./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/lcm2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/lcm2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9d162b857a109cf07f49ff5c5c478da80317c448 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 18:23:32,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 18:23:32,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 18:23:32,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 18:23:32,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 18:23:32,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 18:23:32,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 18:23:32,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 18:23:32,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 18:23:32,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 18:23:32,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 18:23:32,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 18:23:32,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 18:23:32,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 18:23:32,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 18:23:32,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 18:23:32,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 18:23:32,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 18:23:32,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 18:23:32,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 18:23:32,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 18:23:32,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 18:23:32,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 18:23:32,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 18:23:32,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 18:23:32,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 18:23:32,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 18:23:32,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 18:23:32,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 18:23:32,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 18:23:32,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 18:23:32,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 18:23:32,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 18:23:32,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 18:23:32,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 18:23:32,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 18:23:32,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 18:23:32,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 18:23:32,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 18:23:32,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 18:23:32,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 18:23:32,216 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 18:23:32,225 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 18:23:32,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 18:23:32,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 18:23:32,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 18:23:32,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 18:23:32,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 18:23:32,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 18:23:32,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 18:23:32,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 18:23:32,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 18:23:32,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 18:23:32,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 18:23:32,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 18:23:32,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 18:23:32,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 18:23:32,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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(__VERIFIER_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 -> 9d162b857a109cf07f49ff5c5c478da80317c448 [2019-12-07 18:23:32,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 18:23:32,340 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 18:23:32,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 18:23:32,344 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 18:23:32,344 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 18:23:32,345 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/../../sv-benchmarks/c/nla-digbench/lcm2.c [2019-12-07 18:23:32,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/data/65c76cbd0/784d5f88d7f94f47b446aae0134e621a/FLAG33fe2d36e [2019-12-07 18:23:32,734 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 18:23:32,734 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/sv-benchmarks/c/nla-digbench/lcm2.c [2019-12-07 18:23:32,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/data/65c76cbd0/784d5f88d7f94f47b446aae0134e621a/FLAG33fe2d36e [2019-12-07 18:23:32,746 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/data/65c76cbd0/784d5f88d7f94f47b446aae0134e621a [2019-12-07 18:23:32,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 18:23:32,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 18:23:32,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 18:23:32,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 18:23:32,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 18:23:32,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4de5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32, skipping insertion in model container [2019-12-07 18:23:32,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 18:23:32,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 18:23:32,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:23:32,871 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 18:23:32,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 18:23:32,923 INFO L208 MainTranslator]: Completed translation [2019-12-07 18:23:32,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32 WrapperNode [2019-12-07 18:23:32,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 18:23:32,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 18:23:32,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 18:23:32,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 18:23:32,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 18:23:32,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 18:23:32,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 18:23:32,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 18:23:32,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... [2019-12-07 18:23:32,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 18:23:32,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 18:23:32,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 18:23:32,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 18:23:32,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:32,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 18:23:32,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 18:23:32,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2019-12-07 18:23:33,107 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 18:23:33,108 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 18:23:33,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:23:33 BoogieIcfgContainer [2019-12-07 18:23:33,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 18:23:33,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 18:23:33,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 18:23:33,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 18:23:33,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 06:23:32" (1/3) ... [2019-12-07 18:23:33,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0481e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:23:33, skipping insertion in model container [2019-12-07 18:23:33,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 06:23:32" (2/3) ... [2019-12-07 18:23:33,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d0481e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 06:23:33, skipping insertion in model container [2019-12-07 18:23:33,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:23:33" (3/3) ... [2019-12-07 18:23:33,114 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-12-07 18:23:33,123 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 18:23:33,128 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-12-07 18:23:33,138 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-12-07 18:23:33,153 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 18:23:33,153 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 18:23:33,153 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 18:23:33,153 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 18:23:33,153 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 18:23:33,153 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 18:23:33,153 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 18:23:33,154 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 18:23:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-12-07 18:23:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 18:23:33,168 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:33,168 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 18:23:33,169 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-12-07 18:23:33,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:33,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584495416] [2019-12-07 18:23:33,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:33,242 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:33,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161308848] [2019-12-07 