./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.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_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 1cc9cf79891afa42e51c5a84218adbd4a63e1151 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-29 23:12:46,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:12:46,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:12:46,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:12:46,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:12:46,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:12:46,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:12:46,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:12:46,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:12:46,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:12:46,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:12:46,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:12:46,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:12:46,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:12:46,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:12:46,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:12:46,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:12:46,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:12:46,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:12:46,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:12:46,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:12:46,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:12:46,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:12:46,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:12:46,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:12:46,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:12:46,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:12:46,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:12:46,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:12:46,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:12:46,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:12:46,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:12:46,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:12:46,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:12:46,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:12:46,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:12:46,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:12:46,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:12:46,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:12:46,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:12:46,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:12:46,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:12:46,940 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:12:46,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:12:46,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:12:46,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:12:46,943 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:12:46,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:12:46,944 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:12:46,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:12:46,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:12:46,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:12:46,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:12:46,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:12:46,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:12:46,947 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:12:46,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:12:46,947 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:12:46,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:12:46,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:12:46,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:12:46,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:12:46,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:12:46,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:12:46,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:12:46,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:12:46,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:12:46,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:12:46,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:12:46,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:12:46,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:12:46,951 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_939c76fa-3a3c-433d-abe6-7013111d1386/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2020-11-29 23:12:47,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:12:47,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:12:47,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:12:47,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:12:47,251 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:12:47,252 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-11-29 23:12:47,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/data/e0e17e731/b0c254a0872a41f7ab0fc45d201f5f5c/FLAGb6350aa2c [2020-11-29 23:12:47,889 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:12:47,890 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-11-29 23:12:47,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/data/e0e17e731/b0c254a0872a41f7ab0fc45d201f5f5c/FLAGb6350aa2c [2020-11-29 23:12:48,283 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/data/e0e17e731/b0c254a0872a41f7ab0fc45d201f5f5c [2020-11-29 23:12:48,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:12:48,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:12:48,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:12:48,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:12:48,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:12:48,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d8994ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48, skipping insertion in model container [2020-11-29 23:12:48,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:12:48,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:12:48,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:12:48,534 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:12:48,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:12:48,564 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:12:48,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48 WrapperNode [2020-11-29 23:12:48,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:12:48,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:12:48,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:12:48,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:12:48,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:12:48,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:12:48,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:12:48,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:12:48,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... [2020-11-29 23:12:48,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:12:48,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:12:48,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:12:48,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:12:48,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:12:48,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:12:48,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:12:48,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:12:48,914 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:12:48,915 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-29 23:12:48,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:12:48 BoogieIcfgContainer [2020-11-29 23:12:48,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:12:48,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:12:48,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:12:48,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:12:48,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:12:48" (1/3) ... [2020-11-29 23:12:48,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:12:48, skipping insertion in model container [2020-11-29 23:12:48,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:12:48" (2/3) ... [2020-11-29 23:12:48,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:12:48, skipping insertion in model container [2020-11-29 23:12:48,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:12:48" (3/3) ... [2020-11-29 23:12:48,949 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2020-11-29 23:12:48,963 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:12:48,966 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 23:12:48,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 23:12:49,016 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:12:49,016 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:12:49,017 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:12:49,017 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:12:49,017 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:12:49,017 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:12:49,017 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:12:49,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:12:49,038 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-29 23:12:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:12:49,046 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:49,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:49,047 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:49,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1235309937, now seen corresponding path program 1 times [2020-11-29 23:12:49,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:49,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119895598] [2020-11-29 23:12:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:12:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:49,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119895598] [2020-11-29 23:12:49,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:12:49,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:12:49,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276594948] [2020-11-29 23:12:49,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:12:49,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:12:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:12:49,211 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-29 23:12:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:49,230 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-29 23:12:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:12:49,232 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-29 23:12:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:49,245 INFO L225 Difference]: With dead ends: 39 [2020-11-29 23:12:49,246 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 23:12:49,249 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 [2020-11-29 23:12:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 23:12:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-29 23:12:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 23:12:49,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-29 23:12:49,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-11-29 23:12:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:49,298 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-29 23:12:49,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:12:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-29 23:12:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:12:49,300 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:49,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:49,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:12:49,301 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-11-29 23:12:49,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:49,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940959531] [2020-11-29 23:12:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:49,335 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:49,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136979406] [2020-11-29 23:12:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:12:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 