./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.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_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 16c3a7f72afea5c31f48392b3db26aa208b15a5c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:25:43,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:25:43,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:25:43,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:25:43,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:25:43,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:25:43,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:25:43,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:25:43,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:25:43,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:25:43,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:25:43,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:25:43,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:25:43,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:25:43,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:25:43,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:25:43,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:25:43,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:25:43,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:25:43,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:25:43,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:25:43,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:25:43,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:25:43,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:25:43,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:25:43,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:25:43,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:25:43,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:25:43,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:25:43,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:25:43,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:25:43,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:25:43,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:25:43,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:25:43,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:25:43,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:25:43,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:25:43,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:25:43,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:25:43,889 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:25:43,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:25:43,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:25:43,931 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:25:43,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:25:43,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:25:43,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:25:43,933 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:25:43,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:25:43,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:25:43,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:25:43,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:25:43,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:25:43,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:25:43,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:25:43,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:25:43,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:25:43,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:25:43,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:25:43,937 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:25:43,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:25:43,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:25:43,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:25:43,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:25:43,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:25:43,938 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:25:43,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:25:43,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:25:43,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:25:43,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:25:43,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:25:43,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:25:43,940 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_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16c3a7f72afea5c31f48392b3db26aa208b15a5c [2020-11-29 22:25:44,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:25:44,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:25:44,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:25:44,223 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:25:44,224 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:25:44,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2020-11-29 22:25:44,314 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/data/043a7f94b/7afd286e441c463f80f228d9f90c9d1f/FLAG8d5ebc092 [2020-11-29 22:25:44,751 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:25:44,752 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_valuebound10.c [2020-11-29 22:25:44,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/data/043a7f94b/7afd286e441c463f80f228d9f90c9d1f/FLAG8d5ebc092 [2020-11-29 22:25:44,790 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/data/043a7f94b/7afd286e441c463f80f228d9f90c9d1f [2020-11-29 22:25:44,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:25:44,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:25:44,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:25:44,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:25:44,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:25:44,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:25:44" (1/1) ... [2020-11-29 22:25:44,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533279ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:44, skipping insertion in model container [2020-11-29 22:25:44,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:25:44" (1/1) ... [2020-11-29 22:25:44,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:25:44,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:25:45,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:25:45,098 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:25:45,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:25:45,141 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:25:45,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45 WrapperNode [2020-11-29 22:25:45,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:25:45,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:25:45,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:25:45,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:25:45,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:25:45,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:25:45,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:25:45,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:25:45,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... [2020-11-29 22:25:45,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:25:45,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:25:45,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:25:45,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:25:45,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:25:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:25:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:25:45,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:25:45,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:25:45,610 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:25:45,611 INFO L298 CfgBuilder]: Removed 23 assume(true) statements. [2020-11-29 22:25:45,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:25:45 BoogieIcfgContainer [2020-11-29 22:25:45,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:25:45,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:25:45,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:25:45,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:25:45,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:25:44" (1/3) ... [2020-11-29 22:25:45,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ce6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:25:45, skipping insertion in model container [2020-11-29 22:25:45,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:25:45" (2/3) ... [2020-11-29 22:25:45,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ce6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:25:45, skipping insertion in model container [2020-11-29 22:25:45,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:25:45" (3/3) ... [2020-11-29 22:25:45,638 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound10.c [2020-11-29 22:25:45,654 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:25:45,658 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-29 22:25:45,671 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-29 22:25:45,703 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:25:45,703 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:25:45,703 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:25:45,703 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:25:45,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:25:45,704 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:25:45,704 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:25:45,704 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:25:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-29 22:25:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:25:45,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:25:45,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:25:45,733 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:25:45,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:25:45,739 INFO L82 PathProgramCache]: Analyzing trace with hash 330581779, now seen corresponding path program 1 times [2020-11-29 22:25:45,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:25:45,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772280169] [2020-11-29 22:25:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:25:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:25:45,941 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 22:25:45,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772280169] [2020-11-29 22:25:45,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:25:45,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:25:45,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078107471] [2020-11-29 22:25:45,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:25:45,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:25:45,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:25:45,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:25:45,967 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-11-29 22:25:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:25:45,988 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2020-11-29 22:25:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:25:45,990 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-29 22:25:45,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:25:46,000 INFO L225 Difference]: With dead ends: 53 [2020-11-29 22:25:46,001 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 22:25:46,007 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 