./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum.i --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/reducercommutativity/rangesum.i -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 279fae57395782089eff32ec1396d1726d808c7f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 20:46:10,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 20:46:10,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 20:46:10,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 20:46:10,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 20:46:10,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 20:46:10,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 20:46:10,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 20:46:10,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 20:46:10,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 20:46:10,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 20:46:10,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 20:46:10,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 20:46:10,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 20:46:10,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 20:46:10,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 20:46:10,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 20:46:10,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 20:46:10,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 20:46:10,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 20:46:10,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 20:46:10,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 20:46:10,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 20:46:10,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 20:46:10,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 20:46:10,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 20:46:10,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 20:46:10,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 20:46:10,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 20:46:10,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 20:46:10,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 20:46:10,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 20:46:10,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 20:46:10,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 20:46:10,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 20:46:10,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 20:46:10,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 20:46:10,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 20:46:10,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 20:46:10,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 20:46:10,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 20:46:10,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 20:46:10,519 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 20:46:10,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 20:46:10,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 20:46:10,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 20:46:10,521 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 20:46:10,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 20:46:10,522 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 20:46:10,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 20:46:10,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 20:46:10,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 20:46:10,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 20:46:10,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 20:46:10,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 20:46:10,525 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 20:46:10,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 20:46:10,526 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 20:46:10,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 20:46:10,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 20:46:10,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 20:46:10,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 20:46:10,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 20:46:10,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 20:46:10,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 20:46:10,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 20:46:10,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 20:46:10,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 20:46:10,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 20:46:10,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 20:46:10,530 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 -> 279fae57395782089eff32ec1396d1726d808c7f [2019-11-19 20:46:10,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 20:46:10,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 20:46:10,844 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 20:46:10,846 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 20:46:10,846 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 20:46:10,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-19 20:46:10,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305d378d8/e8e40249a3ac4fe1bfbe29e64e8f7ad3/FLAG4b9a3a1dd [2019-11-19 20:46:11,456 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 20:46:11,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-19 20:46:11,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305d378d8/e8e40249a3ac4fe1bfbe29e64e8f7ad3/FLAG4b9a3a1dd [2019-11-19 20:46:11,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305d378d8/e8e40249a3ac4fe1bfbe29e64e8f7ad3 [2019-11-19 20:46:11,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 20:46:11,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 20:46:11,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 20:46:11,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 20:46:11,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 20:46:11,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1385a5bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11, skipping insertion in model container [2019-11-19 20:46:11,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,791 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 20:46:11,810 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 20:46:12,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 20:46:12,009 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 20:46:12,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 20:46:12,047 INFO L192 MainTranslator]: Completed translation [2019-11-19 20:46:12,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12 WrapperNode [2019-11-19 20:46:12,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 20:46:12,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 20:46:12,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 20:46:12,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 20:46:12,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 20:46:12,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 20:46:12,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 20:46:12,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 20:46:12,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (1/1) ... [2019-11-19 20:46:12,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 20:46:12,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 20:46:12,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 20:46:12,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 20:46:12,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (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 20:46:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 20:46:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 20:46:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 20:46:12,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 20:46:12,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 20:46:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 20:46:12,665 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 20:46:12,665 INFO L285 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-19 20:46:12,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:46:12 BoogieIcfgContainer [2019-11-19 20:46:12,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 20:46:12,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 20:46:12,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 20:46:12,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 20:46:12,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:46:11" (1/3) ... [2019-11-19 20:46:12,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c34d680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:46:12, skipping insertion in model container [2019-11-19 20:46:12,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:12" (2/3) ... [2019-11-19 20:46:12,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c34d680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:46:12, skipping insertion in model container [2019-11-19 20:46:12,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:46:12" (3/3) ... [2019-11-19 20:46:12,675 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2019-11-19 20:46:12,683 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 20:46:12,689 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 20:46:12,699 