./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.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_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/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 b8372a31944d45846edae8fd3de2e59236f8e911 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:19:42,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:19:42,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:19:42,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:19:42,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:19:42,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:19:42,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:19:42,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:19:42,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:19:42,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:19:42,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:19:42,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:19:42,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:19:42,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:19:42,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:19:42,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:19:42,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:19:42,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:19:42,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:19:42,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:19:42,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:19:42,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:19:42,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:19:42,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:19:42,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:19:42,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:19:42,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:19:42,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:19:42,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:19:42,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:19:42,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:19:42,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:19:42,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:19:42,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:19:42,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:19:42,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:19:42,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:19:42,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:19:42,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:19:42,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:19:42,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:19:42,901 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 00:19:42,958 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:19:42,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:19:42,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:19:42,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:19:42,962 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:19:42,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:19:42,963 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:19:42,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:19:42,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:19:42,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:19:42,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:19:42,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:19:42,966 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:19:42,966 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:19:42,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:19:42,967 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:19:42,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:19:42,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:19:42,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:19:42,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:19:42,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:19:42,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:19:42,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:19:42,970 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:19:42,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:19:42,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:19:42,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:19:42,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:19:42,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:19:42,982 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_f62169ae-369a-4dd8-9cb1-092b1b3eb773/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8372a31944d45846edae8fd3de2e59236f8e911 [2020-11-30 00:19:43,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:19:43,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:19:43,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:19:43,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:19:43,355 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:19:43,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/../../sv-benchmarks/c/array-fpi/eqn5f.c [2020-11-30 00:19:43,443 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/data/c52d0dffb/f99a2677434945d89cf0afaacbcb90b9/FLAG1c1f0c2c4 [2020-11-30 00:19:44,003 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:19:44,017 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/sv-benchmarks/c/array-fpi/eqn5f.c [2020-11-30 00:19:44,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/data/c52d0dffb/f99a2677434945d89cf0afaacbcb90b9/FLAG1c1f0c2c4 [2020-11-30 00:19:44,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/data/c52d0dffb/f99a2677434945d89cf0afaacbcb90b9 [2020-11-30 00:19:44,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:19:44,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:19:44,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:19:44,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:19:44,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:19:44,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c27965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44, skipping insertion in model container [2020-11-30 00:19:44,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:19:44,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:19:44,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:19:44,651 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:19:44,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:19:44,709 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:19:44,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44 WrapperNode [2020-11-30 00:19:44,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:19:44,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:19:44,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:19:44,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:19:44,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:19:44,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:19:44,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:19:44,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:19:44,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... [2020-11-30 00:19:44,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:19:44,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:19:44,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:19:44,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:19:44,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/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 00:19:44,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:19:44,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:19:44,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:19:44,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 00:19:44,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:19:44,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:19:44,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 00:19:45,500 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:19:45,501 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-30 00:19:45,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:19:45 BoogieIcfgContainer [2020-11-30 00:19:45,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:19:45,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:19:45,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:19:45,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:19:45,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:19:44" (1/3) ... [2020-11-30 00:19:45,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8f521c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:19:45, skipping insertion in model container [2020-11-30 00:19:45,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:19:44" (2/3) ... [2020-11-30 00:19:45,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8f521c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:19:45, skipping insertion in model container [2020-11-30 00:19:45,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:19:45" (3/3) ... [2020-11-30 00:19:45,516 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-11-30 00:19:45,530 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:19:45,535 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 00:19:45,549 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 00:19:45,593 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:19:45,593 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:19:45,593 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:19:45,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:19:45,594 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:19:45,594 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:19:45,594 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:19:45,594 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:19:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-30 00:19:45,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:19:45,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:19:45,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:19:45,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:19:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:19:45,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2020-11-30 00:19:45,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:19:45,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327071685] [2020-11-30 