:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-19 18:24:17,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:17,369 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:17,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:17,581 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:17,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1265514569, now seen corresponding path program 3 times [2020-10-19 18:24:17,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:17,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917861364] [2020-10-19 18:24:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917861364] [2020-10-19 18:24:17,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39500659] [2020-10-19 18:24:17,688 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 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 18:24:17,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-19 18:24:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:24:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:17,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:17,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-19 18:24:17,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236779563] [2020-10-19 18:24:17,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 18:24:17,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 18:24:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:24:17,787 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 11 states. [2020-10-19 18:24:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:17,896 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-19 18:24:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 18:24:17,897 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-19 18:24:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:17,898 INFO L225 Difference]: With dead ends: 52 [2020-10-19 18:24:17,898 INFO L226 Difference]: Without dead ends: 52 [2020-10-19 18:24:17,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:24:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-19 18:24:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-19 18:24:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-19 18:24:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-19 18:24:17,903 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 35 [2020-10-19 18:24:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:17,904 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-19 18:24:17,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 18:24:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-19 18:24:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-19 18:24:17,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:17,905 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:18,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:18,116 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:18,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:18,117 INFO L82 PathProgramCache]: Analyzing trace with hash 719470310, now seen corresponding path program 4 times [2020-10-19 18:24:18,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:18,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296524937] [2020-10-19 18:24:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296524937] [2020-10-19 18:24:18,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269784863] [2020-10-19 18:24:18,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 18:24:18,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 18:24:18,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:18,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:24:18,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:18,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-10-19 18:24:18,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424677697] [2020-10-19 18:24:18,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 18:24:18,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:18,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 18:24:18,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:24:18,361 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 12 states. [2020-10-19 18:24:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:18,448 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-19 18:24:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 18:24:18,449 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-19 18:24:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:18,449 INFO L225 Difference]: With dead ends: 56 [2020-10-19 18:24:18,449 INFO L226 Difference]: Without dead ends: 56 [2020-10-19 18:24:18,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:24:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-19 18:24:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-19 18:24:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-19 18:24:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-19 18:24:18,454 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 39 [2020-10-19 18:24:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:18,454 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-19 18:24:18,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 18:24:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-19 18:24:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-19 18:24:18,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:18,455 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:18,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:18,656 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1920487677, now seen corresponding path program 5 times [2020-10-19 18:24:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:18,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265897763] [2020-10-19 18:24:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265897763] [2020-10-19 18:24:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265916865] [2020-10-19 18:24:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:18,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-19 18:24:18,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:18,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 18:24:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:18,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:18,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-19 18:24:18,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009970160] [2020-10-19 18:24:18,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 18:24:18,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 18:24:18,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:24:18,856 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 13 states. [2020-10-19 18:24:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:18,945 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-19 18:24:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 18:24:18,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-19 18:24:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:18,947 INFO L225 Difference]: With dead ends: 60 [2020-10-19 18:24:18,947 INFO L226 Difference]: Without dead ends: 60 [2020-10-19 18:24:18,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-19 18:24:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-19 18:24:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-19 18:24:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-19 18:24:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-19 18:24:18,953 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 43 [2020-10-19 18:24:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:18,954 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-19 18:24:18,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 18:24:18,954 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-19 18:24:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-19 18:24:18,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:18,955 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:19,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 18:24:19,165 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:19,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1099810976, now seen corresponding path program 6 times [2020-10-19 18:24:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:19,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928874538] [2020-10-19 18:24:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:19,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:24:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:24:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:19,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928874538] [2020-10-19 18:24:19,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895175610] [2020-10-19 18:24:19,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:19,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-19 18:24:19,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 18:24:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 18:24:19,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:24:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:24:19,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 18:24:19,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-10-19 18:24:19,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309773681] [2020-10-19 18:24:19,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-19 18:24:19,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:24:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 18:24:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:24:19,430 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 14 states. [2020-10-19 18:24:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:24:19,519 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-19 18:24:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 18:24:19,519 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-19 18:24:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:24:19,520 INFO L225 Difference]: With dead ends: 61 [2020-10-19 18:24:19,520 INFO L226 Difference]: Without dead ends: 61 [2020-10-19 18:24:19,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-19 18:24:19,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-19 18:24:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-19 18:24:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-19 18:24:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-19 18:24:19,527 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2020-10-19 18:24:19,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:24:19,527 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-19 18:24:19,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-19 18:24:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-19 18:24:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-19 18:24:19,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:24:19,529 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:24:19,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 18:24:19,730 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION]=== [2020-10-19 18:24:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:24:19,731 INFO L82 PathProgramCache]: Analyzing trace with hash -343684163, now seen corresponding path program 7 times [2020-10-19 18:24:19,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:24:19,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912262078] [2020-10-19 18:24:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:24:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:24:19,759 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:24:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:24:19,808 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:24:19,842 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:24:19,842 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:24:19,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:24:19,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:24:19 BoogieIcfgContainer [2020-10-19 18:24:19,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:24:19,920 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:24:19,920 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:24:19,920 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:24:19,921 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:24:13" (3/4) ... [2020-10-19 18:24:19,924 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:24:20,002 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:24:20,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:24:20,004 INFO L168 Benchmark]: Toolchain (without parser) took 6786.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.9 MB). Free memory was 960.0 MB in the beginning and 1.0 GB in the end (delta: -54.9 MB). Peak memory consumption was 149.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,005 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:24:20,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.22 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,006 INFO L168 Benchmark]: Boogie Preprocessor took 118.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -175.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,007 INFO L168 Benchmark]: RCFGBuilder took 349.10 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,007 INFO L168 Benchmark]: TraceAbstraction took 5929.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 82.5 MB). Peak memory consumption was 151.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,008 INFO L168 Benchmark]: Witness Printer took 82.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2020-10-19 18:24:20,011 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 295.22 ms. Allocated memory is still 1.0 GB. Free memory was 960.0 MB in the beginning and 949.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 118.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 949.2 MB in the beginning and 1.1 GB in the end (delta: -175.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 349.10 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5929.82 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 68.7 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 82.5 MB). Peak memory consumption was 151.2 MB. Max. memory is 11.5 GB. * Witness Printer took 82.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; VAL [i=0, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-1, i=0, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=1, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-2, i=1, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=2, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-3, i=2, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=3, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-4, i=3, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=4, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-5, i=4, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=5, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-6, i=5, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=6, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-7, i=6, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=7, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-8, i=7, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=8, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=-9, i=8, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=9, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=10, i=9, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] i++ VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L10] COND FALSE !(i < 10) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) VAL [i=10, malloc(10 * sizeof(int))={11:0}, p={11:0}] [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.7s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 259 SDtfs, 211 SDslu, 716 SDs, 0 SdLazy, 726 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 37 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 647 NumberOfCodeBlocks, 631 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 51270 SizeOfPredicates, 10 NumberOfNonLiveVariables, 905 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 29/1097 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 incorrect! Received shutdown request...