22:25:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 22:25:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 22:25:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 22:25:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-29 22:25:46,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2020-11-29 22:25:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:25:46,047 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-29 22:25:46,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:25:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-29 22:25:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:25:46,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:25:46,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:25:46,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:25:46,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:25:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:25:46,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1507472743, now seen corresponding path program 1 times [2020-11-29 22:25:46,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:25:46,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373107749] [2020-11-29 22:25:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:25:46,074 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:25:46,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413665700] [2020-11-29 22:25:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:25:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:25:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:25:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:25:46,296 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 22:25:46,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373107749] [2020-11-29 22:25:46,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:25:46,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413665700] [2020-11-29 22:25:46,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:25:46,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:25:46,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16866812] [2020-11-29 22:25:46,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:25:46,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:25:46,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:25:46,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:25:46,301 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-11-29 22:25:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:25:46,421 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-11-29 22:25:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:25:46,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 22:25:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:25:46,423 INFO L225 Difference]: With dead ends: 41 [2020-11-29 22:25:46,423 INFO L226 Difference]: Without dead ends: 39 [2020-11-29 22:25:46,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 22:25:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-29 22:25:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2020-11-29 22:25:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 22:25:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-29 22:25:46,438 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2020-11-29 22:25:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:25:46,438 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-29 22:25:46,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:25:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-29 22:25:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:25:46,441 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:25:46,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:25:46,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 22:25:46,669 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:25:46,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:25:46,670 INFO L82 PathProgramCache]: Analyzing trace with hash -936562870, now seen corresponding path program 1 times [2020-11-29 22:25:46,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:25:46,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079872858] [2020-11-29 22:25:46,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:25:46,692 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:25:46,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947662671] [2020-11-29 22:25:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:25:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:25:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 22:25:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:25:46,783 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:25:46,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:25:46,843 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:25:46,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:25:46,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:25:55,276 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 22:25:55,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079872858] [2020-11-29 22:25:55,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:25:55,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947662671] [2020-11-29 22:25:55,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:25:55,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-29 22:25:55,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631399626] [2020-11-29 22:25:55,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:25:55,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:25:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:25:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=49, Unknown=4, NotChecked=0, Total=72 [2020-11-29 22:25:55,278 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 9 states. [2020-11-29 22:25:55,480 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-11-29 22:26:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:26:00,648 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-11-29 22:26:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:26:00,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-11-29 22:26:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:26:00,658 INFO L225 Difference]: With dead ends: 43 [2020-11-29 22:26:00,658 INFO L226 Difference]: Without dead ends: 35 [2020-11-29 22:26:00,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=79, Invalid=157, Unknown=4, NotChecked=0, Total=240 [2020-11-29 22:26:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-29 22:26:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-11-29 22:26:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-29 22:26:00,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-11-29 22:26:00,664 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2020-11-29 22:26:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:26:00,665 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-11-29 22:26:00,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:26:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-11-29 22:26:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 22:26:00,665 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:26:00,666 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:26:00,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:26:00,867 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:26:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:26:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1032624077, now seen corresponding path program 1 times [2020-11-29 22:26:00,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:26:00,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310809680] [2020-11-29 22:26:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:26:00,878 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:26:00,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888761239] [2020-11-29 22:26:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:26:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:26:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-29 22:26:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:26:01,006 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:26:01,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:01,354 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2020-11-29 22:26:01,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:01,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:01,602 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 1 [2020-11-29 22:26:01,818 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 15 [2020-11-29 22:26:01,856 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 22:26:01,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310809680] [2020-11-29 22:26:01,856 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:26:01,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888761239] [2020-11-29 22:26:01,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:26:01,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 22:26:01,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635081354] [2020-11-29 22:26:01,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:26:01,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:26:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:26:01,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:26:01,858 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 8 states. [2020-11-29 22:26:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:26:02,356 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2020-11-29 22:26:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:26:02,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-29 22:26:02,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:26:02,358 INFO L225 Difference]: With dead ends: 53 [2020-11-29 22:26:02,358 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 22:26:02,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:26:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 22:26:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2020-11-29 22:26:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 22:26:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-11-29 22:26:02,374 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 15 [2020-11-29 22:26:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:26:02,374 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-11-29 22:26:02,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:26:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-11-29 22:26:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 22:26:02,375 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:26:02,376 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:26:02,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:26:02,589 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:26:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:26:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1949134433, now seen corresponding path program 1 times [2020-11-29 22:26:02,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:26:02,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211529451] [2020-11-29 22:26:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:26:02,603 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:26:02,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482470429] [2020-11-29 22:26:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:26:02,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:26:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 22:26:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:26:02,696 