./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/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 1ee118516e232ad8cb9bc41eea534ff0bb107413 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:51:10,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:51:10,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:51:10,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:51:10,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:51:10,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:51:10,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:51:10,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:51:10,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:51:10,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:51:10,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:51:10,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:51:10,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:51:10,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:51:10,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:51:10,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:51:10,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:51:10,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:51:10,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:51:10,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:51:10,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:51:10,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:51:10,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:51:10,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:51:10,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:51:10,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:51:10,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:51:10,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:51:10,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:51:10,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:51:10,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:51:10,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:51:10,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:51:10,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:51:10,981 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:51:10,981 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:51:10,982 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:51:10,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:51:10,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:51:10,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:51:10,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:51:10,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:51:11,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:51:11,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:51:11,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:51:11,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:51:11,048 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:51:11,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:51:11,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:51:11,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:51:11,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:51:11,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:51:11,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:51:11,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:51:11,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:51:11,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:51:11,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:51:11,053 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:51:11,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:51:11,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:51:11,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:51:11,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:51:11,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:51:11,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:51:11,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:51:11,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:51:11,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:51:11,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:51:11,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:51:11,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:51:11,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:51:11,057 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_6d2a5e97-e8b2-4321-8ee3-974608a4145b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ee118516e232ad8cb9bc41eea534ff0bb107413 [2020-11-29 19:51:11,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:51:11,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:51:11,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:51:11,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:51:11,557 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:51:11,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c [2020-11-29 19:51:11,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/data/c48ccb4ad/d7b6a9be83d44d9a93b7ee2df99d32fa/FLAG627658f8b [2020-11-29 19:51:12,265 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:51:12,266 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound2.c [2020-11-29 19:51:12,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/data/c48ccb4ad/d7b6a9be83d44d9a93b7ee2df99d32fa/FLAG627658f8b [2020-11-29 19:51:12,598 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/data/c48ccb4ad/d7b6a9be83d44d9a93b7ee2df99d32fa [2020-11-29 19:51:12,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:51:12,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:51:12,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:51:12,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:51:12,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:51:12,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:12,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d52e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12, skipping insertion in model container [2020-11-29 19:51:12,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:12,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:51:12,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:51:12,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:51:12,932 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:51:12,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:51:12,999 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:51:13,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12 WrapperNode [2020-11-29 19:51:13,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:51:13,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:51:13,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:51:13,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:51:13,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:51:13,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:51:13,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:51:13,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:51:13,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... [2020-11-29 19:51:13,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:51:13,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:51:13,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:51:13,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:51:13,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:51:13,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:51:13,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:51:13,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:51:13,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:51:13,840 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:51:13,842 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-29 19:51:13,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:51:13 BoogieIcfgContainer [2020-11-29 19:51:13,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:51:13,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:51:13,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:51:13,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:51:13,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:51:12" (1/3) ... [2020-11-29 19:51:13,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ea379d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:51:13, skipping insertion in model container [2020-11-29 19:51:13,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:51:12" (2/3) ... [2020-11-29 19:51:13,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ea379d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:51:13, skipping insertion in model container [2020-11-29 19:51:13,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:51:13" (3/3) ... [2020-11-29 19:51:13,858 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound2.c [2020-11-29 19:51:13,872 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:51:13,878 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-29 19:51:13,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-29 19:51:13,938 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:51:13,940 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:51:13,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:51:13,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:51:13,941 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:51:13,941 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:51:13,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:51:13,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:51:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-29 19:51:13,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 19:51:13,971 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:13,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:13,973 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:13,983 INFO L82 PathProgramCache]: Analyzing trace with hash 120151435, now seen corresponding path program 1 times [2020-11-29 19:51:13,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:13,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331654882] [2020-11-29 19:51:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:51:14,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331654882] [2020-11-29 19:51:14,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:51:14,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:51:14,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065281536] [2020-11-29 19:51:14,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:51:14,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:51:14,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:51:14,248 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-11-29 19:51:14,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:14,279 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-11-29 19:51:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:51:14,281 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-29 19:51:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:14,302 INFO L225 Difference]: With dead ends: 41 [2020-11-29 19:51:14,305 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 19:51:14,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:51:14,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 