./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 678e0110 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/lcm2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.1.24-678e011 [2019-11-19 21:18:04,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 21:18:04,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 21:18:04,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 21:18:04,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 21:18:04,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 21:18:04,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 21:18:04,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 21:18:04,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 21:18:04,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 21:18:04,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 21:18:04,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 21:18:04,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 21:18:04,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 21:18:04,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 21:18:04,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 21:18:04,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 21:18:04,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 21:18:04,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 21:18:04,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 21:18:04,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 21:18:04,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 21:18:04,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 21:18:04,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 21:18:04,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 21:18:04,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 21:18:04,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 21:18:04,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 21:18:04,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 21:18:04,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 21:18:04,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 21:18:04,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 21:18:04,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 21:18:04,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 21:18:04,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 21:18:04,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 21:18:04,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 21:18:04,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 21:18:04,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 21:18:04,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 21:18:04,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 21:18:04,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 21:18:04,937 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 21:18:04,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 21:18:04,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 21:18:04,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 21:18:04,941 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 21:18:04,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 21:18:04,942 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 21:18:04,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 21:18:04,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 21:18:04,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 21:18:04,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 21:18:04,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 21:18:04,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 21:18:04,945 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 21:18:04,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 21:18:04,945 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 21:18:04,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 21:18:04,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 21:18:04,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 21:18:04,947 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 21:18:04,947 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 21:18:04,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:18:04,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 21:18:04,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 21:18:04,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 21:18:04,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 21:18:04,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 21:18:04,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 21:18:04,949 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 [2019-11-19 21:18:05,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 21:18:05,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 21:18:05,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 21:18:05,272 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 21:18:05,273 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 21:18:05,274 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/lcm2.c [2019-11-19 21:18:05,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4744075/a3ee05d5c3414f13a93848d349d9033e/FLAGb7b4aab8d [2019-11-19 21:18:05,745 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 21:18:05,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/lcm2.c [2019-11-19 21:18:05,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4744075/a3ee05d5c3414f13a93848d349d9033e/FLAGb7b4aab8d [2019-11-19 21:18:06,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf4744075/a3ee05d5c3414f13a93848d349d9033e [2019-11-19 21:18:06,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 21:18:06,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 21:18:06,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 21:18:06,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 21:18:06,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 21:18:06,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41434439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06, skipping insertion in model container [2019-11-19 21:18:06,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,203 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 21:18:06,225 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 21:18:06,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:18:06,406 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 21:18:06,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:18:06,432 INFO L192 MainTranslator]: Completed translation [2019-11-19 21:18:06,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06 WrapperNode [2019-11-19 21:18:06,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 21:18:06,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 21:18:06,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 21:18:06,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 21:18:06,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 21:18:06,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 21:18:06,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 21:18:06,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 21:18:06,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... [2019-11-19 21:18:06,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 21:18:06,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 21:18:06,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 21:18:06,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 21:18:06,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 21:18:06,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 21:18:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2019-11-19 21:18:06,791 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 21:18:06,792 INFO L285 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-19 21:18:06,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:18:06 BoogieIcfgContainer [2019-11-19 21:18:06,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 21:18:06,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 21:18:06,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 21:18:06,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 21:18:06,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:18:06" (1/3) ... [2019-11-19 21:18:06,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f7beed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:18:06, skipping insertion in model container [2019-11-19 21:18:06,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:18:06" (2/3) ... [2019-11-19 21:18:06,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f7beed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:18:06, skipping insertion in model container [2019-11-19 21:18:06,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:18:06" (3/3) ... [2019-11-19 21:18:06,803 INFO L109 eAbstractionObserver]: Analyzing ICFG lcm2.c [2019-11-19 21:18:06,818 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 21:18:06,828 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-19 21:18:06,854 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-19 21:18:06,883 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 21:18:06,884 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 21:18:06,884 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 21:18:06,884 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 21:18:06,885 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 21:18:06,885 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 21:18:06,885 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 21:18:06,885 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 