./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8ffdb7e52f13c5228ce15f1d79a563f57556d0a ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-7b2dab5 [2020-12-09 04:50:49,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:50:49,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:50:49,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:50:49,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:50:49,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:50:49,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:50:49,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:50:49,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:50:49,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:50:49,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:50:49,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:50:49,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:50:49,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:50:49,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:50:49,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:50:49,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:50:49,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:50:49,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:50:49,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:50:49,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:50:49,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:50:49,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:50:49,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:50:49,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:50:49,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:50:49,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:50:49,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:50:49,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:50:49,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:50:49,962 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:50:49,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:50:49,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:50:49,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:50:49,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:50:49,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:50:49,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:50:49,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:50:49,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:50:49,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:50:49,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:50:49,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:50:49,993 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:50:49,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:50:49,994 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:50:49,994 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:50:49,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:50:49,994 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:50:49,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:50:49,995 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:50:49,995 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:50:49,995 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:50:49,995 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:50:49,995 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:50:49,996 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:50:49,996 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:50:49,996 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:50:49,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:50:49,997 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:50:49,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:50:49,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:50:49,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:50:49,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:50:49,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:50:49,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:50:49,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:50:49,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:50:49,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:50:49,998 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:50:49,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:50:49,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:50:49,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:50:49,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:50:49,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:50:50,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:50:50,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:50:50,000 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:50:50,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:50:50,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:50:50,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:50:50,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:50:50,001 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ffdb7e52f13c5228ce15f1d79a563f57556d0a [2020-12-09 04:50:50,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:50:50,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:50:50,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:50:50,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:50:50,207 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:50:50,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-12-09 04:50:50,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/data/f0b57fd03/d3ed1ce948da40e6bd3ac86fae255b28/FLAG06888fe44 [2020-12-09 04:50:50,623 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:50:50,624 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2020-12-09 04:50:50,628 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/data/f0b57fd03/d3ed1ce948da40e6bd3ac86fae255b28/FLAG06888fe44 [2020-12-09 04:50:50,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/data/f0b57fd03/d3ed1ce948da40e6bd3ac86fae255b28 [2020-12-09 04:50:50,639 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:50:50,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:50:50,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:50:50,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:50:50,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:50:50,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71aac0f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50, skipping insertion in model container [2020-12-09 04:50:50,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:50:50,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:50:50,757 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2020-12-09 04:50:50,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:50:50,779 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:50:50,791 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2020-12-09 04:50:50,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:50:50,809 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:50:50,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50 WrapperNode [2020-12-09 04:50:50,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:50:50,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:50:50,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:50:50,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:50:50,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:50:50,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:50:50,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:50:50,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:50:50,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... [2020-12-09 04:50:50,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:50:50,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:50:50,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:50:50,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:50:50,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:50:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:50:50,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:50:50,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:50:51,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:50:51,172 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 04:50:51,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:51 BoogieIcfgContainer [2020-12-09 04:50:51,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:50:51,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:50:51,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:50:51,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:50:51,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:50:50" (1/3) ... [2020-12-09 04:50:51,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b379a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:50:51, skipping insertion in model container [2020-12-09 04:50:51,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:50" (2/3) ... [2020-12-09 04:50:51,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b379a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:50:51, skipping insertion in model container [2020-12-09 04:50:51,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:51" (3/3) ... [2020-12-09 04:50:51,180 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2020-12-09 04:50:51,190 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:50:51,192 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-09 04:50:51,199 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-09 