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 20:46:12,725 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 20:46:12,726 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 20:46:12,726 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 20:46:12,726 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 20:46:12,727 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 20:46:12,727 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 20:46:12,727 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 20:46:12,727 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 20:46:12,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-19 20:46:12,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 20:46:12,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:12,749 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:12,749 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:12,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:12,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2019-11-19 20:46:12,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:12,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180692582] [2019-11-19 20:46:12,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:12,904 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 20:46:12,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180692582] [2019-11-19 20:46:12,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:12,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 20:46:12,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731123185] [2019-11-19 20:46:12,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 20:46:12,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:12,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 20:46:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 20:46:12,933 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-19 20:46:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:12,959 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2019-11-19 20:46:12,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 20:46:12,961 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-19 20:46:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:12,974 INFO L225 Difference]: With dead ends: 59 [2019-11-19 20:46:12,975 INFO L226 Difference]: Without dead ends: 27 [2019-11-19 20:46:12,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 20:46:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-19 20:46:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-19 20:46:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-19 20:46:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-19 20:46:13,021 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2019-11-19 20:46:13,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:13,022 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-19 20:46:13,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 20:46:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-19 20:46:13,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 20:46:13,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:13,024 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:13,024 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2019-11-19 20:46:13,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:13,026 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348073245] [2019-11-19 20:46:13,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:13,043 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:13,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833844679] [2019-11-19 20:46:13,044 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 20:46:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:13,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:13,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:13,183 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 20:46:13,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348073245] [2019-11-19 20:46:13,184 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:13,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833844679] [2019-11-19 20:46:13,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:13,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 20:46:13,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215651505] [2019-11-19 20:46:13,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 20:46:13,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 20:46:13,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:13,189 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-19 20:46:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:13,266 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2019-11-19 20:46:13,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 20:46:13,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-19 20:46:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:13,269 INFO L225 Difference]: With dead ends: 65 [2019-11-19 20:46:13,269 INFO L226 Difference]: Without dead ends: 48 [2019-11-19 20:46:13,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-19 20:46:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-11-19 20:46:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-19 20:46:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2019-11-19 20:46:13,289 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2019-11-19 20:46:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:13,290 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2019-11-19 20:46:13,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 20:46:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2019-11-19 20:46:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 20:46:13,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:13,294 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:13,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:13,500 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:13,501 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2019-11-19 20:46:13,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:13,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925693095] [2019-11-19 20:46:13,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:13,698 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 20:46:13,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925693095] [2019-11-19 20:46:13,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:13,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-19 20:46:13,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927550149] [2019-11-19 20:46:13,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 20:46:13,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 20:46:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-19 20:46:13,703 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 8 states. [2019-11-19 20:46:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:13,809 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2019-11-19 20:46:13,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 20:46:13,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-19 20:46:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:13,812 INFO L225 Difference]: With dead ends: 96 [2019-11-19 20:46:13,812 INFO L226 Difference]: Without dead ends: 91 [2019-11-19 20:46:13,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-19 20:46:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-19 20:46:13,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2019-11-19 20:46:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-19 20:46:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-11-19 20:46:13,826 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 18 [2019-11-19 20:46:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:13,827 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-11-19 20:46:13,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 20:46:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-11-19 20:46:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 20:46:13,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:13,829 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:13,829 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash -995174774, now seen corresponding path program 1 times [2019-11-19 20:46:13,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:13,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061752417] [2019-11-19 20:46:13,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:13,878 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:13,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63992320] [2019-11-19 20:46:13,878 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 20:46:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:13,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:13,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 20:46:14,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061752417] [2019-11-19 20:46:14,001 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:14,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63992320] [2019-11-19 20:46:14,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:14,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 20:46:14,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599749200] [2019-11-19 20:46:14,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 20:46:14,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 