23:12:49,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:12:49,528 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:12:49,529 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:12:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:49,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940959531] [2020-11-29 23:12:49,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:12:49,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136979406] [2020-11-29 23:12:49,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:12:49,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 23:12:49,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051388005] [2020-11-29 23:12:49,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:12:49,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:49,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:12:49,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:12:49,621 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-11-29 23:12:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:49,874 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-11-29 23:12:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:12:49,876 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 23:12:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:49,877 INFO L225 Difference]: With dead ends: 32 [2020-11-29 23:12:49,877 INFO L226 Difference]: Without dead ends: 30 [2020-11-29 23:12:49,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:12:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-29 23:12:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-11-29 23:12:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 23:12:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-29 23:12:49,886 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-11-29 23:12:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:49,886 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-29 23:12:49,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:12:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-29 23:12:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 23:12:49,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:49,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:50,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 23:12:50,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1507423092, now seen corresponding path program 1 times [2020-11-29 23:12:50,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:50,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70538203] [2020-11-29 23:12:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:50,132 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:50,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052507388] [2020-11-29 23:12:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:12:50,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 23:12:50,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:12:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:50,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70538203] [2020-11-29 23:12:50,237 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:12:50,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052507388] [2020-11-29 23:12:50,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:12:50,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:12:50,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442217082] [2020-11-29 23:12:50,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:12:50,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:50,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:12:50,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:12:50,240 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-11-29 23:12:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:50,266 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-29 23:12:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:12:50,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 23:12:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:50,268 INFO L225 Difference]: With dead ends: 24 [2020-11-29 23:12:50,268 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 23:12:50,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:12:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 23:12:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-29 23:12:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 23:12:50,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-29 23:12:50,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-11-29 23:12:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:50,273 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-29 23:12:50,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:12:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-29 23:12:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 23:12:50,274 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:50,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:50,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:12:50,475 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1188504123, now seen corresponding path program 1 times [2020-11-29 23:12:50,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:50,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149982619] [2020-11-29 23:12:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:50,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:50,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568184308] [2020-11-29 23:12:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:12:50,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 23:12:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:12:50,623 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 23:12:50,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:12:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:50,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149982619] [2020-11-29 23:12:50,727 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:12:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568184308] [2020-11-29 23:12:50,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:12:50,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 23:12:50,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237103908] [2020-11-29 23:12:50,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:12:50,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:50,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:12:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:12:50,730 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-11-29 23:12:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:53,054 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-11-29 23:12:53,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:12:53,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-29 23:12:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:53,056 INFO L225 Difference]: With dead ends: 27 [2020-11-29 23:12:53,056 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 23:12:53,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-29 23:12:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 23:12:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-11-29 23:12:53,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 23:12:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-29 23:12:53,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-11-29 23:12:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:53,061 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-29 23:12:53,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:12:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-29 23:12:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 23:12:53,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:53,063 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:53,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:12:53,263 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:53,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1768635143, now seen corresponding path program 1 times [2020-11-29 23:12:53,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:53,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33234756] [2020-11-29 23:12:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:53,275 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:53,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148763542] [2020-11-29 23:12:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:12:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 23:12:53,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:12:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:53,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33234756] [2020-11-29 23:12:53,417 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:12:53,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148763542] [2020-11-29 23:12:53,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:12:53,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-29 23:12:53,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322078847] [2020-11-29 23:12:53,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 23:12:53,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:53,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 23:12:53,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:12:53,419 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-11-29 23:12:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:53,475 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-29 23:12:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 23:12:53,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-29 23:12:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:53,481 INFO L225 Difference]: With dead ends: 26 [2020-11-29 23:12:53,481 INFO L226 Difference]: Without dead ends: 22 [2020-11-29 23:12:53,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:12:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-29 23:12:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-29 23:12:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 23:12:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-11-29 23:12:53,486 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-11-29 23:12:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:53,487 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-11-29 23:12:53,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 23:12:53,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-11-29 23:12:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 23:12:53,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:53,494 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:53,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:12:53,720 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:53,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:53,720 INFO L82 PathProgramCache]: Analyzing trace with hash 71944364, now seen corresponding path program 2 times [2020-11-29 23:12:53,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:53,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968282090] [2020-11-29 23:12:53,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:53,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:53,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027725065] [2020-11-29 23:12:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:53,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 23:12:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:12:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:12:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:12:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:53,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968282090] [2020-11-29 23:12:53,856 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:12:53,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027725065] [2020-11-29 23:12:53,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:12:53,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 23:12:53,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161446979] [2020-11-29 23:12:53,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 