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:26:02,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:05,112 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 27 DAG size of output: 18 [2020-11-29 22:26:05,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:05,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:26:05,431 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 22:26:05,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211529451] [2020-11-29 22:26:05,431 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:26:05,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482470429] [2020-11-29 22:26:05,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:26:05,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 22:26:05,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223410033] [2020-11-29 22:26:05,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:26:05,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:26:05,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:26:05,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:26:05,434 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand 9 states. [2020-11-29 22:26:13,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:26:13,275 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-11-29 22:26:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:26:13,281 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-11-29 22:26:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:26:13,282 INFO L225 Difference]: With dead ends: 61 [2020-11-29 22:26:13,282 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 22:26:13,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:26:13,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 22:26:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-11-29 22:26:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 22:26:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-11-29 22:26:13,292 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 16 [2020-11-29 22:26:13,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:26:13,293 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-11-29 22:26:13,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:26:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-11-29 22:26:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:26:13,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:26:13,294 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:26:13,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:26:13,510 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:26:13,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:26:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 296333352, now seen corresponding path program 1 times [2020-11-29 22:26:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:26:13,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581392166] [2020-11-29 22:26:13,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:26:13,535 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:26:13,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905761575] [2020-11-29 22:26:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:26:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:26:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 22:26:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:26:13,605 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:26:13,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:13,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:13,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:26:13,930 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 22:26:13,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581392166] [2020-11-29 22:26:13,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:26:13,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905761575] [2020-11-29 22:26:13,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:26:13,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-29 22:26:13,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825560513] [2020-11-29 22:26:13,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:26:13,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:26:13,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:26:13,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:26:13,933 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 9 states. [2020-11-29 22:26:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:26:14,351 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-11-29 22:26:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:26:14,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-11-29 22:26:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:26:14,355 INFO L225 Difference]: With dead ends: 74 [2020-11-29 22:26:14,355 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 22:26:14,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:26:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 22:26:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-11-29 22:26:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 22:26:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2020-11-29 22:26:14,365 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 17 [2020-11-29 22:26:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:26:14,365 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-11-29 22:26:14,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:26:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2020-11-29 22:26:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:26:14,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:26:14,366 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:26:14,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-29 22:26:14,573 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:26:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:26:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash 296392934, now seen corresponding path program 1 times [2020-11-29 22:26:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:26:14,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106999511] [2020-11-29 22:26:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:26:14,586 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:26:14,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458827126] [2020-11-29 22:26:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:26:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:26:14,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-29 22:26:14,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:26:14,739 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:26:14,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:14,788 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:26:14,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:15,063 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-11-29 22:26:15,373 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2020-11-29 22:26:15,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:15,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:15,578 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 22:26:15,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106999511] [2020-11-29 22:26:15,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:26:15,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458827126] [2020-11-29 22:26:15,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:26:15,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 22:26:15,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319963306] [2020-11-29 22:26:15,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:26:15,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:26:15,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:26:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:26:15,581 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 12 states. [2020-11-29 22:26:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:26:16,589 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2020-11-29 22:26:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:26:16,591 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-11-29 22:26:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:26:16,592 INFO L225 Difference]: With dead ends: 77 [2020-11-29 22:26:16,592 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 22:26:16,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:26:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 22:26:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2020-11-29 22:26:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 22:26:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2020-11-29 22:26:16,609 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 17 [2020-11-29 22:26:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:26:16,609 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2020-11-29 22:26:16,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:26:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2020-11-29 22:26:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:26:16,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:26:16,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:26:16,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:26:16,825 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:26:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:26:16,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1940986474, now seen corresponding path program 1 times [2020-11-29 22:26:16,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:26:16,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572265951] [2020-11-29 22:26:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:26:16,838 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:26:16,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360859812] [2020-11-29 22:26:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/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 22:26:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:26:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:26:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:26:16,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:16,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:26:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:26:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572265951] [2020-11-29 22:26:16,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:26:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360859812] [2020-11-29 22:26:16,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:26:16,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:26:16,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473106564] [2020-11-29 22:26:16,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:26:16,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:26:16,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:26:16,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:26:16,933 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand 3 states. [2020-11-29 22:26:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:26:16,994 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-11-29 22:26:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:26:16,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-29 22:26:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:26:16,996 INFO L225 Difference]: With dead ends: 65 [2020-11-29 22:26:16,996 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 22:26:16,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:26:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 