20:46:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:14,005 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 3 states. [2019-11-19 20:46:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:14,079 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2019-11-19 20:46:14,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 20:46:14,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-19 20:46:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:14,084 INFO L225 Difference]: With dead ends: 115 [2019-11-19 20:46:14,087 INFO L226 Difference]: Without dead ends: 61 [2019-11-19 20:46:14,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-19 20:46:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-19 20:46:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-19 20:46:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2019-11-19 20:46:14,114 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 21 [2019-11-19 20:46:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:14,115 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2019-11-19 20:46:14,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 20:46:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2019-11-19 20:46:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 20:46:14,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:14,118 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:14,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:14,322 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2100366548, now seen corresponding path program 1 times [2019-11-19 20:46:14,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:14,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100184068] [2019-11-19 20:46:14,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:14,357 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:14,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729456596] [2019-11-19 20:46:14,358 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 20:46:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:14,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 20:46:14,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 20:46:14,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100184068] [2019-11-19 20:46:14,451 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:14,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729456596] [2019-11-19 20:46:14,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:14,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 20:46:14,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183739643] [2019-11-19 20:46:14,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:14,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:14,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:14,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:14,454 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 4 states. [2019-11-19 20:46:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:14,547 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2019-11-19 20:46:14,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:14,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-19 20:46:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:14,549 INFO L225 Difference]: With dead ends: 117 [2019-11-19 20:46:14,549 INFO L226 Difference]: Without dead ends: 63 [2019-11-19 20:46:14,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-19 20:46:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-19 20:46:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-19 20:46:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-11-19 20:46:14,565 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 23 [2019-11-19 20:46:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:14,566 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-11-19 20:46:14,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-11-19 20:46:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-19 20:46:14,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:14,571 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:14,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:14,775 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash 962228046, now seen corresponding path program 2 times [2019-11-19 20:46:14,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:14,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856062802] [2019-11-19 20:46:14,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:14,803 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:14,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31931525] [2019-11-19 20:46:14,804 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 20:46:14,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-19 20:46:14,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:14,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:14,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 20:46:14,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856062802] [2019-11-19 20:46:14,881 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:14,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31931525] [2019-11-19 20:46:14,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:14,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 20:46:14,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557937956] [2019-11-19 20:46:14,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:14,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:14,884 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 4 states. [2019-11-19 20:46:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:14,983 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2019-11-19 20:46:14,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:14,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-19 20:46:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:14,986 INFO L225 Difference]: With dead ends: 127 [2019-11-19 20:46:14,986 INFO L226 Difference]: Without dead ends: 77 [2019-11-19 20:46:14,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-19 20:46:15,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2019-11-19 20:46:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-19 20:46:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2019-11-19 20:46:15,010 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 25 [2019-11-19 20:46:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:15,012 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2019-11-19 20:46:15,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2019-11-19 20:46:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-19 20:46:15,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:15,014 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:15,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:15,221 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:15,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1979262774, now seen corresponding path program 1 times [2019-11-19 20:46:15,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:15,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157256686] [2019-11-19 20:46:15,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:15,246 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:15,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840977365] [2019-11-19 20:46:15,247 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 20:46:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:15,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 20:46:15,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-19 20:46:15,361 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157256686] [2019-11-19 20:46:15,361 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:15,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840977365] [2019-11-19 20:46:15,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:15,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 20:46:15,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218068804] [2019-11-19 20:46:15,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 20:46:15,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 20:46:15,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:46:15,364 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 5 states. [2019-11-19 20:46:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:15,477 INFO L93 Difference]: Finished difference Result 150 states and 206 transitions. [2019-11-19 20:46:15,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 20:46:15,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-11-19 20:46:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:15,479 INFO L225 Difference]: With dead ends: 150 [2019-11-19 20:46:15,479 INFO L226 Difference]: Without dead ends: 92 [2019-11-19 20:46:15,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:46:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-19 20:46:15,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-19 20:46:15,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-19 20:46:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2019-11-19 20:46:15,491 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 34 [2019-11-19 20:46:15,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:15,491 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2019-11-19 20:46:15,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 