18:23:33,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:23:33,276 WARN L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-07 18:23:33,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:33,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:23:33,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584495416] [2019-12-07 18:23:33,329 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:33,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161308848] [2019-12-07 18:23:33,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 18:23:33,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 18:23:33,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269931626] [2019-12-07 18:23:33,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 18:23:33,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:33,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 18:23:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 18:23:33,343 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-12-07 18:23:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:33,403 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2019-12-07 18:23:33,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 18:23:33,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 18:23:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:33,413 INFO L225 Difference]: With dead ends: 40 [2019-12-07 18:23:33,413 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 18:23:33,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:23:33,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 18:23:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-12-07 18:23:33,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 18:23:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 18:23:33,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 4 [2019-12-07 18:23:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:33,437 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 18:23:33,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 18:23:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 18:23:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 18:23:33,438 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:33,438 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:23:33,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:33,640 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:33,641 INFO L82 PathProgramCache]: Analyzing trace with hash 759715009, now seen corresponding path program 1 times [2019-12-07 18:23:33,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:33,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443381635] [2019-12-07 18:23:33,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:33,677 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:33,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293008029] [2019-12-07 18:23:33,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:23:33,719 WARN L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 18:23:33,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:33,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:23:33,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443381635] [2019-12-07 18:23:33,872 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:33,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293008029] [2019-12-07 18:23:33,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:33,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-12-07 18:23:33,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733539318] [2019-12-07 18:23:33,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:23:33,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:33,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:23:33,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:23:33,874 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-12-07 18:23:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:33,974 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-12-07 18:23:33,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:23:33,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-07 18:23:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:33,975 INFO L225 Difference]: With dead ends: 26 [2019-12-07 18:23:33,975 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 18:23:33,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:23:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 18:23:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-12-07 18:23:33,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 18:23:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-12-07 18:23:33,979 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2019-12-07 18:23:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:33,980 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-12-07 18:23:33,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:23:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-12-07 18:23:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 18:23:33,980 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:33,980 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-12-07 18:23:34,181 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:34,182 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:34,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:34,183 INFO L82 PathProgramCache]: Analyzing trace with hash 759774591, now seen corresponding path program 1 times [2019-12-07 18:23:34,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:34,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87178545] [2019-12-07 18:23:34,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:34,208 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:34,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326936707] [2019-12-07 18:23:34,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:23:34,284 WARN L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 18:23:34,288 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:36,225 WARN L192 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2019-12-07 18:23:36,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:23:36,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87178545] [2019-12-07 18:23:36,310 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:36,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326936707] [2019-12-07 18:23:36,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:36,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-12-07 18:23:36,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066293532] [2019-12-07 18:23:36,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 18:23:36,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:36,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 18:23:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 18:23:36,312 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2019-12-07 18:23:36,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:36,446 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-12-07 18:23:36,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:23:36,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-12-07 18:23:36,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:36,447 INFO L225 Difference]: With dead ends: 29 [2019-12-07 18:23:36,447 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 18:23:36,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 18:23:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 18:23:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-12-07 18:23:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 18:23:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-12-07 18:23:36,451 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2019-12-07 18:23:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:36,452 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-12-07 18:23:36,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 18:23:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-12-07 18:23:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 18:23:36,452 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:36,452 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-12-07 18:23:36,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:36,653 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash -54520842, now seen corresponding path program 2 times [2019-12-07 18:23:36,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:36,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807163404] [2019-12-07 18:23:36,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:36,678 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:36,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785255617] [2019-12-07 18:23:36,679 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:36,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:23:36,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:23:36,748 WARN L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-07 18:23:36,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:36,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:23:36,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807163404] [2019-12-07 18:23:36,925 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:36,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785255617] [2019-12-07 18:23:36,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:36,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 18:23:36,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961472520] [2019-12-07 