22:26:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-11-29 22:26:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 22:26:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-11-29 22:26:17,006 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 18 [2020-11-29 22:26:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:26:17,007 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-11-29 22:26:17,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:26:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-11-29 22:26:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 22:26:17,008 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:26:17,008 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:26:17,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:26:17,233 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:26:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:26:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash -39736575, now seen corresponding path program 2 times [2020-11-29 22:26:17,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:26:17,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664193839] [2020-11-29 22:26:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:26:17,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:26:17,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33004965] [2020-11-29 22:26:17,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:26:17,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:26:17,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:26:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 22:26:17,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:26:17,505 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:26:17,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:19,619 WARN L193 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-11-29 22:26:19,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:20,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:26:20,198 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 22:26:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664193839] [2020-11-29 22:26:20,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:26:20,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33004965] [2020-11-29 22:26:20,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:26:20,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-29 22:26:20,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957984968] [2020-11-29 22:26:20,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:26:20,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:26:20,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:26:20,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:26:20,200 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 8 states. [2020-11-29 22:26:32,695 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-11-29 22:26:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:26:59,756 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2020-11-29 22:26:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:26:59,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-29 22:26:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:26:59,766 INFO L225 Difference]: With dead ends: 82 [2020-11-29 22:26:59,766 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 22:26:59,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=43, Invalid=108, Unknown=5, NotChecked=0, Total=156 [2020-11-29 22:26:59,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 22:26:59,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2020-11-29 22:26:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 22:26:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-11-29 22:26:59,776 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 19 [2020-11-29 22:26:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:26:59,777 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-11-29 22:26:59,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:26:59,777 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-11-29 22:26:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:26:59,778 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:26:59,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:27:00,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 22:27:00,003 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:27:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:27:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1914973019, now seen corresponding path program 1 times [2020-11-29 22:27:00,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:27:00,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671530954] [2020-11-29 22:27:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:27:00,015 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:27:00,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874357060] [2020-11-29 22:27:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:27:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:27:00,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-29 22:27:00,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:27:00,099 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:27:00,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:27:00,186 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:27:00,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:27:03,685 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-11-29 22:27:07,262 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-11-29 22:27:07,264 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:27:07,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:27:12,330 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification that was a NOOP. DAG size: 31 [2020-11-29 22:27:12,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-11-29 22:27:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:27:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671530954] [2020-11-29 22:27:12,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:27:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874357060] [2020-11-29 22:27:12,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:27:12,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-29 22:27:12,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118203103] [2020-11-29 22:27:12,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 22:27:12,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:27:12,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 22:27:12,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=117, Unknown=3, NotChecked=0, Total=156 [2020-11-29 22:27:12,626 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 13 states. [2020-11-29 22:27:17,215 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2020-11-29 22:27:28,465 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-11-29 22:27:54,078 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 32 [2020-11-29 22:28:01,164 WARN L193 SmtUtils]: Spent 3.06 s on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-11-29 22:28:10,507 WARN L193 SmtUtils]: Spent 7.91 s on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-11-29 22:28:19,081 WARN L193 SmtUtils]: Spent 8.04 s on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-11-29 22:28:20,558 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-11-29 22:28:44,192 WARN L193 SmtUtils]: Spent 16.20 s on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-11-29 22:28:53,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:28:53,851 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-11-29 22:28:53,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:28:53,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-11-29 22:28:53,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:28:53,857 INFO L225 Difference]: With dead ends: 67 [2020-11-29 22:28:53,857 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 22:28:53,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 63.9s TimeCoverageRelationStatistics Valid=141, Invalid=359, Unknown=6, NotChecked=0, Total=506 [2020-11-29 22:28:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 22:28:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-11-29 22:28:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 22:28:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2020-11-29 22:28:53,869 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 20 [2020-11-29 22:28:53,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:28:53,869 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-11-29 22:28:53,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 22:28:53,869 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2020-11-29 22:28:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:28:53,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:28:53,870 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:28:54,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:28:54,085 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:28:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:28:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash -604986915, now seen corresponding path program 1 times [2020-11-29 22:28:54,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:28:54,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797956408] [2020-11-29 22:28:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:28:54,096 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:28:54,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594312364] [2020-11-29 22:28:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:28:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:28:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 22:28:54,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:28:54,198 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:28:54,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:28:54,254 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:28:54,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:28:55,538 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-29 22:28:55,539 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:28:55,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:28:56,256 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-11-29 22:28:56,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 22:29:23,399 WARN L193 SmtUtils]: Spent 12.63 s on a formula simplification. DAG size of input: 33 DAG size of output: 12 [2020-11-29 22:29:23,436 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 22:29:23,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797956408] [2020-11-29 22:29:23,437 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:29:23,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594312364] [2020-11-29 22:29:23,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:29:23,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-11-29 22:29:23,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244894833] [2020-11-29 22:29:23,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:29:23,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:29:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:29:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=129, Unknown=7, NotChecked=0, Total=182 [2020-11-29 22:29:23,438 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 14 states. [2020-11-29 22:29:24,201 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2020-11-29 22:29:24,571 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2020-11-29 22:29:25,481 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2020-11-29 22:29:30,592 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2020-11-29 