21:18:06,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-19 21:18:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-19 21:18:06,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:06,907 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-19 21:18:06,907 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-19 21:18:06,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:06,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605350330] [2019-11-19 21:18:06,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:06,995 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:06,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538574740] [2019-11-19 21:18:06,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:18:07,033 WARN L253 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 21:18:07,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:07,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:18:07,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605350330] [2019-11-19 21:18:07,134 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:07,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538574740] [2019-11-19 21:18:07,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:18:07,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 21:18:07,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189707453] [2019-11-19 21:18:07,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 21:18:07,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 21:18:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:18:07,154 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2019-11-19 21:18:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:07,269 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2019-11-19 21:18:07,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 21:18:07,271 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-19 21:18:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:07,280 INFO L225 Difference]: With dead ends: 40 [2019-11-19 21:18:07,281 INFO L226 Difference]: Without dead ends: 16 [2019-11-19 21:18:07,283 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 [2019-11-19 21:18:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-19 21:18:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-11-19 21:18:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 21:18:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-19 21:18:07,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 4 [2019-11-19 21:18:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:07,311 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-19 21:18:07,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 21:18:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-19 21:18:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 21:18:07,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:07,312 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-19 21:18:07,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:07,516 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash 759715009, now seen corresponding path program 1 times [2019-11-19 21:18:07,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:07,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877360896] [2019-11-19 21:18:07,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:07,532 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:07,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977276517] [2019-11-19 21:18:07,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:18:07,565 WARN L253 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-19 21:18:07,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:07,721 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2019-11-19 21:18:07,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:18:07,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877360896] [2019-11-19 21:18:07,850 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:07,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977276517] [2019-11-19 21:18:07,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:07,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 21:18:07,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311778162] [2019-11-19 21:18:07,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 21:18:07,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 21:18:07,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 21:18:07,856 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-19 21:18:08,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:08,034 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-11-19 21:18:08,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 21:18:08,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-19 21:18:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:08,037 INFO L225 Difference]: With dead ends: 26 [2019-11-19 21:18:08,037 INFO L226 Difference]: Without dead ends: 20 [2019-11-19 21:18:08,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:18:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-19 21:18:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-19 21:18:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-19 21:18:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-19 21:18:08,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2019-11-19 21:18:08,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:08,052 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-19 21:18:08,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 21:18:08,052 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-19 21:18:08,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 21:18:08,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:08,054 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-19 21:18:08,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:08,260 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:08,261 INFO L82 PathProgramCache]: Analyzing trace with hash 759774591, now seen corresponding path program 1 times [2019-11-19 21:18:08,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:08,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225034633] [2019-11-19 21:18:08,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:08,277 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:08,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373756611] [2019-11-19 21:18:08,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:18:08,305 WARN L253 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-19 21:18:08,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:08,533 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2019-11-19 21:18:08,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:18:08,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225034633] [2019-11-19 21:18:08,671 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:08,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373756611] [2019-11-19 21:18:08,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:08,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 21:18:08,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491421197] [2019-11-19 21:18:08,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 21:18:08,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:08,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 21:18:08,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 21:18:08,674 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2019-11-19 21:18:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:08,883 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-19 21:18:08,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 21:18:08,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-19 21:18:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:08,885 INFO L225 Difference]: With dead ends: 29 [2019-11-19 21:18:08,885 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 21:18:08,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:18:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 21:18:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-11-19 21:18:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-19 21:18:08,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-19 21:18:08,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2019-11-19 21:18:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:08,893 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-19 21:18:08,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 21:18:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-19 21:18:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 21:18:08,894 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:08,895 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-11-19 21:18:09,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:09,098 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:09,099 INFO L82 PathProgramCache]: Analyzing trace with hash -54520842, now seen corresponding path program 2 times [2019-11-19 21:18:09,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:09,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493727096] [2019-11-19 21:18:09,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:09,110 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:09,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748182557] [2019-11-19 21:18:09,111 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:09,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:18:09,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:18:09,144 WARN L253 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-19 