00:19:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:19:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:19:45,875 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 00:19:45,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327071685] [2020-11-30 00:19:45,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:19:45,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:19:45,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286365264] [2020-11-30 00:19:45,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 00:19:45,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:19:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 00:19:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 00:19:45,909 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-11-30 00:19:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:19:45,930 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-11-30 00:19:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 00:19:45,933 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-30 00:19:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:19:45,944 INFO L225 Difference]: With dead ends: 39 [2020-11-30 00:19:45,945 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 00:19:45,950 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 00:19:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 00:19:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 00:19:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 00:19:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-30 00:19:46,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-11-30 00:19:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:19:46,000 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-30 00:19:46,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 00:19:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-30 00:19:46,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:19:46,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:19:46,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:19:46,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:19:46,005 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:19:46,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:19:46,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2020-11-30 00:19:46,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:19:46,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573009152] [2020-11-30 00:19:46,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:19:46,063 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:19:46,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624076463] [2020-11-30 00:19:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/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 00:19:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:19:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:19:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:19:46,302 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-11-30 00:19:46,303 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2020-11-30 00:19:46,303 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:19:46,313 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:19:46,320 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-30 00:19:46,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2020-11-30 00:19:46,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:46,452 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 00:19:46,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573009152] [2020-11-30 00:19:46,453 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 00:19:46,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624076463] [2020-11-30 00:19:46,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:19:46,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:19:46,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279337460] [2020-11-30 00:19:46,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:19:46,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:19:46,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:19:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:19:46,458 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-11-30 00:19:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:19:46,623 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-30 00:19:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:19:46,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-30 00:19:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:19:46,627 INFO L225 Difference]: With dead ends: 34 [2020-11-30 00:19:46,627 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 00:19:46,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:19:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 00:19:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-11-30 00:19:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 00:19:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 00:19:46,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-11-30 00:19:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:19:46,641 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 00:19:46,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:19:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 00:19:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 00:19:46,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:19:46,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:19:46,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 00:19:46,861 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:19:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:19:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2020-11-30 00:19:46,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:19:46,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738014478] [2020-11-30 00:19:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:19:46,886 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:19:46,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639432073] [2020-11-30 00:19:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/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 [2020-11-30 00:19:46,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:19:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:19:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:19:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:19:47,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738014478] [2020-11-30 00:19:47,041 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 00:19:47,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639432073] [2020-11-30 00:19:47,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:19:47,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:19:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839044814] [2020-11-30 00:19:47,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:19:47,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:19:47,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:19:47,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:19:47,044 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-11-30 00:19:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:19:47,232 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-11-30 00:19:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:19:47,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 00:19:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:19:47,234 INFO L225 Difference]: With dead ends: 49 [2020-11-30 00:19:47,234 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 00:19:47,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:19:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 00:19:47,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-11-30 00:19:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 00:19:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-30 00:19:47,242 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-11-30 00:19:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:19:47,242 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-30 00:19:47,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:19:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-30 00:19:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 00:19:47,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:19:47,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:19:47,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:19:47,467 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:19:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:19:47,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2020-11-30 00:19:47,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:19:47,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899088149] [2020-11-30 00:19:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:19:47,497 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:19:47,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129114059] [2020-11-30 00:19:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/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 [2020-11-30 00:19:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:19:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:19:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:19:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:19:47,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899088149] [2020-11-30 00:19:47,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 00:19:47,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129114059] [2020-11-30 00:19:47,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:19:47,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-30 00:19:47,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546034706] [2020-11-30 00:19:47,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:19:47,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:19:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:19:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:19:47,657 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-11-30 00:19:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:19:47,777 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-11-30 00:19:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:19:47,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 00:19:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:19:47,780 INFO L225 Difference]: With dead ends: 44 [2020-11-30 00:19:47,780 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 