22:29:32,497 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-11-29 22:29:42,749 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-11-29 22:29:43,896 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2020-11-29 22:29:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:29:47,599 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2020-11-29 22:29:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:29:47,613 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-11-29 22:29:47,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:29:47,614 INFO L225 Difference]: With dead ends: 70 [2020-11-29 22:29:47,615 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 22:29:47,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=170, Invalid=375, Unknown=7, NotChecked=0, Total=552 [2020-11-29 22:29:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 22:29:47,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-11-29 22:29:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 22:29:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-11-29 22:29:47,627 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 20 [2020-11-29 22:29:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:29:47,627 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-11-29 22:29:47,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:29:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-11-29 22:29:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:29:47,629 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:29:47,629 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:29:47,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:29:47,852 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:29:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:29:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1869213622, now seen corresponding path program 1 times [2020-11-29 22:29:47,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:29:47,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038914841] [2020-11-29 22:29:47,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:29:47,862 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:29:47,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214282538] [2020-11-29 22:29:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:29:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:29:47,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:29:47,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:29:50,878 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-11-29 22:29:50,880 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 2, 2, 1] term [2020-11-29 22:29:50,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:29:52,649 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 21 [2020-11-29 22:29:52,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:29:52,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:29:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 22:29:52,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038914841] [2020-11-29 22:29:52,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:29:52,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214282538] [2020-11-29 22:29:52,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:29:52,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 22:29:52,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270868437] [2020-11-29 22:29:52,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:29:52,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:29:52,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:29:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:29:52,884 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 8 states. [2020-11-29 22:30:00,815 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-11-29 22:30:14,704 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2020-11-29 22:30:16,019 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 15 [2020-11-29 22:30:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:30:16,288 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2020-11-29 22:30:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:30:16,292 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-29 22:30:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:30:16,292 INFO L225 Difference]: With dead ends: 71 [2020-11-29 22:30:16,293 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 22:30:16,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:30:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 22:30:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-11-29 22:30:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 22:30:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-11-29 22:30:16,307 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 23 [2020-11-29 22:30:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:30:16,307 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-11-29 22:30:16,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:30:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-11-29 22:30:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:30:16,309 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:30:16,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:30:16,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 22:30:16,525 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:30:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:30:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1006565543, now seen corresponding path program 1 times [2020-11-29 22:30:16,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:30:16,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580298283] [2020-11-29 22:30:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:30:16,535 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:30:16,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191632143] [2020-11-29 22:30:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:30:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:30:16,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:30:16,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:30:16,796 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2020-11-29 22:30:27,919 WARN L193 SmtUtils]: Spent 9.58 s on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-11-29 22:30:27,921 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 2, 2, 1] term [2020-11-29 22:30:27,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:30:30,489 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 24 [2020-11-29 22:30:30,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:30:30,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:30:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 22:30:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580298283] [2020-11-29 22:30:30,781 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:30:30,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191632143] [2020-11-29 22:30:30,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:30:30,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 22:30:30,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269548557] [2020-11-29 22:30:30,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:30:30,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:30:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:30:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:30:30,782 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 8 states. [2020-11-29 22:30:36,530 WARN L193 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-11-29 22:30:44,168 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 31 DAG size of output: 16 [2020-11-29 22:30:46,985 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2020-11-29 22:30:47,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:30:47,035 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2020-11-29 22:30:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:30:47,038 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-11-29 22:30:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:30:47,040 INFO L225 Difference]: With dead ends: 109 [2020-11-29 22:30:47,040 INFO L226 Difference]: Without dead ends: 87 [2020-11-29 22:30:47,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:30:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-29 22:30:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2020-11-29 22:30:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 22:30:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-11-29 22:30:47,053 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 24 [2020-11-29 22:30:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:30:47,054 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-11-29 22:30:47,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:30:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-11-29 22:30:47,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:30:47,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:30:47,055 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:30:47,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 22:30:47,265 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:30:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:30:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1513394391, now seen corresponding path program 1 times [2020-11-29 22:30:47,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:30:47,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311109977] [2020-11-29 22:30:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:30:47,275 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:30:47,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970172489] [2020-11-29 22:30:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:30:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:30:47,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 22:30:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:30:47,399 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:30:47,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:30:47,472 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:30:47,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:30:47,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:30:47,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:30:47,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:30:47,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:30:47,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:30:47,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:30:47,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:30:47,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:30:47,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:30:47,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:47,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:30:51,537 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 133 DAG size of output: 42 [2020-11-29 22:30:51,927 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-29 22:30:51,932 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-11-29 22:30:51,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:01,474 WARN L193 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-11-29 22:31:01,479 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 9, 1] term [2020-11-29 22:31:01,480 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 22:31:07,651 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 77 [2020-11-29 22:31:07,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:07,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:31:09,965 