./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 c3764edd0ff82cc2ff392719542cb80230c47723 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-69874e2 [2020-12-01 14:57:04,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 14:57:04,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 14:57:04,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 14:57:04,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 14:57:04,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 14:57:04,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 14:57:04,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 14:57:04,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 14:57:04,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 14:57:04,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 14:57:04,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 14:57:04,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 14:57:04,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 14:57:04,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 14:57:04,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 14:57:04,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 14:57:04,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 14:57:04,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 14:57:04,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 14:57:04,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 14:57:04,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 14:57:04,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 14:57:04,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 14:57:04,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 14:57:04,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 14:57:04,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 14:57:04,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 14:57:04,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 14:57:04,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 14:57:04,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 14:57:04,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 14:57:04,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 14:57:04,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 14:57:04,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 14:57:04,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 14:57:04,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 14:57:04,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 14:57:04,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 14:57:04,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 14:57:04,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 14:57:04,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 14:57:04,950 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 14:57:04,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 14:57:04,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 14:57:04,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 14:57:04,952 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 14:57:04,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 14:57:04,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 14:57:04,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 14:57:04,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 14:57:04,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 14:57:04,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 14:57:04,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 14:57:04,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 14:57:04,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 14:57:04,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 14:57:04,955 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 14:57:04,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 14:57:04,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 14:57:04,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 14:57:04,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 14:57:04,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 14:57:04,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 14:57:04,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 14:57:04,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 14:57:04,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 14:57:04,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 14:57:04,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 14:57:04,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 14:57:04,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 14:57:04,959 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_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3764edd0ff82cc2ff392719542cb80230c47723 [2020-12-01 14:57:05,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 14:57:05,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 14:57:05,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 14:57:05,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 14:57:05,232 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 14:57:05,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-12-01 14:57:05,328 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/data/617c7f941/fe1c800926b84e4cb3b17e91ce89a2a2/FLAG93c556c9d [2020-12-01 14:57:05,818 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 14:57:05,819 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-12-01 14:57:05,834 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/data/617c7f941/fe1c800926b84e4cb3b17e91ce89a2a2/FLAG93c556c9d [2020-12-01 14:57:06,169 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/data/617c7f941/fe1c800926b84e4cb3b17e91ce89a2a2 [2020-12-01 14:57:06,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 14:57:06,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 14:57:06,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 14:57:06,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 14:57:06,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 14:57:06,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7696a7fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06, skipping insertion in model container [2020-12-01 14:57:06,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 14:57:06,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 14:57:06,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:57:06,437 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 14:57:06,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 14:57:06,507 INFO L208 MainTranslator]: Completed translation [2020-12-01 14:57:06,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06 WrapperNode [2020-12-01 14:57:06,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 14:57:06,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 14:57:06,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 14:57:06,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 14:57:06,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 14:57:06,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 14:57:06,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 14:57:06,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 14:57:06,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... [2020-12-01 14:57:06,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 14:57:06,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 14:57:06,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 14:57:06,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 14:57:06,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 14:57:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 14:57:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 14:57:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-01 14:57:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 14:57:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 14:57:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 14:57:06,966 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 14:57:06,967 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-01 14:57:06,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:06 BoogieIcfgContainer [2020-12-01 14:57:06,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 14:57:06,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 14:57:06,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 14:57:06,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 14:57:06,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 02:57:06" (1/3) ... [2020-12-01 14:57:06,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7994749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:57:06, skipping insertion in model container [2020-12-01 14:57:06,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:57:06" (2/3) ... [2020-12-01 14:57:06,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7994749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 02:57:06, skipping insertion in model container [2020-12-01 14:57:06,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:06" (3/3) ... [2020-12-01 14:57:06,997 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-12-01 14:57:07,013 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 14:57:07,016 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 14:57:07,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 14:57:07,054 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 14:57:07,055 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 14:57:07,055 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 14:57:07,055 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 14:57:07,055 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 14:57:07,056 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 14:57:07,056 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 14:57:07,056 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 