00:19:47,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:19:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 00:19:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2020-11-30 00:19:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 00:19:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-30 00:19:47,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2020-11-30 00:19:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:19:47,787 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-30 00:19:47,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:19:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-30 00:19:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 00:19:47,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:19:47,791 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:19:48,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:19:48,011 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:19:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:19:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1608719470, now seen corresponding path program 1 times [2020-11-30 00:19:48,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:19:48,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917423147] [2020-11-30 00:19:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:19:48,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:19:48,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532675801] [2020-11-30 00:19:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/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 [2020-11-30 00:19:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:19:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 00:19:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:19:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:19:48,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917423147] [2020-11-30 00:19:48,192 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 00:19:48,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532675801] [2020-11-30 00:19:48,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:19:48,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 00:19:48,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573823878] [2020-11-30 00:19:48,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:19:48,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:19:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:19:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:19:48,194 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-11-30 00:19:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:19:48,306 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-11-30 00:19:48,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:19:48,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-30 00:19:48,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:19:48,312 INFO L225 Difference]: With dead ends: 41 [2020-11-30 00:19:48,312 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 00:19:48,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:19:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 00:19:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-11-30 00:19:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 00:19:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-30 00:19:48,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-11-30 00:19:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:19:48,317 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-30 00:19:48,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:19:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-30 00:19:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 00:19:48,317 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:19:48,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:19:48,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:19:48,521 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:19:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:19:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2020-11-30 00:19:48,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:19:48,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012147079] [2020-11-30 00:19:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:19:48,554 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:19:48,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249586850] [2020-11-30 00:19:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/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 [2020-11-30 00:19:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:19:48,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 00:19:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:19:48,663 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 00:19:48,665 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:19:48,673 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:19:48,682 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-11-30 00:19:48,682 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 00:19:48,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:19:48,694 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 00:19:48,694 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-11-30 00:19:48,786 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-11-30 00:19:48,786 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-11-30 00:19:48,788 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:19:48,842 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-11-30 00:19:48,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:48,845 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 00:19:48,846 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-11-30 00:19:48,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:48,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:48,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:48,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:49,091 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-11-30 00:19:49,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:49,148 INFO L441 ElimStorePlain]: Different costs {12=[v_prenex_3], 20=[|v_#memory_int_13|]} [2020-11-30 00:19:49,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 00:19:49,165 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-11-30 00:19:49,165 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2020-11-30 00:19:49,167 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:19:49,231 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:19:49,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 00:19:49,310 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-11-30 00:19:49,311 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2020-11-30 00:19:49,313 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 00:19:49,414 INFO L625 ElimStorePlain]: treesize reduction 45, result has 72.6 percent of original size [2020-11-30 00:19:49,422 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-11-30 00:19:49,423 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:119 [2020-11-30 00:19:50,641 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-30 00:19:54,273 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 54 [2020-11-30 00:19:54,291 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-30 00:19:54,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:54,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:19:54,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:54,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:54,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 00:19:54,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:19:54,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-30 00:19:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:19:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012147079] [2020-11-30 00:19:54,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 00:19:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249586850] [2020-11-30 00:19:54,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:19:54,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-30 00:19:54,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669641710] [2020-11-30 00:19:54,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:19:54,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:19:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:19:54,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=41, Unknown=1, NotChecked=0, Total=56 [2020-11-30 00:19:54,592 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-11-30 00:19:59,511 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-11-30 00:20:03,878 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-11-30 00:20:08,489 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-11-30 00:20:13,040 WARN L193 SmtUtils]: Spent 4.42 s on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-11-30 00:20:18,053 WARN L193 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-11-30 00:20:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:20:18,360 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-11-30 00:20:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:20:18,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-11-30 00:20:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:20:18,365 INFO L225 Difference]: With dead ends: 44 [2020-11-30 00:20:18,365 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 00:20:18,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=46, Invalid=109, Unknown=1, NotChecked=0, Total=156 [2020-11-30 00:20:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 00:20:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-11-30 00:20:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 00:20:18,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 00:20:18,373 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-11-30 00:20:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:20:18,374 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 00:20:18,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:20:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 00:20:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 00:20:18,375 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:20:18,375 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:20:18,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 00:20:18,576 