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-11-29 22:31:09,970 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-11-29 22:31:09,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:31:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:31:10,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311109977] [2020-11-29 22:31:10,237 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:31:10,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970172489] [2020-11-29 22:31:10,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:31:10,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-29 22:31:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678101088] [2020-11-29 22:31:10,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 22:31:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:31:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 22:31:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=156, Unknown=1, NotChecked=0, Total=210 [2020-11-29 22:31:10,238 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 15 states. [2020-11-29 22:31:14,230 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 93 DAG size of output: 28 [2020-11-29 22:31:23,133 WARN L193 SmtUtils]: Spent 5.53 s on a formula simplification. DAG size of input: 100 DAG size of output: 32 [2020-11-29 22:31:31,012 WARN L193 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 101 DAG size of output: 30 [2020-11-29 22:31:42,480 WARN L193 SmtUtils]: Spent 9.51 s on a formula simplification. DAG size of input: 110 DAG size of output: 40 [2020-11-29 22:31:47,852 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-11-29 22:32:01,783 WARN L193 SmtUtils]: Spent 12.23 s on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-11-29 22:32:07,178 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-11-29 22:32:18,113 WARN L193 SmtUtils]: Spent 8.32 s on a formula simplification. DAG size of input: 108 DAG size of output: 49 [2020-11-29 22:32:24,747 WARN L193 SmtUtils]: Spent 5.27 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-11-29 22:32:33,624 WARN L193 SmtUtils]: Spent 5.14 s on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-11-29 22:32:41,670 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 108 DAG size of output: 55 [2020-11-29 22:32:49,010 WARN L193 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 107 DAG size of output: 57 [2020-11-29 22:32:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:32:49,220 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-11-29 22:32:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 22:32:49,227 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-11-29 22:32:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:32:49,228 INFO L225 Difference]: With dead ends: 104 [2020-11-29 22:32:49,228 INFO L226 Difference]: Without dead ends: 102 [2020-11-29 22:32:49,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 98.2s TimeCoverageRelationStatistics Valid=257, Invalid=612, Unknown=1, NotChecked=0, Total=870 [2020-11-29 22:32:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-29 22:32:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2020-11-29 22:32:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 22:32:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-11-29 22:32:49,246 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 24 [2020-11-29 22:32:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:32:49,246 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-11-29 22:32:49,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 22:32:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-11-29 22:32:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 22:32:49,247 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:32:49,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:32:49,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 22:32:49,472 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:32:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:32:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1018149145, now seen corresponding path program 1 times [2020-11-29 22:32:49,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:32:49,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850096034] [2020-11-29 22:32:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:32:49,480 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:32:49,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906835292] [2020-11-29 22:32:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:32:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:32:49,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:32:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:32:49,585 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 22:32:49,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:32:49,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:32:49,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:32:49,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:32:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 22:32:49,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850096034] [2020-11-29 22:32:49,798 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:32:49,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906835292] [2020-11-29 22:32:49,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:32:49,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 22:32:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82104791] [2020-11-29 22:32:49,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:32:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:32:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:32:49,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:32:49,800 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 8 states. [2020-11-29 22:32:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:32:50,368 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2020-11-29 22:32:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:32:50,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-11-29 22:32:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:32:50,372 INFO L225 Difference]: With dead ends: 77 [2020-11-29 22:32:50,372 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 22:32:50,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:32:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 22:32:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-11-29 22:32:50,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 22:32:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2020-11-29 22:32:50,387 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 25 [2020-11-29 22:32:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:32:50,387 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2020-11-29 22:32:50,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:32:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2020-11-29 22:32:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 22:32:50,388 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:32:50,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:32:50,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:32:50,617 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:32:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:32:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2110734571, now seen corresponding path program 1 times [2020-11-29 22:32:50,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:32:50,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363581918] [2020-11-29 22:32:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:32:50,625 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:32:50,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659740731] [2020-11-29 22:32:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:32:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:32:50,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:32:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:32:50,896 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2020-11-29 22:32:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:32:51,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363581918] [2020-11-29 22:32:51,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:32:51,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659740731] [2020-11-29 22:32:51,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:32:51,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:32:51,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472864846] [2020-11-29 22:32:51,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:32:51,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:32:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:32:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:32:51,058 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 4 states. [2020-11-29 22:32:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:32:51,379 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2020-11-29 22:32:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:32:51,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 22:32:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:32:51,387 INFO L225 Difference]: With dead ends: 91 [2020-11-29 22:32:51,387 INFO L226 Difference]: Without dead ends: 65 [2020-11-29 22:32:51,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:32:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-29 22:32:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-11-29 22:32:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 22:32:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-11-29 22:32:51,399 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 25 [2020-11-29 22:32:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:32:51,400 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-11-29 22:32:51,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:32:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-11-29 22:32:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:32:51,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:32:51,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:32:51,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 22:32:51,605 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:32:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:32:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash 942033354, now seen corresponding path program 1 times [2020-11-29 22:32:51,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:32:51,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166291435] [2020-11-29 22:32:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:32:51,626 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:32:51,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979034550] [2020-11-29 22:32:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:32:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:32:51,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 22:32:51,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:32:51,704 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:32:51,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:32:51,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:32:51,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:32:51,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:32:52,203 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2020-11-29 22:32:52,542 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2020-11-29 22:32:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 22:32:52,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166291435] [2020-11-29 