18:23:36,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:23:36,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:36,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:23:36,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:23:36,928 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2019-12-07 18:23:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:37,139 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-12-07 18:23:37,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:23:37,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 18:23:37,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:37,140 INFO L225 Difference]: With dead ends: 33 [2019-12-07 18:23:37,140 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 18:23:37,141 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:23:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 18:23:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-12-07 18:23:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:23:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 18:23:37,147 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-12-07 18:23:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:37,147 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 18:23:37,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:23:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 18:23:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 18:23:37,148 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:37,148 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 18:23:37,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:37,350 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash -54461260, now seen corresponding path program 1 times [2019-12-07 18:23:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:37,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452114939] [2019-12-07 18:23:37,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:37,379 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:37,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521188004] [2019-12-07 18:23:37,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 18:23:37,431 WARN L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 18:23:37,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:39,356 WARN L192 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2019-12-07 18:23:39,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:23:39,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452114939] [2019-12-07 18:23:39,443 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:39,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521188004] [2019-12-07 18:23:39,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:39,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 18:23:39,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234411085] [2019-12-07 18:23:39,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:23:39,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:39,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:23:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:23:39,445 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-12-07 18:23:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:39,689 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-12-07 18:23:39,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:23:39,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 18:23:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:39,690 INFO L225 Difference]: With dead ends: 33 [2019-12-07 18:23:39,690 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 18:23:39,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:23:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 18:23:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-12-07 18:23:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:23:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 18:23:39,695 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-12-07 18:23:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:39,695 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 18:23:39,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:23:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 18:23:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 18:23:39,696 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:39,696 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-12-07 18:23:39,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:39,898 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:39,899 INFO L82 PathProgramCache]: Analyzing trace with hash -863867468, now seen corresponding path program 2 times [2019-12-07 18:23:39,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:39,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700952577] [2019-12-07 18:23:39,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:39,918 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:39,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040092100] [2019-12-07 18:23:39,919 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:39,999 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:23:40,000 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:23:40,003 WARN L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-07 18:23:40,006 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:40,118 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:23:40,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700952577] [2019-12-07 18:23:40,128 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:40,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040092100] [2019-12-07 18:23:40,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:40,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 18:23:40,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129245226] [2019-12-07 18:23:40,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:23:40,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:40,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:23:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:23:40,130 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-12-07 18:23:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:40,278 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-12-07 18:23:40,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:23:40,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 18:23:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:40,279 INFO L225 Difference]: With dead ends: 37 [2019-12-07 18:23:40,279 INFO L226 Difference]: Without dead ends: 31 [2019-12-07 18:23:40,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:23:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-07 18:23:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-12-07 18:23:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:23:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-12-07 18:23:40,284 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2019-12-07 18:23:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:40,284 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-12-07 18:23:40,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:23:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-12-07 18:23:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 18:23:40,284 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:40,284 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-12-07 18:23:40,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:40,486 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:40,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash -863807886, now seen corresponding path program 2 times [2019-12-07 18:23:40,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:40,488 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139275127] [2019-12-07 18:23:40,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:40,505 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:40,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109015113] [2019-12-07 18:23:40,506 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:40,545 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 18:23:40,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:23:40,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-07 18:23:40,547 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:40,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 18:23:40,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139275127] [2019-12-07 18:23:40,582 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:40,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109015113] [2019-12-07 18:23:40,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:40,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-12-07 18:23:40,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837592065] [2019-12-07 18:23:40,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 18:23:40,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:40,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 18:23:40,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 18:23:40,583 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-12-07 18:23:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:40,674 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-12-07 18:23:40,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 18:23:40,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-12-07 18:23:40,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:40,674 INFO L225 Difference]: With dead ends: 38 [2019-12-07 18:23:40,675 INFO L226 Difference]: Without dead ends: 32 [2019-12-07 18:23:40,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-12-07 18:23:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-07 