14:57:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-01 14:57:07,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 14:57:07,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:07,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:07,078 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:07,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:07,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-12-01 14:57:07,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:07,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183729261] [2020-12-01 14:57:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:07,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183729261] [2020-12-01 14:57:07,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:07,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 14:57:07,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334682866] [2020-12-01 14:57:07,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 14:57:07,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 14:57:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 14:57:07,339 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-12-01 14:57:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:07,364 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-12-01 14:57:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 14:57:07,366 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-01 14:57:07,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:07,377 INFO L225 Difference]: With dead ends: 43 [2020-12-01 14:57:07,377 INFO L226 Difference]: Without dead ends: 19 [2020-12-01 14:57:07,393 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 [2020-12-01 14:57:07,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-01 14:57:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-01 14:57:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-01 14:57:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-01 14:57:07,431 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-01 14:57:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:07,431 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-01 14:57:07,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 14:57:07,432 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-01 14:57:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 14:57:07,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:07,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:07,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 14:57:07,433 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-12-01 14:57:07,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:07,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924300811] [2020-12-01 14:57:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:07,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924300811] [2020-12-01 14:57:07,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 14:57:07,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 14:57:07,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258434575] [2020-12-01 14:57:07,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 14:57:07,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:07,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 14:57:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:07,527 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-12-01 14:57:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:07,657 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-12-01 14:57:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 14:57:07,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-01 14:57:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:07,659 INFO L225 Difference]: With dead ends: 45 [2020-12-01 14:57:07,660 INFO L226 Difference]: Without dead ends: 31 [2020-12-01 14:57:07,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-01 14:57:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-01 14:57:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-01 14:57:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-01 14:57:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-01 14:57:07,668 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-01 14:57:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:07,669 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-01 14:57:07,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 14:57:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-01 14:57:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-01 14:57:07,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:07,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:07,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 14:57:07,672 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-12-01 14:57:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:07,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963286691] [2020-12-01 14:57:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:07,702 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:57:07,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822368842] [2020-12-01 14:57:07,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:07,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-01 14:57:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:08,032 INFO L382 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 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-01 14:57:08,034 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:08,039 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:08,039 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:08,040 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-01 14:57:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:08,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963286691] [2020-12-01 14:57:08,132 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:57:08,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822368842] [2020-12-01 14:57:08,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:08,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-01 14:57:08,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725773917] [2020-12-01 14:57:08,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 14:57:08,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 14:57:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:57:08,141 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 9 states. [2020-12-01 14:57:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:08,565 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-12-01 14:57:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 14:57:08,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-01 14:57:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:08,570 INFO L225 Difference]: With dead ends: 45 [2020-12-01 14:57:08,570 INFO L226 Difference]: Without dead ends: 43 [2020-12-01 14:57:08,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-12-01 14:57:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-01 14:57:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2020-12-01 14:57:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-01 14:57:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-01 14:57:08,583 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-12-01 14:57:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:08,584 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-01 14:57:08,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 14:57:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-01 14:57:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 14:57:08,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:08,586 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:08,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-01 14:57:08,802 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash -689607655, now seen corresponding path program 1 times [2020-12-01 14:57:08,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:08,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677711463] [2020-12-01 14:57:08,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:08,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:57:08,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131935794] [2020-12-01 14:57:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 14:57:08,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 14:57:09,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677711463] [2020-12-01 14:57:09,005 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:57:09,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131935794] [2020-12-01 14:57:09,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:09,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-01 14:57:09,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120294512] [2020-12-01 14:57:09,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 14:57:09,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:09,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 14:57:09,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-01 14:57:09,011 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-12-01 14:57:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:09,191 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-12-01 14:57:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 14:57:09,192 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-01 14:57:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:09,193 INFO L225 Difference]: With dead ends: 65 [2020-12-01 14:57:09,193 INFO L226 Difference]: Without dead ends: 41 [2020-12-01 14:57:09,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-01 14:57:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-01 14:57:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-12-01 