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:20:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:20:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2020-11-30 00:20:18,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:20:18,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424289695] [2020-11-30 00:20:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:20:18,596 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:20:18,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519174809] [2020-11-30 00:20:18,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/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 [2020-11-30 00:20:18,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:20:18,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:20:18,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:20:18,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:20:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:20:18,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424289695] [2020-11-30 00:20:18,770 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 00:20:18,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519174809] [2020-11-30 00:20:18,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:20:18,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-30 00:20:18,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039523795] [2020-11-30 00:20:18,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:20:18,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:20:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:20:18,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:20:18,773 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-11-30 00:20:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:20:19,044 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-11-30 00:20:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:20:19,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-11-30 00:20:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:20:19,048 INFO L225 Difference]: With dead ends: 61 [2020-11-30 00:20:19,048 INFO L226 Difference]: Without dead ends: 52 [2020-11-30 00:20:19,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:20:19,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-30 00:20:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-11-30 00:20:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 00:20:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-11-30 00:20:19,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2020-11-30 00:20:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:20:19,058 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-11-30 00:20:19,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:20:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-11-30 00:20:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 00:20:19,059 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:20:19,059 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:20:19,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:20:19,285 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:20:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:20:19,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2020-11-30 00:20:19,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:20:19,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83587807] [2020-11-30 00:20:19,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:20:19,302 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:20:19,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878232708] [2020-11-30 00:20:19,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/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 [2020-11-30 00:20:19,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 00:20:19,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:20:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:20:19,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:20:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:20:19,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83587807] [2020-11-30 00:20:19,458 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 00:20:19,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878232708] [2020-11-30 00:20:19,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:20:19,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-30 00:20:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622497913] [2020-11-30 00:20:19,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:20:19,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:20:19,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:20:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:20:19,460 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-11-30 00:20:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:20:19,776 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-30 00:20:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:20:19,780 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-11-30 00:20:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:20:19,780 INFO L225 Difference]: With dead ends: 56 [2020-11-30 00:20:19,781 INFO L226 Difference]: Without dead ends: 49 [2020-11-30 00:20:19,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:20:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-30 00:20:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2020-11-30 00:20:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 00:20:19,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-11-30 00:20:19,789 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2020-11-30 00:20:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:20:19,790 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-11-30 00:20:19,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:20:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-11-30 00:20:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 00:20:19,791 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:20:19,791 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:20:20,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:20:20,005 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 00:20:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:20:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash 858128078, now seen corresponding path program 1 times [2020-11-30 00:20:20,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:20:20,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56644408] [2020-11-30 00:20:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:20:20,041 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 00:20:20,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136028279] [2020-11-30 00:20:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/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 [2020-11-30 00:20:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:20:20,150 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:20:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:20:20,170 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:20:20,202 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:20:20,203 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:20:20,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-30 00:20:20,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:20:20 BoogieIcfgContainer [2020-11-30 00:20:20,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:20:20,461 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:20:20,461 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:20:20,461 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:20:20,462 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:19:45" (3/4) ... [2020-11-30 00:20:20,464 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:20:20,529 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f62169ae-369a-4dd8-9cb1-092b1b3eb773/bin/uautomizer/witness.graphml [2020-11-30 00:20:20,530 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:20:20,531 INFO L168 Benchmark]: Toolchain (without parser) took 36166.25 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 74.0 MB in the beginning and 81.0 MB in the end (delta: -7.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:20:20,531 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 71.3 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:20:20,532 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.20 ms. Allocated memory is still 94.4 MB. Free memory was 73.8 MB in the beginning and 63.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:20:20,532 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 94.4 MB. Free memory was 63.9 MB in the beginning and 62.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:20:20,533 INFO L168 Benchmark]: Boogie Preprocessor took 33.48 ms. Allocated memory is still 94.4 MB. Free memory was 62.4 MB in the beginning and 61.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:20:20,533 INFO L168 Benchmark]: RCFGBuilder took 710.24 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 72.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:20:20,534 INFO L168 Benchmark]: TraceAbstraction took 34952.82 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 71.7 MB in the beginning and 84.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:20:20,535 INFO L168 Benchmark]: Witness Printer took 69.06 ms. Allocated memory is still 121.6 MB. Free memory was 84.1 MB in the beginning and 81.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:20:20,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 71.3 MB. Free memory is still 44.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 342.20 ms. Allocated memory is still 94.4 MB. Free memory was 73.8 MB in the beginning and 63.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.62 ms. Allocated memory is still 94.4 MB. Free memory was 63.9 MB in the beginning and 62.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.48 ms. Allocated memory is still 94.4 MB. Free memory was 62.4 MB in the beginning and 61.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 710.24 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 72.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34952.82 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 71.7 MB in the beginning and 84.1 MB in the end (delta: -12.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * Witness Printer took 69.06 ms. Allocated memory is still 121.6 MB. Free memory was 84.1 MB in the beginning and 81.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [N=2] [L33] COND TRUE i