19:51:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-29 19:51:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 19:51:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-11-29 19:51:14,390 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2020-11-29 19:51:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:14,391 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-11-29 19:51:14,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:51:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-11-29 19:51:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 19:51:14,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:14,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:14,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:51:14,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2020-11-29 19:51:14,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:14,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310677180] [2020-11-29 19:51:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:14,439 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:51:14,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243100413] [2020-11-29 19:51:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:51:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:51:14,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310677180] [2020-11-29 19:51:14,704 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:51:14,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243100413] [2020-11-29 19:51:14,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:51:14,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:51:14,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131166576] [2020-11-29 19:51:14,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:51:14,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:51:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:51:14,717 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-11-29 19:51:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:15,988 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-29 19:51:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:51:15,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 19:51:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:15,991 INFO L225 Difference]: With dead ends: 36 [2020-11-29 19:51:15,991 INFO L226 Difference]: Without dead ends: 25 [2020-11-29 19:51:15,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:51:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-29 19:51:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-29 19:51:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 19:51:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-29 19:51:16,002 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 8 [2020-11-29 19:51:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:16,004 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-29 19:51:16,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:51:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-29 19:51:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 19:51:16,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:16,007 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:16,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:51:16,222 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash -908536776, now seen corresponding path program 1 times [2020-11-29 19:51:16,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:16,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440244332] [2020-11-29 19:51:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:16,239 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:51:16,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697700372] [2020-11-29 19:51:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:16,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 19:51:16,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:51:16,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440244332] [2020-11-29 19:51:16,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:51:16,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697700372] [2020-11-29 19:51:16,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:51:16,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 19:51:16,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511940455] [2020-11-29 19:51:16,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:51:16,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:51:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:51:16,510 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-11-29 19:51:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:16,873 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-11-29 19:51:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 19:51:16,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-29 19:51:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:16,880 INFO L225 Difference]: With dead ends: 39 [2020-11-29 19:51:16,880 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 19:51:16,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:51:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 19:51:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-11-29 19:51:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:51:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-11-29 19:51:16,893 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2020-11-29 19:51:16,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:16,893 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-11-29 19:51:16,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:51:16,894 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-11-29 19:51:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 19:51:16,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:16,895 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:17,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:17,096 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 624012856, now seen corresponding path program 1 times [2020-11-29 19:51:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:17,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608353324] [2020-11-29 19:51:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:17,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:51:17,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395950374] [2020-11-29 19:51:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:17,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:51:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:51:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608353324] [2020-11-29 19:51:17,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:51:17,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395950374] [2020-11-29 19:51:17,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:51:17,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-29 19:51:17,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037928127] [2020-11-29 19:51:17,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:51:17,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:51:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:51:17,295 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-11-29 19:51:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:17,362 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-11-29 19:51:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:51:17,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-29 19:51:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:17,365 INFO L225 Difference]: With dead ends: 34 [2020-11-29 19:51:17,366 INFO L226 Difference]: Without dead ends: 28 [2020-11-29 19:51:17,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:51:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-29 19:51:17,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-29 19:51:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:51:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-11-29 19:51:17,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2020-11-29 19:51:17,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:17,374 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-11-29 19:51:17,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:51:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-11-29 19:51:17,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 19:51:17,375 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:17,376 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:17,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:17,588 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:17,588 INFO L82 PathProgramCache]: Analyzing trace with hash -683493948, now seen corresponding path program 2 times [2020-11-29 19:51:17,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:17,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48608933] [2020-11-29 19:51:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:17,608 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:51:17,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900596360] [2020-11-29 19:51:17,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:17,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:51:17,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 19:51:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:51:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:51:17,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48608933] [2020-11-29 19:51:17,756 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:51:17,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900596360] [2020-11-29 19:51:17,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:51:17,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 19:51:17,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383738423] [2020-11-29 19:51:17,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 19:51:17,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:17,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 19:51:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 19:51:17,759 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-11-29 19:51:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:17,822 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-29 19:51:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 19:51:17,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 19:51:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:17,825 INFO L225 Difference]: With dead ends: 38 [2020-11-29 19:51:17,825 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 19:51:17,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:51:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 19:51:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 19:51:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 19:51:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-29 19:51:17,832 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 16 [2020-11-29 19:51:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:17,832 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-29 19:51:17,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 19:51:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-29 19:51:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:51:17,834 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:17,834 