23:12:53,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:53,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:12:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:12:53,858 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-11-29 23:12:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:53,925 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-29 23:12:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 23:12:53,926 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-29 23:12:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:53,927 INFO L225 Difference]: With dead ends: 31 [2020-11-29 23:12:53,927 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 23:12:53,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:12:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 23:12:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-29 23:12:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 23:12:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-29 23:12:53,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-11-29 23:12:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:53,934 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-29 23:12:53,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 23:12:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-29 23:12:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 23:12:53,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:53,935 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:54,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 23:12:54,136 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash 800201945, now seen corresponding path program 3 times [2020-11-29 23:12:54,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:54,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691047012] [2020-11-29 23:12:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:54,148 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:54,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253880679] [2020-11-29 23:12:54,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:54,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 23:12:54,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:12:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 23:12:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:12:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:54,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691047012] [2020-11-29 23:12:54,286 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:12:54,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253880679] [2020-11-29 23:12:54,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:12:54,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 23:12:54,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861724393] [2020-11-29 23:12:54,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 23:12:54,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:54,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 23:12:54,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 23:12:54,288 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-11-29 23:12:54,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:54,412 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-29 23:12:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:12:54,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-29 23:12:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:54,413 INFO L225 Difference]: With dead ends: 36 [2020-11-29 23:12:54,413 INFO L226 Difference]: Without dead ends: 32 [2020-11-29 23:12:54,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-29 23:12:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-29 23:12:54,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-29 23:12:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 23:12:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-29 23:12:54,419 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-11-29 23:12:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:54,419 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-29 23:12:54,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 23:12:54,419 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-29 23:12:54,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 23:12:54,420 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:54,420 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:54,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:12:54,621 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1993843508, now seen corresponding path program 4 times [2020-11-29 23:12:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:54,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984860017] [2020-11-29 23:12:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:54,633 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:54,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427474348] [2020-11-29 23:12:54,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:54,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 23:12:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 23:12:54,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 23:12:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:12:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:12:54,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984860017] [2020-11-29 23:12:54,835 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 23:12:54,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427474348] [2020-11-29 23:12:54,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 23:12:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 23:12:54,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755465993] [2020-11-29 23:12:54,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 23:12:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:12:54,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:12:54,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:12:54,837 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-11-29 23:12:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:12:54,924 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-11-29 23:12:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 23:12:54,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-29 23:12:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:12:54,926 INFO L225 Difference]: With dead ends: 41 [2020-11-29 23:12:54,927 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 23:12:54,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-11-29 23:12:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 23:12:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-29 23:12:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 23:12:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-11-29 23:12:54,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-11-29 23:12:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:12:54,941 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-11-29 23:12:54,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 23:12:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-11-29 23:12:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-29 23:12:54,944 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:12:54,944 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:12:55,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 23:12:55,160 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:12:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:12:55,160 INFO L82 PathProgramCache]: Analyzing trace with hash -915727175, now seen corresponding path program 5 times [2020-11-29 23:12:55,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:12:55,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187507231] [2020-11-29 23:12:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:12:55,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 23:12:55,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905076637] [2020-11-29 23:12:55,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/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 [2020-11-29 23:12:55,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 23:12:55,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 23:12:55,304 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:12:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:12:55,346 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:12:55,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:12:55,402 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:12:55,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 23:12:55,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:12:55 BoogieIcfgContainer [2020-11-29 23:12:55,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:12:55,704 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:12:55,704 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:12:55,705 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:12:55,705 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:12:48" (3/4) ... [2020-11-29 23:12:55,707 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:12:55,776 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_939c76fa-3a3c-433d-abe6-7013111d1386/bin/uautomizer/witness.graphml [2020-11-29 23:12:55,776 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:12:55,778 INFO L168 Benchmark]: Toolchain (without parser) took 7484.89 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 72.8 MB in the beginning and 63.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2020-11-29 23:12:55,779 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory is still 59.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:12:55,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.76 ms. Allocated memory is still 100.7 MB. Free memory was 72.8 MB in the beginning and 78.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:12:55,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.05 ms. Allocated memory is still 100.7 MB. Free memory was 78.3 MB in the beginning and 76.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:12:55,788 INFO L168 Benchmark]: Boogie Preprocessor took 21.89 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 75.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:12:55,790 INFO L168 Benchmark]: RCFGBuilder took 303.95 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 62.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:12:55,791 INFO L168 Benchmark]: TraceAbstraction took 6775.58 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 62.2 MB in the beginning and 67.7 MB in the end (delta: -5.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:12:55,793 INFO L168 Benchmark]: Witness Printer took 72.17 ms. Allocated memory is still 121.6 MB. Free memory was 67.7 MB in the beginning and 63.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:12:55,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 100.7 MB. Free memory is still 59.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.76 ms. Allocated memory is still 100.7 MB. Free memory was 72.8 MB in the beginning and 78.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.05 ms. Allocated memory is still 100.7 MB. Free memory was 78.3 MB in the beginning and 76.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.89 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 75.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 303.95 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 62.9 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6775.58 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 62.2 MB in the beginning and 67.7 MB in the end (delta: -5.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. * Witness Printer took 72.17 ms. Allocated memory is still 121.6 MB. Free memory was 67.7 MB in the beginning and 63.5 MB in the end (delta: 4.2 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: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND FALSE !(counter++<5) [L16] COND TRUE !(cond) VAL [counter=6] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.6s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 103 SDslu, 229 SDs, 0 SdLazy, 124 SolverSat, 26 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 7350 SizeOfPredicates, 28 NumberOfNonLiveVariables, 680 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...