22:32:52,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:32:52,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979034550] [2020-11-29 22:32:52,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:32:52,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-29 22:32:52,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216837874] [2020-11-29 22:32:52,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:32:52,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:32:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:32:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:32:52,599 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 9 states. [2020-11-29 22:32:53,596 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-29 22:32:53,894 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-11-29 22:32:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:32:54,329 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-11-29 22:32:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:32:54,332 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-11-29 22:32:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:32:54,332 INFO L225 Difference]: With dead ends: 75 [2020-11-29 22:32:54,332 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 22:32:54,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:32:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 22:32:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-11-29 22:32:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 22:32:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-11-29 22:32:54,345 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 26 [2020-11-29 22:32:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:32:54,346 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-11-29 22:32:54,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:32:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-11-29 22:32:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:32:54,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:32:54,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:32:54,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 22:32:54,547 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:32:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:32:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1622091724, now seen corresponding path program 1 times [2020-11-29 22:32:54,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:32:54,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127646163] [2020-11-29 22:32:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:32:54,556 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:32:54,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322356007] [2020-11-29 22:32:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:32:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:32:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 22:32:54,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:32:54,672 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:32:54,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:32:54,760 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-11-29 22:32:54,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:32:54,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:32:54,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:32:54,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 22:32:54,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 22:32:54,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 22:32:54,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:32:54,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-11-29 22:32:54,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-11-29 22:32:57,822 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 174 DAG size of output: 40 [2020-11-29 22:32:59,313 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2020-11-29 22:32:59,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:32:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:32:59,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127646163] [2020-11-29 22:32:59,499 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:32:59,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322356007] [2020-11-29 22:32:59,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:32:59,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-29 22:32:59,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104760992] [2020-11-29 22:32:59,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:32:59,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:32:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:32:59,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:32:59,507 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 12 states. [2020-11-29 22:32:59,889 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 13 [2020-11-29 22:33:01,536 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 17 [2020-11-29 22:33:02,001 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 20 [2020-11-29 22:33:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:33:02,004 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-11-29 22:33:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:33:02,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-11-29 22:33:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:33:02,007 INFO L225 Difference]: With dead ends: 51 [2020-11-29 22:33:02,007 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 22:33:02,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:33:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 22:33:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-11-29 22:33:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 22:33:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-11-29 22:33:02,017 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2020-11-29 22:33:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:33:02,017 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-11-29 22:33:02,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:33:02,017 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-11-29 22:33:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:33:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:33:02,017 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:33:02,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 22:33:02,218 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:33:02,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:33:02,218 INFO L82 PathProgramCache]: Analyzing trace with hash -620458706, now seen corresponding path program 1 times [2020-11-29 22:33:02,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:33:02,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547240092] [2020-11-29 22:33:02,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:33:02,226 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:33:02,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040290457] [2020-11-29 22:33:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:33:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:33:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:33:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:33:02,534 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-11-29 22:33:02,952 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2020-11-29 22:33:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:33:02,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547240092] [2020-11-29 22:33:02,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:33:02,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040290457] [2020-11-29 22:33:02,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:33:02,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 22:33:02,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56704574] [2020-11-29 22:33:02,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:33:02,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:33:02,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:33:02,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:33:02,977 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 5 states. [2020-11-29 22:33:03,581 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 12 [2020-11-29 22:33:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:33:03,933 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-11-29 22:33:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:33:03,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-11-29 22:33:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:33:03,941 INFO L225 Difference]: With dead ends: 78 [2020-11-29 22:33:03,941 INFO L226 Difference]: Without dead ends: 56 [2020-11-29 22:33:03,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:33:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-29 22:33:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-11-29 22:33:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 22:33:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-11-29 22:33:03,952 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 26 [2020-11-29 22:33:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:33:03,952 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-11-29 22:33:03,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:33:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-11-29 22:33:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 22:33:03,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:33:03,953 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:33:04,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:33:04,172 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:33:04,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:33:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1067890293, now seen corresponding path program 2 times [2020-11-29 22:33:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:33:04,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797377496] [2020-11-29 22:33:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:33:04,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 22:33:04,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279223670] [2020-11-29 22:33:04,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:33:04,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-29 22:33:04,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:33:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:33:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:33:09,538 WARN L193 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-11-29 22:33:09,540 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 2, 3, 1] term [2020-11-29 22:33:09,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:33:12,222 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-29 22:33:12,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:33:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 22:33:12,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797377496] [2020-11-29 22:33:12,632 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 22:33:12,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279223670] [2020-11-29 22:33:12,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:33:12,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 22:33:12,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993597953] [2020-11-29 22:33:12,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:33:12,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:33:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:33:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:33:12,633 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 