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:18,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:18,042 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:18,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:18,042 INFO L82 PathProgramCache]: Analyzing trace with hash 253246609, now seen corresponding path program 1 times [2020-11-29 19:51:18,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:18,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386875942] [2020-11-29 19:51:18,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:18,060 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:51:18,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587431149] [2020-11-29 19:51:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 19:51:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:18,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 19:51:18,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:51:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:51:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386875942] [2020-11-29 19:51:18,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:51:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587431149] [2020-11-29 19:51:18,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:51:18,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 19:51:18,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725296974] [2020-11-29 19:51:18,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 19:51:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:51:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:51:18,347 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 8 states. [2020-11-29 19:51:18,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:18,587 INFO L93 Difference]: Finished difference Result 28 states and 27 transitions. [2020-11-29 19:51:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:51:18,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-29 19:51:18,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:18,589 INFO L225 Difference]: With dead ends: 28 [2020-11-29 19:51:18,589 INFO L226 Difference]: Without dead ends: 22 [2020-11-29 19:51:18,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-29 19:51:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-29 19:51:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-29 19:51:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 19:51:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 21 transitions. [2020-11-29 19:51:18,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 21 transitions. Word has length 17 [2020-11-29 19:51:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:18,601 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 21 transitions. [2020-11-29 19:51:18,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 19:51:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 21 transitions. [2020-11-29 19:51:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:51:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:18,603 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:18,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 19:51:18,804 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash 286481449, now seen corresponding path program 1 times [2020-11-29 19:51:18,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:18,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717452361] [2020-11-29 19:51:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:18,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:51:18,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663388061] [2020-11-29 19:51:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:51:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 19:51:18,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:51:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:51:19,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717452361] [2020-11-29 19:51:19,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 19:51:19,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663388061] [2020-11-29 19:51:19,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 19:51:19,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 19:51:19,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234032641] [2020-11-29 19:51:19,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 19:51:19,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:51:19,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 19:51:19,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 19:51:19,116 INFO L87 Difference]: Start difference. First operand 22 states and 21 transitions. Second operand 7 states. [2020-11-29 19:51:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:51:19,290 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-11-29 19:51:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:51:19,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-11-29 19:51:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:51:19,292 INFO L225 Difference]: With dead ends: 22 [2020-11-29 19:51:19,292 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 19:51:19,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-29 19:51:19,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 19:51:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-29 19:51:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 19:51:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2020-11-29 19:51:19,300 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 17 [2020-11-29 19:51:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:51:19,301 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2020-11-29 19:51:19,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 19:51:19,301 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2020-11-29 19:51:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 19:51:19,302 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:51:19,302 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:51:19,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:19,503 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:51:19,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:51:19,503 INFO L82 PathProgramCache]: Analyzing trace with hash 430952748, now seen corresponding path program 2 times [2020-11-29 19:51:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:51:19,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749806913] [2020-11-29 19:51:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:51:19,515 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:51:19,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152786509] [2020-11-29 19:51:19,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:19,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 19:51:19,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-29 19:51:19,579 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:51:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:51:19,798 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:51:19,839 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:51:19,844 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:51:20,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:51:20,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:51:20 BoogieIcfgContainer [2020-11-29 19:51:20,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:51:20,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:51:20,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:51:20,098 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:51:20,099 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:51:13" (3/4) ... [2020-11-29 19:51:20,101 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:51:20,210 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6d2a5e97-e8b2-4321-8ee3-974608a4145b/bin/uautomizer/witness.graphml [2020-11-29 19:51:20,214 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:51:20,216 INFO L168 Benchmark]: Toolchain (without parser) took 7611.83 ms. Allocated memory was 104.9 MB in the beginning and 136.3 MB in the end (delta: 31.5 MB). Free memory was 78.4 MB in the beginning and 66.0 MB in the end (delta: 12.4 MB). Peak memory consumption was 43.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:20,220 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 104.9 MB. Free memory is still 62.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:51:20,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.34 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 80.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:20,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.39 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 78.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:20,222 INFO L168 Benchmark]: Boogie Preprocessor took 58.16 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 77.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:51:20,222 INFO L168 Benchmark]: RCFGBuilder took 722.39 ms. Allocated memory is still 104.9 MB. Free memory was 77.6 MB in the beginning and 64.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:20,223 INFO L168 Benchmark]: TraceAbstraction took 6238.84 ms. Allocated memory was 104.9 MB in the beginning and 136.3 MB in the end (delta: 31.5 MB). Free memory was 64.4 MB in the beginning and 69.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:20,224 INFO L168 Benchmark]: Witness Printer took 117.93 ms. Allocated memory is still 136.3 MB. Free memory was 69.2 MB in the beginning and 66.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:51:20,228 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 104.9 MB. Free memory is still 62.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 401.34 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 80.3 MB in the end (delta: -2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.39 ms. Allocated memory is still 104.9 MB. Free memory was 80.3 MB in the beginning and 78.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.16 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 77.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 722.39 ms. Allocated memory is still 104.9 MB. Free memory was 77.6 MB in the beginning and 64.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6238.84 ms. Allocated memory was 104.9 MB in the beginning and 136.3 MB in the end (delta: 31.5 MB). Free memory was 64.4 MB in the beginning and 69.2 MB in the end (delta: -4.8 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. * Witness Printer took 117.93 ms. Allocated memory is still 136.3 MB. Free memory was 69.2 MB in the beginning and 66.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<2 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND FALSE !(counter++<2) [L10] COND FALSE !(!(cond)) VAL [counter=3] [L10] COND TRUE !(cond) VAL [counter=3] [L3] __assert_fail("0", "ps6-ll.c", 3, "reach_error") VAL [counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 67 SDslu, 176 SDs, 0 SdLazy, 161 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, 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, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 6516 SizeOfPredicates, 25 NumberOfNonLiveVariables, 495 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 8/27 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...