21:18:09,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:09,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:18:09,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493727096] [2019-11-19 21:18:09,297 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:09,297 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748182557] [2019-11-19 21:18:09,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:09,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 21:18:09,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121737397] [2019-11-19 21:18:09,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:18:09,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:18:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:18:09,299 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2019-11-19 21:18:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:09,518 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-19 21:18:09,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:18:09,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-19 21:18:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:09,521 INFO L225 Difference]: With dead ends: 33 [2019-11-19 21:18:09,521 INFO L226 Difference]: Without dead ends: 27 [2019-11-19 21:18:09,521 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 [2019-11-19 21:18:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-19 21:18:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-19 21:18:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 21:18:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-19 21:18:09,534 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-19 21:18:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:09,535 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-19 21:18:09,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:18:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-19 21:18:09,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 21:18:09,536 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:09,537 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-11-19 21:18:09,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:09,744 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash -54461260, now seen corresponding path program 1 times [2019-11-19 21:18:09,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:09,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632016478] [2019-11-19 21:18:09,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:09,762 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:09,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190012030] [2019-11-19 21:18:09,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:18:09,792 WARN L253 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-19 21:18:09,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:09,942 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2019-11-19 21:18:10,144 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2019-11-19 21:18:10,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:18:10,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632016478] [2019-11-19 21:18:10,260 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:10,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190012030] [2019-11-19 21:18:10,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:10,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 21:18:10,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993372985] [2019-11-19 21:18:10,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:18:10,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:10,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:18:10,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:18:10,262 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-19 21:18:12,062 WARN L191 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 49 [2019-11-19 21:18:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:12,259 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-19 21:18:12,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:18:12,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-19 21:18:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:12,260 INFO L225 Difference]: With dead ends: 33 [2019-11-19 21:18:12,260 INFO L226 Difference]: Without dead ends: 27 [2019-11-19 21:18:12,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-19 21:18:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-19 21:18:12,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-19 21:18:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 21:18:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-19 21:18:12,270 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-19 21:18:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:12,270 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-19 21:18:12,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:18:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-19 21:18:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 21:18:12,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:12,272 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2019-11-19 21:18:12,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:12,476 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash -863867468, now seen corresponding path program 2 times [2019-11-19 21:18:12,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:12,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756320264] [2019-11-19 21:18:12,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:12,485 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:12,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674181167] [2019-11-19 21:18:12,486 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:12,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:18:12,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:18:12,541 WARN L253 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-19 21:18:12,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:12,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:18:12,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756320264] [2019-11-19 21:18:12,712 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:12,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674181167] [2019-11-19 21:18:12,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:12,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 21:18:12,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278234523] [2019-11-19 21:18:12,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:18:12,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:18:12,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:18:12,714 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-19 21:18:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:12,947 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-19 21:18:12,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:18:12,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-19 21:18:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:12,949 INFO L225 Difference]: With dead ends: 37 [2019-11-19 21:18:12,949 INFO L226 Difference]: Without dead ends: 31 [2019-11-19 21:18:12,950 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 [2019-11-19 21:18:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-19 21:18:12,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-19 21:18:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 21:18:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-19 21:18:12,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2019-11-19 21:18:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:12,958 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-19 21:18:12,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:18:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-19 21:18:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 21:18:12,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:12,959 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2019-11-19 21:18:13,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:13,170 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash -863807886, now seen corresponding path program 2 times [2019-11-19 21:18:13,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:13,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181780131] [2019-11-19 21:18:13,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:13,178 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:13,182 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367347432] [2019-11-19 21:18:13,182 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:13,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 21:18:13,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:18:13,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-19 21:18:13,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:13,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:18:13,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181780131] [2019-11-19 21:18:13,295 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:13,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367347432] [2019-11-19 21:18:13,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:13,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 21:18:13,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452403463] [2019-11-19 21:18:13,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:18:13,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:13,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:18:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:18:13,297 