6 states. [2020-11-29 22:33:15,738 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-11-29 22:33:18,848 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2020-11-29 22:33:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:33:30,329 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-11-29 22:33:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:33:30,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-29 22:33:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:33:30,332 INFO L225 Difference]: With dead ends: 43 [2020-11-29 22:33:30,332 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 22:33:30,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:33:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 22:33:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 22:33:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 22:33:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:33:30,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-11-29 22:33:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:33:30,333 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:33:30,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:33:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:33:30,333 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 22:33:30,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:33:30,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 22:33:30,741 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 195 [2020-11-29 22:33:31,032 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 176 [2020-11-29 22:35:06,580 WARN L193 SmtUtils]: Spent 1.59 m on a formula simplification. DAG size of input: 200 DAG size of output: 37 [2020-11-29 22:35:22,043 WARN L193 SmtUtils]: Spent 15.46 s on a formula simplification. DAG size of input: 174 DAG size of output: 34 [2020-11-29 22:35:30,155 WARN L193 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 121 DAG size of output: 36 [2020-11-29 22:35:30,157 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point L44(lines 44 54) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point L40(lines 40 54) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2020-11-29 22:35:30,158 INFO L270 CegarLoopResult]: At program point L12-1(lines 37 38) the Hoare annotation is: (and (<= ULTIMATE.start_main_~b~0 10) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 10) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~x~0) (<= 0 ULTIMATE.start_main_~a~0) (<= 0 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (<= ULTIMATE.start_main_~x~0 10) (let ((.cse0 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (or (= ULTIMATE.start_main_~q~0 .cse0) (and (not (= ULTIMATE.start_main_~b~0 0)) (= (mod (+ (* ULTIMATE.start_main_~q~0 (- 1)) .cse0) (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) 0) (not (= ULTIMATE.start_main_~a~0 0)))))) [2020-11-29 22:35:30,158 INFO L274 CegarLoopResult]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L270 CegarLoopResult]: At program point L12-3(lines 11 17) the Hoare annotation is: (let ((.cse1 (<= ULTIMATE.start_main_~y~0 10)) (.cse3 (<= 0 ULTIMATE.start_main_~x~0)) (.cse4 (<= ULTIMATE.start_main_~x~0 10)) (.cse0 (<= 1 ULTIMATE.start_main_~y~0)) (.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse5 (= ULTIMATE.start_assume_abort_if_not_~cond 1))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 0 ULTIMATE.start_main_~a~0) .cse4 .cse5 (= ULTIMATE.start_main_~b~0 0)) (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~a~0 0) .cse4 .cse5 (<= 1 ULTIMATE.start_main_~b~0)) (let ((.cse6 (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0))) (and (= ULTIMATE.start_main_~q~0 .cse6) .cse0 (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~b~0) .cse2 (= ULTIMATE.start_main_~p~0 1) .cse5 (= .cse6 (+ ULTIMATE.start_main_~q~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0))))))) [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L12-4(lines 12 15) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L8-1(lines 8 10) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L277 CegarLoopResult]: At program point L12-5(lines 11 17) the Hoare annotation is: true [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L8-2(lines 8 10) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L13(lines 13 14) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2020-11-29 22:35:30,159 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-11-29 22:35:30,160 INFO L274 CegarLoopResult]: For program point L9-2(line 9) no Hoare annotation was computed. [2020-11-29 22:35:30,160 INFO L274 CegarLoopResult]: For program point L9-4(line 9) no Hoare annotation was computed. [2020-11-29 22:35:30,160 INFO L274 CegarLoopResult]: For program point L34-2(lines 34 55) no Hoare annotation was computed. [2020-11-29 22:35:30,160 INFO L277 CegarLoopResult]: At program point L59(lines 19 60) the Hoare annotation is: true [2020-11-29 22:35:30,160 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-29 22:35:30,160 INFO L274 CegarLoopResult]: For program point L47(lines 47 54) no Hoare annotation was computed. [2020-11-29 22:35:30,160 INFO L270 CegarLoopResult]: At program point L47-2(lines 34 55) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~y~0 10)) (.cse1 (<= 0 ULTIMATE.start_main_~a~0)) (.cse2 (<= ULTIMATE.start_main_~x~0 10)) (.cse3 (= ULTIMATE.start_assume_abort_if_not_~cond 1))) (or (and (<= ULTIMATE.start_main_~b~0 10) (<= 1 ULTIMATE.start_main_~y~0) .cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 0 ULTIMATE.start_main_~x~0) .cse1 (<= 0 ULTIMATE.start_main_~b~0) .cse2 .cse3) (and .cse0 (= (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~y~0) (+ (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~q~0)) (= ULTIMATE.start_main_~p~0 1) .cse1 (= ULTIMATE.start_main_~q~0 0) .cse2 .cse3 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= 1 ULTIMATE.start_main_~b~0)))) [2020-11-29 22:35:30,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:35:30 BoogieIcfgContainer [2020-11-29 22:35:30,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:35:30,180 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:35:30,180 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:35:30,181 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:35:30,181 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:25:45" (3/4) ... [2020-11-29 22:35:30,184 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 22:35:30,194 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-11-29 22:35:30,195 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 22:35:30,195 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:35:30,195 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:35:30,232 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a021eec1-42f2-4e69-a1e5-25b29f2767cb/bin/uautomizer/witness.graphml [2020-11-29 22:35:30,233 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:35:30,234 INFO L168 Benchmark]: Toolchain (without parser) took 585436.65 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 63.4 MB in the beginning and 75.3 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:30,234 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:35:30,234 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.25 ms. Allocated memory is still 100.7 MB. Free memory was 63.2 MB in the beginning and 75.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:30,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.81 ms. Allocated memory is still 100.7 MB. Free memory was 75.7 MB in the beginning and 74.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:30,235 INFO L168 Benchmark]: Boogie Preprocessor took 34.47 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 72.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:30,236 INFO L168 Benchmark]: RCFGBuilder took 378.99 ms. Allocated memory is still 100.7 MB. Free memory was 72.6 MB in the beginning and 57.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:30,236 INFO L168 Benchmark]: TraceAbstraction took 584550.99 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.3 MB in the beginning and 78.5 MB in the end (delta: -21.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:30,236 INFO L168 Benchmark]: Witness Printer took 52.35 ms. Allocated memory is still 121.6 MB. Free memory was 78.5 MB in the beginning and 75.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:35:30,239 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 341.25 ms. Allocated memory is still 100.7 MB. Free memory was 63.2 MB in the beginning and 75.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.81 ms. Allocated memory is still 100.7 MB. Free memory was 75.7 MB in the beginning and 74.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.47 ms. Allocated memory is still 100.7 MB. Free memory was 74.1 MB in the beginning and 72.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 378.99 ms. Allocated memory is still 100.7 MB. Free memory was 72.6 MB in the beginning and 57.6 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 584550.99 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.3 MB in the beginning and 78.5 MB in the end (delta: -21.2 MB). Peak memory consumption was 53.2 MB. Max. memory is 16.1 GB. * Witness Printer took 52.35 ms. Allocated memory is still 121.6 MB. Free memory was 78.5 MB in the beginning and 75.3 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: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((b <= 10 && 1 <= y) && y <= 10) && 1 == cond) && 0 <= x) && 0 <= a) && 0 <= b) && cond == 1) && x <= 10) && (q == x * y || ((!(b == 0) && (q * -1 + x * y) % (a * b) == 0) && !(a == 0))) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((b <= 10 && 1 <= y) && y <= 10) && 1 == cond) && 0 <= x) && 0 <= a) && 0 <= b) && x <= 10) && cond == 1) || ((((((((y <= 10 && x * y == a * p * b + q) && p == 1) && 0 <= a) && q == 0) && x <= 10) && cond == 1) && b == y) && 1 <= b) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((((((((1 <= y && y <= 10) && 1 == cond) && 0 <= x) && 0 <= a) && x <= 10) && cond == 1) && b == 0) || (((((((1 <= y && y <= 10) && 1 == cond) && 0 <= x) && a == 0) && x <= 10) && cond == 1) && 1 <= b)) || ((((((q == x * y && 1 <= y) && y <= b) && 1 == cond) && p == 1) && cond == 1) && x * y == q + a * b) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 464.8s, OverallIterations: 20, TraceHistogramMax: 4, AutomataDifference: 342.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 119.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 320 SDtfs, 978 SDslu, 795 SDs, 0 SdLazy, 1871 SolverSat, 367 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 162.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 480 GetRequests, 245 SyntacticMatches, 13 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 283.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 206 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 25 NumberOfFragments, 203 HoareAnnotationTreeSize, 5 FomulaSimplifications, 435419 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 5 FomulaSimplificationsInter, 19391 FormulaSimplificationTreeSizeReductionInter, 119.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 115.9s InterpolantComputationTime, 405 NumberOfCodeBlocks, 391 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 385 ConstructedInterpolants, 22 QuantifiedInterpolants, 122663 SizeOfPredicates, 191 NumberOfNonLiveVariables, 1819 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 20 InterpolantComputations, 9 PerfectInterpolantSequences, 82/129 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 correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...