./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4e11665f1fb34385e5a13a8ae204131e2123894d .......................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:51:47,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:51:47,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:51:47,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:51:47,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:51:47,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:51:47,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:51:47,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:51:47,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:51:47,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:51:47,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:51:47,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:51:47,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:51:47,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:51:47,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:51:47,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:51:47,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:51:47,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:51:47,726 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:51:47,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:51:47,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:51:47,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:51:47,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:51:47,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:51:47,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:51:47,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:51:47,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:51:47,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:51:47,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:51:47,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:51:47,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:51:47,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:51:47,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:51:47,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:51:47,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:51:47,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:51:47,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:51:47,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:51:47,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:51:47,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:51:47,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:51:47,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:51:47,778 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:51:47,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:51:47,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:51:47,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:51:47,781 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:51:47,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:51:47,782 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:51:47,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:51:47,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:51:47,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:51:47,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:51:47,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:51:47,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:51:47,785 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:51:47,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:51:47,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:51:47,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:51:47,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:51:47,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:51:47,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:51:47,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:51:47,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:51:47,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:51:47,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:51:47,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:51:47,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:51:47,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:51:47,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:51:47,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:51:47,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e11665f1fb34385e5a13a8ae204131e2123894d [2020-11-30 00:51:48,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:51:48,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:51:48,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:51:48,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:51:48,126 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:51:48,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/../../sv-benchmarks/c/array-fpi/nsqm-iff.c [2020-11-30 00:51:48,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/data/9fc1b9dd6/abb06372069d41a29bcf2a1e37f20a75/FLAG47a3e4358 [2020-11-30 00:51:48,684 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:51:48,684 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/sv-benchmarks/c/array-fpi/nsqm-iff.c [2020-11-30 00:51:48,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/data/9fc1b9dd6/abb06372069d41a29bcf2a1e37f20a75/FLAG47a3e4358 [2020-11-30 00:51:49,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/data/9fc1b9dd6/abb06372069d41a29bcf2a1e37f20a75 [2020-11-30 00:51:49,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:51:49,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:51:49,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:51:49,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:51:49,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:51:49,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412733f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49, skipping insertion in model container [2020-11-30 00:51:49,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:51:49,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:51:49,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:51:49,318 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:51:49,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:51:49,350 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:51:49,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49 WrapperNode [2020-11-30 00:51:49,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:51:49,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:51:49,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:51:49,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:51:49,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:51:49,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:51:49,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:51:49,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:51:49,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... [2020-11-30 00:51:49,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:51:49,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:51:49,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:51:49,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:51:49,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/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 [2020-11-30 00:51:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:51:49,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:51:49,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:51:49,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 00:51:49,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:51:49,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:51:49,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 00:51:49,990 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:51:49,991 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-30 00:51:49,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:51:49 BoogieIcfgContainer [2020-11-30 00:51:49,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:51:49,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:51:49,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:51:50,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:51:50,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:51:49" (1/3) ... [2020-11-30 00:51:50,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5c5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:51:50, skipping insertion in model container [2020-11-30 00:51:50,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:51:49" (2/3) ... [2020-11-30 00:51:50,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5c5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:51:50, skipping insertion in model container [2020-11-30 00:51:50,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:51:49" (3/3) ... [2020-11-30 00:51:50,004 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2020-11-30 00:51:50,017 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:51:50,021 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:51:50,032 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:51:50,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:51:50,068 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:51:50,068 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:51:50,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:51:50,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:51:50,068 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:51:50,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:51:50,069 