18:23:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-12-07 18:23:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 18:23:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-12-07 18:23:40,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-12-07 18:23:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:40,679 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-12-07 18:23:40,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 18:23:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-12-07 18:23:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:23:40,680 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:40,680 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1] [2019-12-07 18:23:40,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:40,881 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1087688533, now seen corresponding path program 3 times [2019-12-07 18:23:40,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:40,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92646621] [2019-12-07 18:23:40,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:40,890 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:40,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20191155] [2019-12-07 18:23:40,890 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:40,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 18:23:40,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:23:40,911 WARN L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-07 18:23:40,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:45,029 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-12-07 18:23:46,855 WARN L192 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2019-12-07 18:23:46,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:46,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:23:46,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92646621] [2019-12-07 18:23:46,953 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:46,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20191155] [2019-12-07 18:23:46,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:46,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 18:23:46,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911128514] [2019-12-07 18:23:46,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:23:46,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:23:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:23:46,954 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2019-12-07 18:23:47,206 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2019-12-07 18:23:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:47,329 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-12-07 18:23:47,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:23:47,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-12-07 18:23:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:47,330 INFO L225 Difference]: With dead ends: 41 [2019-12-07 18:23:47,330 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 18:23:47,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:23:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 18:23:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-12-07 18:23:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 18:23:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-12-07 18:23:47,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2019-12-07 18:23:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:47,338 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-12-07 18:23:47,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:23:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-12-07 18:23:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:23:47,339 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:47,339 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2019-12-07 18:23:47,539 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:47,541 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1087628951, now seen corresponding path program 3 times [2019-12-07 18:23:47,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:47,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020123975] [2019-12-07 18:23:47,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:47,560 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:47,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921329305] [2019-12-07 18:23:47,561 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:47,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 18:23:47,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:23:47,586 WARN L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 18:23:47,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:50,063 WARN L192 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 43 [2019-12-07 18:23:50,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-12-07 18:23:50,293 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-12-07 18:23:52,388 WARN L192 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2019-12-07 18:23:52,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 18:23:52,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020123975] [2019-12-07 18:23:52,407 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:23:52,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921329305] [2019-12-07 18:23:52,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:23:52,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 18:23:52,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722711162] [2019-12-07 18:23:52,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 18:23:52,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:23:52,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 18:23:52,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-07 18:23:52,408 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2019-12-07 18:23:54,588 WARN L192 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2019-12-07 18:23:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:23:54,727 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-12-07 18:23:54,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 18:23:54,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-12-07 18:23:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:23:54,728 INFO L225 Difference]: With dead ends: 44 [2019-12-07 18:23:54,728 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 18:23:54,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 18:23:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 18:23:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-12-07 18:23:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 18:23:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-12-07 18:23:54,736 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-12-07 18:23:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:23:54,736 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-12-07 18:23:54,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 18:23:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-12-07 18:23:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 18:23:54,737 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 18:23:54,737 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2019-12-07 18:23:54,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:23:54,937 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 18:23:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 18:23:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1897035159, now seen corresponding path program 4 times [2019-12-07 18:23:54,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 18:23:54,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655739802] [2019-12-07 18:23:54,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 18:23:54,943 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 18:23:54,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617928294] [2019-12-07 18:23:54,943 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/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 [2019-12-07 18:23:54,961 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 18:23:54,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 18:23:54,962 WARN L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 18:23:54,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 18:23:54,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:59,126 WARN L192 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2019-12-07 18:23:59,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:23:59,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 18:24:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 4 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 18:24:02,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655739802] [2019-12-07 18:24:02,253 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 18:24:02,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617928294] [2019-12-07 18:24:02,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-12-07 18:24:02,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-12-07 18:24:02,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699065352] [2019-12-07 18:24:02,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 18:24:02,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 18:24:02,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 18:24:02,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=25, Unknown=3, NotChecked=0, Total=42 [2019-12-07 18:24:02,254 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-12-07 18:24:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 18:24:02,287 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-12-07 