04:50:51,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:50:51,216 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:50:51,216 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:50:51,216 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:50:51,216 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:50:51,216 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:50:51,216 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:50:51,216 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:50:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 04:50:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 04:50:51,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:51,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 04:50:51,229 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash 98480205, now seen corresponding path program 1 times [2020-12-09 04:50:51,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:51,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894732379] [2020-12-09 04:50:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:50:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:51,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894732379] [2020-12-09 04:50:51,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:50:51,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:50:51,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293643885] [2020-12-09 04:50:51,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 04:50:51,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:50:51,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 04:50:51,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:50:51,356 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-09 04:50:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:50:51,366 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-12-09 04:50:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:50:51,367 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 04:50:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:50:51,375 INFO L225 Difference]: With dead ends: 25 [2020-12-09 04:50:51,376 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 04:50:51,378 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 [2020-12-09 04:50:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 04:50:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 04:50:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 04:50:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 04:50:51,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-12-09 04:50:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:50:51,400 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 04:50:51,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 04:50:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 04:50:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 04:50:51,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:51,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 04:50:51,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:50:51,401 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:51,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 97621232, now seen corresponding path program 1 times [2020-12-09 04:50:51,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:51,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977401057] [2020-12-09 04:50:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:51,418 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:50:51,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066442580] [2020-12-09 04:50:51,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:50:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 04:50:51,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:50:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:51,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:50:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:51,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977401057] [2020-12-09 04:50:51,545 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:51,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066442580] [2020-12-09 04:50:51,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:50:51,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 04:50:51,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206959770] [2020-12-09 04:50:51,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:50:51,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:50:51,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:50:51,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:50:51,548 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2020-12-09 04:50:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:50:51,600 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-09 04:50:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 04:50:51,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 04:50:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:50:51,601 INFO L225 Difference]: With dead ends: 20 [2020-12-09 04:50:51,602 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 04:50:51,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:50:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 04:50:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 9. [2020-12-09 04:50:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 04:50:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-09 04:50:51,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2020-12-09 04:50:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:50:51,606 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-09 04:50:51,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:50:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-09 04:50:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 04:50:51,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:51,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 04:50:51,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 04:50:51,808 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1268746775, now seen corresponding path program 1 times [2020-12-09 04:50:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:51,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336976080] [2020-12-09 04:50:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:51,819 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:50:51,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155928772] [2020-12-09 04:50:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:50:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 04:50:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:50:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:51,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:50:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:51,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336976080] [2020-12-09 04:50:51,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:51,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155928772] [2020-12-09 04:50:51,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:50:51,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 04:50:51,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37164476] [2020-12-09 04:50:51,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:50:51,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:50:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:50:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:50:51,882 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 6 states. [2020-12-09 04:50:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:50:51,904 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-12-09 04:50:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 04:50:51,905 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-12-09 04:50:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:50:51,906 INFO L225 Difference]: With dead ends: 23 [2020-12-09 04:50:51,906 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 04:50:51,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:50:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 04:50:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-12-09 04:50:51,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 04:50:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-09 04:50:51,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2020-12-09 04:50:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:50:51,912 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-09 04:50:51,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:50:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-09 04:50:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 04:50:51,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:51,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:50:52,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:50:52,115 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:52,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 546169794, now seen corresponding path program 1 times [2020-12-09 04:50:52,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:52,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754975816] [2020-12-09 04:50:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:52,152 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:50:52,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25784503] [2020-12-09 04:50:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:50:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 