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:51:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 00:51:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:51:50,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:51:50,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:51:50,090 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:51:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:51:50,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-11-30 00:51:50,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:51:50,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977220480] [2020-11-30 00:51:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:51:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:51:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:51:50,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977220480] [2020-11-30 00:51:50,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:51:50,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:51:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491423400] [2020-11-30 00:51:50,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 00:51:50,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:51:50,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 00:51:50,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:51:50,302 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-30 00:51:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:51:50,318 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-11-30 00:51:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 00:51:50,319 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-30 00:51:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:51:50,328 INFO L225 Difference]: With dead ends: 43 [2020-11-30 00:51:50,328 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 00:51:50,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:51:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 00:51:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 00:51:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 00:51:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-11-30 00:51:50,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-11-30 00:51:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:51:50,376 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-11-30 00:51:50,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 00:51:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-11-30 00:51:50,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:51:50,377 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:51:50,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:51:50,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:51:50,378 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:51:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:51:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-11-30 00:51:50,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:51:50,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431480723] [2020-11-30 00:51:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:51:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:51:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:51:50,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431480723] [2020-11-30 00:51:50,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:51:50,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:51:50,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270463620] [2020-11-30 00:51:50,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:51:50,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:51:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:51:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:51:50,495 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-11-30 00:51:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:51:50,580 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-11-30 00:51:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:51:50,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-30 00:51:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:51:50,583 INFO L225 Difference]: With dead ends: 45 [2020-11-30 00:51:50,583 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 00:51:50,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:51:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 00:51:50,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-30 00:51:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 00:51:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 00:51:50,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-11-30 00:51:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:51:50,589 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 00:51:50,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:51:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 00:51:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 00:51:50,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:51:50,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:51:50,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:51:50,591 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:51:50,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:51:50,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-11-30 00:51:50,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:51:50,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984689637] [2020-11-30 00:51:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:51:50,612 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:51:50,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854255429] [2020-11-30 00:51:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/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 [2020-11-30 00:51:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:51:50,675 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:51:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:51:50,692 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:51:50,719 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:51:50,719 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:51:50,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 00:51:50,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:51:50 BoogieIcfgContainer [2020-11-30 00:51:50,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:51:50,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:51:50,977 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:51:50,977 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:51:50,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:51:49" (3/4) ... [2020-11-30 00:51:50,979 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:51:51,022 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_55756d67-e866-4bd6-9cd4-ef0a8b1009ab/bin/uautomizer/witness.graphml [2020-11-30 00:51:51,022 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:51:51,024 INFO L168 Benchmark]: Toolchain (without parser) took 1966.51 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 51.4 MB in the beginning and 49.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:51,025 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory was 38.3 MB in the beginning and 38.2 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:51:51,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.92 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 51.1 MB in the beginning and 74.5 MB in the end (delta: -23.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:51,026 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.41 ms. Allocated memory is still 96.5 MB. Free memory was 74.5 MB in the beginning and 73.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:51,027 INFO L168 Benchmark]: Boogie Preprocessor took 58.71 ms. Allocated memory is still 96.5 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 974.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:51:51,028 INFO L168 Benchmark]: RCFGBuilder took 519.75 ms. Allocated memory is still 96.5 MB. Free memory was 72.0 MB in the beginning and 56.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:51,028 INFO L168 Benchmark]: TraceAbstraction took 983.14 ms. Allocated memory is still 96.5 MB. Free memory was 56.2 MB in the beginning and 52.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:51,029 INFO L168 Benchmark]: Witness Printer took 44.81 ms. Allocated memory is still 96.5 MB. Free memory was 52.4 MB in the beginning and 49.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:51:51,033 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory was 38.3 MB in the beginning and 38.2 MB in the end (delta: 34.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 292.92 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 51.1 MB in the beginning and 74.5 MB in the end (delta: -23.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.41 ms. Allocated memory is still 96.5 MB. Free memory was 74.5 MB in the beginning and 73.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.71 ms. Allocated memory is still 96.5 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 974.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 519.75 ms. Allocated memory is still 96.5 MB. Free memory was 72.0 MB in the beginning and 56.7 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 983.14 ms. Allocated memory is still 96.5 MB. Free memory was 56.2 MB in the beginning and 52.4 MB in the end (delta: 3.8 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Witness Printer took 44.81 ms. Allocated memory is still 96.5 MB. Free memory was 52.4 MB in the beginning and 49.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i