18:24:02,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 18:24:02,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-12-07 18:24:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 18:24:02,288 INFO L225 Difference]: With dead ends: 26 [2019-12-07 18:24:02,288 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 18:24:02,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=21, Invalid=32, Unknown=3, NotChecked=0, Total=56 [2019-12-07 18:24:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 18:24:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 18:24:02,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 18:24:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 18:24:02,289 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-12-07 18:24:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 18:24:02,290 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 18:24:02,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 18:24:02,290 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 18:24:02,290 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 18:24:02,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 18:24:02,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 18:24:03,857 WARN L192 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 117 DAG size of output: 40 [2019-12-07 18:24:03,859 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 18:24:03,859 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-12-07 18:24:03,859 INFO L246 CegarLoopResult]: For program point L7(lines 7 10) no Hoare annotation was computed. [2019-12-07 18:24:03,859 INFO L242 CegarLoopResult]: At program point L7-2(lines 33 34) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~u~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~v~0)) (* (* ULTIMATE.start_main_~a~0 2) ULTIMATE.start_main_~b~0))) [2019-12-07 18:24:03,859 INFO L246 CegarLoopResult]: For program point L36(lines 36 42) no Hoare annotation was computed. [2019-12-07 18:24:03,859 INFO L246 CegarLoopResult]: For program point L7-3(lines 7 10) no Hoare annotation was computed. [2019-12-07 18:24:03,859 INFO L242 CegarLoopResult]: At program point L36-2(lines 30 43) the Hoare annotation is: (let ((.cse0 (= (+ (* ULTIMATE.start_main_~x~0 ULTIMATE.start_main_~u~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~v~0)) (* (* ULTIMATE.start_main_~a~0 2) ULTIMATE.start_main_~b~0)))) (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0) (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~u~0) (exists ((|v_ULTIMATE.start_main_#t~ret0_8| Int)) (let ((.cse1 (mod |v_ULTIMATE.start_main_#t~ret0_8| 4294967296))) (and (= .cse1 ULTIMATE.start_main_~a~0) (<= .cse1 2147483647)))) (<= 1 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) (<= 1 ULTIMATE.start_main_~b~0) .cse0 (exists ((|v_ULTIMATE.start_main_#t~ret1_9| Int)) (let ((.cse2 (mod |v_ULTIMATE.start_main_#t~ret1_9| 4294967296))) (and (<= .cse2 2147483647) (= ULTIMATE.start_main_~b~0 .cse2)))) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~v~0)))) [2019-12-07 18:24:03,859 INFO L249 CegarLoopResult]: At program point L7-5(lines 6 12) the Hoare annotation is: true [2019-12-07 18:24:03,860 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 18:24:03,860 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 18:24:03,860 INFO L246 CegarLoopResult]: For program point L30-2(lines 30 43) no Hoare annotation was computed. [2019-12-07 18:24:03,860 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-12-07 18:24:03,860 INFO L249 CegarLoopResult]: At program point L49(lines 14 50) the Hoare annotation is: true [2019-12-07 18:24:03,860 INFO L246 CegarLoopResult]: For program point L8(lines 8 9) no Hoare annotation was computed. [2019-12-07 18:24:03,860 INFO L246 CegarLoopResult]: For program point L8-1(lines 8 9) no Hoare annotation was computed. [2019-12-07 18:24:03,871 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,872 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,872 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-12-07 18:24:03,873 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-12-07 18:24:03,874 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,874 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,874 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-12-07 18:24:03,874 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-12-07 18:24:03,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 06:24:03 BoogieIcfgContainer [2019-12-07 18:24:03,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 18:24:03,877 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 18:24:03,877 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 18:24:03,877 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 18:24:03,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 06:23:33" (3/4) ... [2019-12-07 18:24:03,880 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 18:24:03,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 18:24:03,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 18:24:03,905 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (1 == cond && x * u + y * v == a * 2 * b) || (((((((b == u && (\exists v_ULTIMATE.start_main_#t~ret0_8 : int :: v_ULTIMATE.start_main_#t~ret0_8 % 4294967296 == a && v_ULTIMATE.start_main_#t~ret0_8 % 4294967296 <= 2147483647)) && 1 <= a) && a == x) && 1 <= b) && x * u + y * v == a * 2 * b) && (\exists v_ULTIMATE.start_main_#t~ret1_9 : int :: v_ULTIMATE.start_main_#t~ret1_9 % 4294967296 <= 2147483647 && b == v_ULTIMATE.start_main_#t~ret1_9 % 4294967296)) && a == v) [2019-12-07 18:24:03,917 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6a16aefc-36b8-40cc-a87d-dd6b213011ff/bin/uautomizer/witness.graphml [2019-12-07 18:24:03,917 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 18:24:03,918 INFO L168 Benchmark]: Toolchain (without parser) took 31168.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 942.4 MB in the beginning and 1.0 GB in the end (delta: -73.2 MB). Peak memory consumption was 56.3 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:03,918 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:24:03,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.6 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:03,918 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.25 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 18:24:03,919 INFO L168 Benchmark]: Boogie Preprocessor took 12.80 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:03,919 INFO L168 Benchmark]: RCFGBuilder took 150.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:03,919 INFO L168 Benchmark]: TraceAbstraction took 30767.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 30.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.3 MB). Peak memory consumption was 84.2 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:03,919 INFO L168 Benchmark]: Witness Printer took 40.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. [2019-12-07 18:24:03,921 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 173.57 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 98.6 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -153.6 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.25 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.80 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 150.59 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 30767.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 30.9 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.3 MB). Peak memory consumption was 84.2 MB. Max. memory is 11.5 GB. * Witness Printer took 40.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 == cond && x * u + y * v == a * 2 * b - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant [2019-12-07 18:24:03,925 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,925 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,925 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-12-07 18:24:03,925 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-12-07 18:24:03,926 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,926 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-12-07 18:24:03,926 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-12-07 18:24:03,926 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] Derived loop invariant: (1 == cond && x * u + y * v == a * 2 * b) || (((((((b == u && (\exists v_ULTIMATE.start_main_#t~ret0_8 : int :: v_ULTIMATE.start_main_#t~ret0_8 % 4294967296 == a && v_ULTIMATE.start_main_#t~ret0_8 % 4294967296 <= 2147483647)) && 1 <= a) && a == x) && 1 <= b) && x * u + y * v == a * 2 * b) && (\exists v_ULTIMATE.start_main_#t~ret1_9 : int :: v_ULTIMATE.start_main_#t~ret1_9 % 4294967296 <= 2147483647 && b == v_ULTIMATE.start_main_#t~ret1_9 % 4294967296)) && a == v) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Result: SAFE, OverallTime: 29.3s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.3s, HoareTripleCheckerStatistics: 53 SDtfs, 107 SDslu, 171 SDs, 0 SdLazy, 461 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 25.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 51 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 18 NumberOfFragments, 90 HoareAnnotationTreeSize, 4 FomulaSimplifications, 6267 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 195 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 22.7s InterpolantComputationTime, 116 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 106 ConstructedInterpolants, 68 QuantifiedInterpolants, 44895 SizeOfPredicates, 95 NumberOfNonLiveVariables, 421 ConjunctsInSsa, 255 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 35/90 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...