04:50:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:50:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:52,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:50:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:52,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754975816] [2020-12-09 04:50:52,294 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:52,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25784503] [2020-12-09 04:50:52,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:50:52,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2020-12-09 04:50:52,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828464591] [2020-12-09 04:50:52,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 04:50:52,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:50:52,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 04:50:52,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-09 04:50:52,296 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 11 states. [2020-12-09 04:50:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:50:52,372 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-09 04:50:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:50:52,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2020-12-09 04:50:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:50:52,373 INFO L225 Difference]: With dead ends: 19 [2020-12-09 04:50:52,373 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 04:50:52,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-09 04:50:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 04:50:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 04:50:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 04:50:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 04:50:52,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2020-12-09 04:50:52,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:50:52,377 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 04:50:52,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 04:50:52,377 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 04:50:52,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 04:50:52,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:52,377 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 04:50:52,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:50:52,579 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1998402165, now seen corresponding path program 1 times [2020-12-09 04:50:52,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:52,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098933642] [2020-12-09 04:50:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:52,619 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:50:52,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368081319] [2020-12-09 04:50:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:50:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:50:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:50:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:52,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:50:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:52,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098933642] [2020-12-09 04:50:52,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:52,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368081319] [2020-12-09 04:50:52,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641139281] [2020-12-09 04:50:52,880 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 04:50:52,880 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:50:52,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:50:52,887 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:50:52,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:50:52,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:50:53,392 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:50:53,691 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-12-09 04:50:53,924 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 04:50:54,026 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:54,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:50:54,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-09 04:50:54,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091122244] [2020-12-09 04:50:54,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 04:50:54,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:50:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 04:50:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-09 04:50:54,028 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2020-12-09 04:50:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:50:54,096 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-09 04:50:54,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 04:50:54,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-09 04:50:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:50:54,097 INFO L225 Difference]: With dead ends: 35 [2020-12-09 04:50:54,097 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 04:50:54,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-12-09 04:50:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 04:50:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 04:50:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 04:50:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-09 04:50:54,103 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 14 [2020-12-09 04:50:54,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:50:54,103 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-09 04:50:54,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 04:50:54,103 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-09 04:50:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 04:50:54,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:54,104 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1] [2020-12-09 04:50:54,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:50:54,306 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash 652162767, now seen corresponding path program 2 times [2020-12-09 04:50:54,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:54,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303205328] [2020-12-09 04:50:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:54,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:50:54,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838121329] [2020-12-09 04:50:54,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:54,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-09 04:50:54,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:50:54,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 04:50:54,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:50:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:54,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:50:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:54,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303205328] [2020-12-09 04:50:54,636 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838121329] [2020-12-09 04:50:54,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544533670] [2020-12-09 04:50:54,639 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 04:50:54,639 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:50:54,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:50:54,639 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:50:54,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:50:54,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:50:54,921 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:50:55,347 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-12-09 04:50:55,448 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:55,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:50:55,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-09 04:50:55,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47911207] [2020-12-09 04:50:55,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 04:50:55,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:50:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 04:50:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2020-12-09 04:50:55,450 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 18 states. [2020-12-09 04:50:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:50:55,629 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-12-09 04:50:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-09 04:50:55,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-12-09 04:50:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:50:55,630 INFO L225 Difference]: With dead ends: 67 [2020-12-09 04:50:55,630 INFO L226 Difference]: Without dead ends: 63 [2020-12-09 04:50:55,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=1040, Unknown=0, NotChecked=0, Total=1406 [2020-12-09 04:50:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-09 04:50:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-09 04:50:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-09 04:50:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-09 04:50:55,639 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 30 [2020-12-09 04:50:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:50:55,639 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-09 04:50:55,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 04:50:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-09 04:50:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-09 