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-11-19 21:18:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:13,502 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-19 21:18:13,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:18:13,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-19 21:18:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:13,503 INFO L225 Difference]: With dead ends: 38 [2019-11-19 21:18:13,503 INFO L226 Difference]: Without dead ends: 32 [2019-11-19 21:18:13,504 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 [2019-11-19 21:18:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-19 21:18:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2019-11-19 21:18:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 21:18:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-19 21:18:13,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-19 21:18:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:13,512 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-19 21:18:13,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:18:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-19 21:18:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 21:18:13,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:13,514 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1] [2019-11-19 21:18:13,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:13,717 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1087688533, now seen corresponding path program 3 times [2019-11-19 21:18:13,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:13,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131706882] [2019-11-19 21:18:13,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:13,734 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:13,735 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010810808] [2019-11-19 21:18:13,735 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:13,764 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 21:18:13,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:18:13,765 WARN L253 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-19 21:18:13,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:15,030 WARN L191 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-11-19 21:18:17,055 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2019-11-19 21:18:19,106 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2019-11-19 21:18:19,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:21,157 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 30 [2019-11-19 21:18:21,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 21:18:21,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131706882] [2019-11-19 21:18:21,201 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:21,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010810808] [2019-11-19 21:18:21,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:21,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 21:18:21,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719469477] [2019-11-19 21:18:21,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 21:18:21,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:21,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 21:18:21,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-19 21:18:21,203 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2019-11-19 21:18:21,394 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-11-19 21:18:21,682 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2019-11-19 21:18:21,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:21,905 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-11-19 21:18:21,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 21:18:21,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-19 21:18:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:21,908 INFO L225 Difference]: With dead ends: 41 [2019-11-19 21:18:21,909 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 21:18:21,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:18:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 21:18:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-11-19 21:18:21,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 21:18:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-19 21:18:21,924 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 16 [2019-11-19 21:18:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:21,924 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-19 21:18:21,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 21:18:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-19 21:18:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 21:18:21,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:21,926 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2019-11-19 21:18:22,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:22,137 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1087628951, now seen corresponding path program 3 times [2019-11-19 21:18:22,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:22,138 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29903287] [2019-11-19 21:18:22,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:22,146 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:22,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386127769] [2019-11-19 21:18:22,147 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:22,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 21:18:22,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:18:22,184 WARN L253 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 21:18:22,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:22,516 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-19 21:18:22,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-19 21:18:22,774 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2019-11-19 21:18:22,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-19 21:18:22,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29903287] [2019-11-19 21:18:22,796 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:22,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386127769] [2019-11-19 21:18:22,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:22,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 21:18:22,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10768680] [2019-11-19 21:18:22,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 21:18:22,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:22,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 21:18:22,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-19 21:18:22,798 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2019-11-19 21:18:23,078 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2019-11-19 21:18:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:25,299 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-19 21:18:25,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 21:18:25,300 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-19 21:18:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:25,301 INFO L225 Difference]: With dead ends: 44 [2019-11-19 21:18:25,301 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 21:18:25,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:18:25,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 21:18:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-11-19 21:18:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 21:18:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-19 21:18:25,309 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-11-19 21:18:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:25,309 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-19 21:18:25,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 21:18:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-19 21:18:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 21:18:25,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:18:25,310 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2019-11-19 21:18:25,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:25,511 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 21:18:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:18:25,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1897035159, now seen corresponding path program 4 times [2019-11-19 21:18:25,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 21:18:25,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94559690] [2019-11-19 21:18:25,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 21:18:25,520 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 21:18:25,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780322631] [2019-11-19 21:18:25,520 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-19 21:18:25,544 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 21:18:25,545 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 21:18:25,546 WARN L253 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-19 21:18:25,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:18:25,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:27,599 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 14 [2019-11-19 21:18:29,682 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2019-11-19 21:18:29,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:29,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 21:18:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 4 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 