14:57:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-01 14:57:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-01 14:57:09,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-12-01 14:57:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:09,200 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-01 14:57:09,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 14:57:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-01 14:57:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 14:57:09,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:09,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:09,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:09,420 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash 489568854, now seen corresponding path program 1 times [2020-12-01 14:57:09,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:09,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199495644] [2020-12-01 14:57:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:09,464 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:57:09,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826126725] [2020-12-01 14:57:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 14:57:09,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-01 14:57:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:09,569 INFO L382 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 [2020-12-01 14:57:09,573 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,578 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:09,579 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-01 14:57:09,601 INFO L382 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 11 treesize of output 7 [2020-12-01 14:57:09,602 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,610 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:09,611 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,611 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-12-01 14:57:09,675 INFO L348 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-12-01 14:57:09,676 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2020-12-01 14:57:09,679 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,688 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:09,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,690 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:29 [2020-12-01 14:57:09,781 INFO L348 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-12-01 14:57:09,782 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2020-12-01 14:57:09,785 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:09,803 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,804 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:37 [2020-12-01 14:57:09,954 INFO L348 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-12-01 14:57:09,955 INFO L382 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 2 case distinctions, treesize of input 53 treesize of output 46 [2020-12-01 14:57:09,964 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:09,983 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:09,998 INFO L547 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. [2020-12-01 14:57:09,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:69 [2020-12-01 14:57:10,371 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 14:57:10,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 14:57:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:10,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199495644] [2020-12-01 14:57:10,432 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:57:10,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826126725] [2020-12-01 14:57:10,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:10,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-01 14:57:10,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208875459] [2020-12-01 14:57:10,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-01 14:57:10,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:10,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 14:57:10,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-01 14:57:10,435 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 13 states. [2020-12-01 14:57:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:14,307 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-12-01 14:57:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-01 14:57:14,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-01 14:57:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:14,309 INFO L225 Difference]: With dead ends: 84 [2020-12-01 14:57:14,309 INFO L226 Difference]: Without dead ends: 62 [2020-12-01 14:57:14,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-12-01 14:57:14,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-01 14:57:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 38. [2020-12-01 14:57:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-01 14:57:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-12-01 14:57:14,318 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 28 [2020-12-01 14:57:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:14,319 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-12-01 14:57:14,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-01 14:57:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-12-01 14:57:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-01 14:57:14,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:14,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:14,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:14,539 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash 4752585, now seen corresponding path program 2 times [2020-12-01 14:57:14,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:14,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837909039] [2020-12-01 14:57:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:14,564 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:57:14,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136565581] [2020-12-01 14:57:14,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:14,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 14:57:14,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 14:57:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:57:14,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837909039] [2020-12-01 14:57:14,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:57:14,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136565581] [2020-12-01 14:57:14,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:14,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-01 14:57:14,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460661541] [2020-12-01 14:57:14,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 14:57:14,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 14:57:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-01 14:57:14,746 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-12-01 14:57:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:14,938 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-12-01 14:57:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-01 14:57:14,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-12-01 14:57:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:14,940 INFO L225 Difference]: With dead ends: 94 [2020-12-01 14:57:14,940 INFO L226 Difference]: Without dead ends: 53 [2020-12-01 14:57:14,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-01 14:57:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-01 14:57:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2020-12-01 14:57:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-01 14:57:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-01 14:57:14,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2020-12-01 14:57:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:14,949 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-01 14:57:14,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 14:57:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-01 14:57:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 14:57:14,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:14,951 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:15,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:15,165 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1587543303, now seen corresponding path program 3 times [2020-12-01 14:57:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:15,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945379712] [2020-12-01 14:57:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:15,209 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:57:15,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599976649] [2020-12-01 14:57:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:15,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-01 14:57:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-01 14:57:15,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:15,372 INFO L382 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 [2020-12-01 14:57:15,373 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:15,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:15,382 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:15,383 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-01 14:57:15,410 INFO L382 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 11 treesize of output 7 [2020-12-01 14:57:15,411 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:15,421 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:15,422 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:15,422 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-01 14:57:15,518 INFO L348 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-12-01 