04:50:55,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:55,641 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1] [2020-12-09 04:50:55,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-09 04:50:55,841 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:55,842 INFO L82 PathProgramCache]: Analyzing trace with hash -43060905, now seen corresponding path program 3 times [2020-12-09 04:50:55,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:55,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059783859] [2020-12-09 04:50:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:55,850 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:50:55,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352830453] [2020-12-09 04:50:55,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:55,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 04:50:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 04:50:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-09 04:50:55,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:50:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:56,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:50:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:50:56,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059783859] [2020-12-09 04:50:56,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:56,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352830453] [2020-12-09 04:50:56,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101629599] [2020-12-09 04:50:56,213 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 04:50:56,213 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:50:56,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:50:56,213 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:50:56,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:50:56,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:50:56,441 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:50:56,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:50:56,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:50:56,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2020-12-09 04:50:56,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131244616] [2020-12-09 04:50:56,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 04:50:56,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:50:56,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 04:50:56,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2020-12-09 04:50:56,975 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 24 states. [2020-12-09 04:50:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:50:57,237 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-12-09 04:50:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-09 04:50:57,237 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-12-09 04:50:57,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:50:57,238 INFO L225 Difference]: With dead ends: 91 [2020-12-09 04:50:57,239 INFO L226 Difference]: Without dead ends: 87 [2020-12-09 04:50:57,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=695, Invalid=1755, Unknown=0, NotChecked=0, Total=2450 [2020-12-09 04:50:57,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-09 04:50:57,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-09 04:50:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-09 04:50:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-09 04:50:57,248 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 62 [2020-12-09 04:50:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:50:57,249 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-09 04:50:57,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 04:50:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-09 04:50:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-09 04:50:57,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:50:57,250 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2020-12-09 04:50:57,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:50:57,452 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 04:50:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:50:57,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1481783235, now seen corresponding path program 4 times [2020-12-09 04:50:57,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:50:57,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208533523] [2020-12-09 04:50:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:50:57,478 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:50:57,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510802934] [2020-12-09 04:50:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/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 [2020-12-09 04:50:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:50:57,570 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:50:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:50:57,614 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:50:57,794 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 04:50:57,795 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:50:57,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:50:58,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:50:58 BoogieIcfgContainer [2020-12-09 04:50:58,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:50:58,061 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:50:58,061 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:50:58,061 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:50:58,061 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:50:51" (3/4) ... [2020-12-09 04:50:58,063 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:50:58,123 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b92617e9-056c-463e-8a4e-ef9d35abb90d/bin/utaipan/witness.graphml [2020-12-09 04:50:58,123 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:50:58,124 INFO L168 Benchmark]: Toolchain (without parser) took 7483.38 ms. Allocated memory was 81.8 MB in the beginning and 144.7 MB in the end (delta: 62.9 MB). Free memory was 41.7 MB in the beginning and 115.6 MB in the end (delta: -73.9 MB). Peak memory consumption was 72.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:58,124 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 81.8 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 104.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:50:58,124 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.71 ms. Allocated memory is still 81.8 MB. Free memory was 61.7 MB in the beginning and 51.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:58,125 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.00 ms. Allocated memory is still 81.8 MB. Free memory was 51.9 MB in the beginning and 50.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:58,125 INFO L168 Benchmark]: Boogie Preprocessor took 16.73 ms. Allocated memory is still 81.8 MB. Free memory was 50.3 MB in the beginning and 49.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:58,125 INFO L168 Benchmark]: RCFGBuilder took 314.00 ms. Allocated memory is still 81.8 MB. Free memory was 49.3 MB in the beginning and 47.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:58,125 INFO L168 Benchmark]: TraceAbstraction took 6885.94 ms. Allocated memory was 81.8 MB in the beginning and 144.7 MB in the end (delta: 62.9 MB). Free memory was 46.7 MB in the beginning and 39.5 MB in the end (delta: 7.2 MB). Peak memory consumption was 72.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:58,126 INFO L168 Benchmark]: Witness Printer took 61.91 ms. Allocated memory is still 144.7 MB. Free memory was 39.5 MB in the beginning and 115.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 04:50:58,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 81.8 MB. Free memory was 57.8 MB in the beginning and 57.7 MB in the end (delta: 104.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 164.71 ms. Allocated memory is still 81.8 MB. Free memory was 61.7 MB in the beginning and 51.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.00 ms. Allocated memory is still 81.8 MB. Free memory was 51.9 MB in the beginning and 50.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.73 ms. Allocated memory is still 81.8 MB. Free memory was 50.3 MB in the beginning and 49.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 314.00 ms. Allocated memory is still 81.8 MB. Free memory was 49.3 MB in the beginning and 47.0 MB in the end (delta: 2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6885.94 ms. Allocated memory was 81.8 MB in the beginning and 144.7 MB in the end (delta: 62.9 MB). Free memory was 46.7 MB in the beginning and 39.5 MB in the end (delta: 7.2 MB). Peak memory consumption was 72.5 MB. Max. memory is 16.1 GB. * Witness Printer took 61.91 ms. Allocated memory is still 144.7 MB. Free memory was 39.5 MB in the beginning and 115.6 MB in the end (delta: -76.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) [L13] COND FALSE !(!cond) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L18] reach_error() VAL [counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 70 SDslu, 194 SDs, 0 SdLazy, 158 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 389 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 242 ConstructedInterpolants, 0 QuantifiedInterpolants, 28295 SizeOfPredicates, 44 NumberOfNonLiveVariables, 637 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 0/944 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...