21:18:33,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94559690] [2019-11-19 21:18:33,812 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 21:18:33,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780322631] [2019-11-19 21:18:33,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 21:18:33,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 21:18:33,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342954363] [2019-11-19 21:18:33,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 21:18:33,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 21:18:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 21:18:33,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=26, Unknown=2, NotChecked=0, Total=42 [2019-11-19 21:18:33,814 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-19 21:18:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:18:33,861 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-11-19 21:18:33,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 21:18:33,862 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-19 21:18:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:18:33,862 INFO L225 Difference]: With dead ends: 26 [2019-11-19 21:18:33,862 INFO L226 Difference]: Without dead ends: 0 [2019-11-19 21:18:33,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=21, Invalid=33, Unknown=2, NotChecked=0, Total=56 [2019-11-19 21:18:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-19 21:18:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-19 21:18:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-19 21:18:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-19 21:18:33,864 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-11-19 21:18:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:18:33,865 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 21:18:33,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 21:18:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-19 21:18:33,865 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-19 21:18:34,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 21:18:34,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-19 21:18:34,176 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 17 [2019-11-19 21:18:38,802 WARN L191 SmtUtils]: Spent 4.56 s on a formula simplification. DAG size of input: 117 DAG size of output: 40 [2019-11-19 21:18:38,805 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-19 21:18:38,806 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-11-19 21:18:38,806 INFO L444 ceAbstractionStarter]: For program point L7(lines 7 10) no Hoare annotation was computed. [2019-11-19 21:18:38,806 INFO L440 ceAbstractionStarter]: 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))) [2019-11-19 21:18:38,807 INFO L444 ceAbstractionStarter]: For program point L36(lines 36 42) no Hoare annotation was computed. [2019-11-19 21:18:38,807 INFO L444 ceAbstractionStarter]: For program point L7-3(lines 7 10) no Hoare annotation was computed. [2019-11-19 21:18:38,807 INFO L440 ceAbstractionStarter]: 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 (and (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~u~0) (<= 1 ULTIMATE.start_main_~a~0) .cse0) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) (and (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)))) (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))))) (<= 1 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~v~0)) (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2019-11-19 21:18:38,807 INFO L447 ceAbstractionStarter]: At program point L7-5(lines 6 12) the Hoare annotation is: true [2019-11-19 21:18:38,808 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-19 21:18:38,808 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-19 21:18:38,808 INFO L444 ceAbstractionStarter]: For program point L30-2(lines 30 43) no Hoare annotation was computed. [2019-11-19 21:18:38,808 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2019-11-19 21:18:38,808 INFO L447 ceAbstractionStarter]: At program point L49(lines 14 50) the Hoare annotation is: true [2019-11-19 21:18:38,808 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 9) no Hoare annotation was computed. [2019-11-19 21:18:38,809 INFO L444 ceAbstractionStarter]: For program point L8-1(lines 8 9) no Hoare annotation was computed. [2019-11-19 21:18:38,823 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,824 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,824 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-11-19 21:18:38,824 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-11-19 21:18:38,826 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,826 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,826 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-11-19 21:18:38,830 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-11-19 21:18:38,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:18:38 BoogieIcfgContainer [2019-11-19 21:18:38,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 21:18:38,834 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 21:18:38,834 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 21:18:38,835 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 21:18:38,835 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:18:06" (3/4) ... [2019-11-19 21:18:38,839 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-19 21:18:38,850 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-19 21:18:38,850 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-19 21:18:38,877 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((b == u && 1 <= a) && x * u + y * v == a * 2 * b) && a == x) && (\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) && (\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)) && 1 <= b) && a == v) || (1 == cond && x * u + y * v == a * 2 * b) [2019-11-19 21:18:38,902 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 21:18:38,902 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 21:18:38,905 INFO L168 Benchmark]: Toolchain (without parser) took 32720.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 207.6 MB). Free memory was 955.0 MB in the beginning and 864.1 MB in the end (delta: 90.9 MB). Peak memory consumption was 298.5 MB. Max. memory is 11.5 GB. [2019-11-19 21:18:38,906 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:18:38,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.87 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 21:18:38,909 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -203.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 21:18:38,910 INFO L168 Benchmark]: Boogie Preprocessor took 21.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-19 21:18:38,911 INFO L168 Benchmark]: RCFGBuilder took 255.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2019-11-19 21:18:38,912 INFO L168 Benchmark]: TraceAbstraction took 32039.38 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 864.1 MB in the end (delta: 266.7 MB). Peak memory consumption was 322.8 MB. Max. memory is 11.5 GB. [2019-11-19 21:18:38,912 INFO L168 Benchmark]: Witness Printer took 68.04 ms. Allocated memory is still 1.2 GB. Free memory is still 864.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:18:38,918 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 247.87 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 82.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -203.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 255.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 32039.38 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 864.1 MB in the end (delta: 266.7 MB). Peak memory consumption was 322.8 MB. Max. memory is 11.5 GB. * Witness Printer took 68.04 ms. Allocated memory is still 1.2 GB. Free memory is still 864.1 MB. There was no memory consumed. 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 [2019-11-19 21:18:38,930 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,930 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,931 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-11-19 21:18:38,931 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-11-19 21:18:38,932 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,932 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret0_8,QUANTIFIED] [2019-11-19 21:18:38,933 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] [2019-11-19 21:18:38,933 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_ULTIMATE.start_main_#t~ret1_9,QUANTIFIED] Derived loop invariant: ((((((b == u && 1 <= a) && x * u + y * v == a * 2 * b) && a == x) && (\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) && (\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)) && 1 <= b) && a == v) || (1 == cond && x * u + y * v == a * 2 * b) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Result: SAFE, OverallTime: 31.9s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.7s, HoareTripleCheckerStatistics: 53 SDtfs, 107 SDslu, 171 SDs, 0 SdLazy, 460 SolverSat, 106 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 20.5s 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, 92 HoareAnnotationTreeSize, 4 FomulaSimplifications, 6254 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 200 FormulaSimplificationTreeSizeReductionInter, 4.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 17.9s InterpolantComputationTime, 116 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 106 ConstructedInterpolants, 68 QuantifiedInterpolants, 44880 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...