14:57:15,519 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 62 [2020-12-01 14:57:15,523 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:15,570 INFO L625 ElimStorePlain]: treesize reduction 25, result has 66.2 percent of original size [2020-12-01 14:57:15,571 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-01 14:57:15,572 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:49 [2020-12-01 14:57:15,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 14:57:15,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 14:57:15,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:15,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:15,895 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:15,895 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 56 treesize of output 242 [2020-12-01 14:57:15,903 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-12-01 14:57:15,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 14:57:15,905 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-12-01 14:57:15,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 14:57:15,906 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-01 14:57:15,907 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 14:57:15,908 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-01 14:57:15,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 14:57:15,909 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-01 14:57:15,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 14:57:15,925 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:15,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:15,991 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:15,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 133 [2020-12-01 14:57:15,995 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-12-01 14:57:15,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 14:57:15,996 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-12-01 14:57:15,997 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 14:57:15,998 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-12-01 14:57:15,998 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 14:57:16,003 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:16,421 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 52 [2020-12-01 14:57:16,423 INFO L625 ElimStorePlain]: treesize reduction 569, result has 20.1 percent of original size [2020-12-01 14:57:16,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 14:57:16,427 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-01 14:57:16,428 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:133, output treesize:106 [2020-12-01 14:57:16,519 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 14:57:16,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 14:57:16,702 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-01 14:57:16,938 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-12-01 14:57:17,126 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-01 14:57:17,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,180 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:17,181 INFO L382 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 2 case distinctions, treesize of input 41 treesize of output 71 [2020-12-01 14:57:17,184 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,206 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2020-12-01 14:57:17,208 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,261 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:17,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 111 [2020-12-01 14:57:17,267 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:17,453 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-12-01 14:57:17,454 INFO L625 ElimStorePlain]: treesize reduction 123, result has 56.8 percent of original size [2020-12-01 14:57:17,465 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2020-12-01 14:57:17,465 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:178, output treesize:162 [2020-12-01 14:57:17,819 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-01 14:57:17,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,846 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:17,876 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:17,927 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:17,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 147 [2020-12-01 14:57:17,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,951 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:17,969 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:17,973 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:18,093 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-01 14:57:18,094 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:18,094 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 14 case distinctions, treesize of input 72 treesize of output 253 [2020-12-01 14:57:18,098 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 3, 2, 1] term [2020-12-01 14:57:18,099 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 14:57:18,102 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 3, 2, 1] term [2020-12-01 14:57:18,103 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-01 14:57:18,104 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 1] term [2020-12-01 14:57:18,104 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 14:57:18,107 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 1] term [2020-12-01 14:57:18,107 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 14:57:18,108 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-12-01 14:57:18,108 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-01 14:57:18,114 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:18,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:18,129 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:18,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:18,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:18,134 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 64 [2020-12-01 14:57:18,137 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:18,413 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 70 [2020-12-01 14:57:18,414 INFO L625 ElimStorePlain]: treesize reduction 272, result has 50.8 percent of original size [2020-12-01 14:57:18,417 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2020-12-01 14:57:18,418 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:267, output treesize:281 [2020-12-01 14:57:18,622 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-12-01 14:57:18,888 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-01 14:57:18,901 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-01 14:57:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,048 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-01 14:57:19,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-01 14:57:19,115 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 14:57:19,115 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 74 treesize of output 202 [2020-12-01 14:57:19,120 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-12-01 14:57:19,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 14:57:19,122 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 3, 2, 1] term [2020-12-01 14:57:19,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-01 14:57:19,123 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 1] term [2020-12-01 14:57:19,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 14:57:19,128 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 14:57:19,219 INFO L625 ElimStorePlain]: treesize reduction 216, result has 25.8 percent of original size [2020-12-01 14:57:19,224 INFO L547 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. [2020-12-01 14:57:19,224 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:75 [2020-12-01 14:57:20,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 14:57:20,943 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-01 14:57:20,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-01 14:57:20,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-01 14:57:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 14:57:21,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945379712] [2020-12-01 14:57:21,018 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:57:21,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599976649] [2020-12-01 14:57:21,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:21,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-01 14:57:21,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617281096] [2020-12-01 14:57:21,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-01 14:57:21,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-01 14:57:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-01 14:57:21,021 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 21 states. [2020-12-01 14:57:21,848 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2020-12-01 14:57:22,176 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2020-12-01 14:57:22,415 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-12-01 14:57:22,617 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-12-01 14:57:22,828 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-12-01 14:57:23,098 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2020-12-01 14:57:23,533 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 53 [2020-12-01 14:57:23,815 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 67 [2020-12-01 14:57:26,216 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 71 [2020-12-01 14:57:26,497 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-12-01 14:57:28,864 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-12-01 14:57:29,272 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2020-12-01 14:57:29,528 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2020-12-01 14:57:30,423 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 75 [2020-12-01 14:57:31,132 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2020-12-01 14:57:31,611 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 64 [2020-12-01 14:57:32,240 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 77 [2020-12-01 14:57:33,333 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 66 [2020-12-01 14:57:33,711 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2020-12-01 14:57:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:33,712 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-12-01 14:57:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-01 14:57:33,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-12-01 14:57:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:33,717 INFO L225 Difference]: With dead ends: 87 [2020-12-01 14:57:33,718 INFO L226 Difference]: Without dead ends: 70 [2020-12-01 14:57:33,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=510, Invalid=1745, Unknown=1, NotChecked=0, Total=2256 [2020-12-01 14:57:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-01 14:57:33,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2020-12-01 14:57:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-01 14:57:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-12-01 14:57:33,736 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 34 [2020-12-01 14:57:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:33,736 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-12-01 14:57:33,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-01 14:57:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-01 14:57:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-01 14:57:33,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:33,737 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:33,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-01 14:57:33,943 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1649683130, now seen corresponding path program 4 times [2020-12-01 14:57:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:33,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632190802] [2020-12-01 14:57:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:33,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:57:33,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840369936] [2020-12-01 14:57:33,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:34,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 14:57:34,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 14:57:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 14:57:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 14:57:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 14:57:34,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632190802] [2020-12-01 14:57:34,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-01 14:57:34,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840369936] [2020-12-01 14:57:34,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-01 14:57:34,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-01 14:57:34,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593062333] [2020-12-01 14:57:34,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 14:57:34,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 14:57:34,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 14:57:34,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-01 14:57:34,163 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 11 states. [2020-12-01 14:57:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 14:57:34,430 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2020-12-01 14:57:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-01 14:57:34,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-01 14:57:34,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 14:57:34,434 INFO L225 Difference]: With dead ends: 118 [2020-12-01 14:57:34,434 INFO L226 Difference]: Without dead ends: 90 [2020-12-01 14:57:34,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-01 14:57:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-01 14:57:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2020-12-01 14:57:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-01 14:57:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-01 14:57:34,450 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 37 [2020-12-01 14:57:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 14:57:34,450 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-01 14:57:34,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 14:57:34,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-01 14:57:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-01 14:57:34,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 14:57:34,452 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 14:57:34,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:34,671 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 14:57:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 14:57:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 666565613, now seen corresponding path program 5 times [2020-12-01 14:57:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 14:57:34,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252845367] [2020-12-01 14:57:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 14:57:34,692 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 14:57:34,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408939518] [2020-12-01 14:57:34,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/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 [2020-12-01 14:57:34,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-01 14:57:34,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-01 14:57:34,802 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 14:57:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 14:57:34,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 14:57:34,972 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 14:57:34,972 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 14:57:35,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 14:57:35,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 02:57:35 BoogieIcfgContainer [2020-12-01 14:57:35,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 14:57:35,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 14:57:35,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 14:57:35,255 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 14:57:35,256 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:57:06" (3/4) ... [2020-12-01 14:57:35,263 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 14:57:35,355 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cf80f61a-4f5d-42ee-bdfc-929bab72bb78/bin/uautomizer/witness.graphml [2020-12-01 14:57:35,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 14:57:35,356 INFO L168 Benchmark]: Toolchain (without parser) took 29183.18 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 57.2 MB in the beginning and 113.3 MB in the end (delta: -56.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:35,357 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 46.8 MB in the beginning and 46.8 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:57:35,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.52 ms. Allocated memory is still 88.1 MB. Free memory was 57.0 MB in the beginning and 65.6 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:35,357 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.88 ms. Allocated memory is still 88.1 MB. Free memory was 65.6 MB in the beginning and 63.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:35,358 INFO L168 Benchmark]: Boogie Preprocessor took 30.64 ms. Allocated memory is still 88.1 MB. Free memory was 63.9 MB in the beginning and 62.9 MB in the end (delta: 971.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:57:35,358 INFO L168 Benchmark]: RCFGBuilder took 384.76 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 47.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:35,359 INFO L168 Benchmark]: TraceAbstraction took 28283.55 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 47.1 MB in the beginning and 117.5 MB in the end (delta: -70.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 14:57:35,359 INFO L168 Benchmark]: Witness Printer took 100.47 ms. Allocated memory is still 157.3 MB. Free memory was 117.5 MB in the beginning and 113.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-01 14:57:35,361 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 88.1 MB. Free memory was 46.8 MB in the beginning and 46.8 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.52 ms. Allocated memory is still 88.1 MB. Free memory was 57.0 MB in the beginning and 65.6 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.88 ms. Allocated memory is still 88.1 MB. Free memory was 65.6 MB in the beginning and 63.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.64 ms. Allocated memory is still 88.1 MB. Free memory was 63.9 MB in the beginning and 62.9 MB in the end (delta: 971.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 384.76 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 47.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 28283.55 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 47.1 MB in the beginning and 117.5 MB in the end (delta: -70.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 100.47 ms. Allocated memory is still 157.3 MB. Free memory was 117.5 MB in the beginning and 113.3 MB in the end (delta: 4.2 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=3] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=3] [L31] COND TRUE i