20:46:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2019-11-19 20:46:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-19 20:46:15,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:15,493 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:15,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:15,697 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash -387145522, now seen corresponding path program 2 times [2019-11-19 20:46:15,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:15,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070404450] [2019-11-19 20:46:15,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:15,743 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:15,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484100294] [2019-11-19 20:46:15,744 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 20:46:15,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-19 20:46:15,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:15,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:15,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-19 20:46:15,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070404450] [2019-11-19 20:46:15,854 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:15,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484100294] [2019-11-19 20:46:15,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:15,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 20:46:15,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26903500] [2019-11-19 20:46:15,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:15,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:15,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:15,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:15,858 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 4 states. [2019-11-19 20:46:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:15,928 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-11-19 20:46:15,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:15,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-19 20:46:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:15,931 INFO L225 Difference]: With dead ends: 122 [2019-11-19 20:46:15,931 INFO L226 Difference]: Without dead ends: 91 [2019-11-19 20:46:15,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-19 20:46:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-19 20:46:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-19 20:46:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2019-11-19 20:46:15,941 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 43 [2019-11-19 20:46:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:15,943 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2019-11-19 20:46:15,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2019-11-19 20:46:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-19 20:46:15,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:15,947 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:16,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:16,150 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 1 times [2019-11-19 20:46:16,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:16,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335371640] [2019-11-19 20:46:16,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:16,173 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:16,174 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280113386] [2019-11-19 20:46:16,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:46:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:16,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 20:46:16,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-19 20:46:16,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335371640] [2019-11-19 20:46:16,333 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:16,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280113386] [2019-11-19 20:46:16,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:16,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-19 20:46:16,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917804020] [2019-11-19 20:46:16,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 20:46:16,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:16,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 20:46:16,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-19 20:46:16,335 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 9 states. [2019-11-19 20:46:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:16,523 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2019-11-19 20:46:16,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 20:46:16,524 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-11-19 20:46:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:16,526 INFO L225 Difference]: With dead ends: 197 [2019-11-19 20:46:16,526 INFO L226 Difference]: Without dead ends: 92 [2019-11-19 20:46:16,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-19 20:46:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-19 20:46:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-19 20:46:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-19 20:46:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2019-11-19 20:46:16,547 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 45 [2019-11-19 20:46:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:16,548 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2019-11-19 20:46:16,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 20:46:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2019-11-19 20:46:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-19 20:46:16,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:16,550 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:16,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:16,754 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:16,755 INFO L82 PathProgramCache]: Analyzing trace with hash -3446958, now seen corresponding path program 2 times [2019-11-19 20:46:16,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:16,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607807138] [2019-11-19 20:46:16,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:16,787 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:16,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541312424] [2019-11-19 20:46:16,787 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 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 20:46:16,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 20:46:16,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:16,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 20:46:16,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-19 20:46:16,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607807138] [2019-11-19 20:46:16,965 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:16,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541312424] [2019-11-19 20:46:16,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:16,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-19 20:46:16,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216662243] [2019-11-19 20:46:16,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 20:46:16,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 20:46:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-19 20:46:16,968 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 9 states. [2019-11-19 20:46:17,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:17,125 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2019-11-19 20:46:17,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 20:46:17,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-19 20:46:17,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:17,127 INFO L225 Difference]: With dead ends: 171 [2019-11-19 20:46:17,127 INFO L226 Difference]: Without dead ends: 116 [2019-11-19 20:46:17,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-11-19 20:46:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-19 20:46:17,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2019-11-19 20:46:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-19 20:46:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2019-11-19 20:46:17,137 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 47 [2019-11-19 20:46:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:17,137 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2019-11-19 20:46:17,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 20:46:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2019-11-19 20:46:17,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-19 20:46:17,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:17,139 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:17,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:17,349 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash -384159915, now seen corresponding path program 1 times [2019-11-19 20:46:17,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:17,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857647839] [2019-11-19 20:46:17,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:17,366 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:17,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613693988] [2019-11-19 20:46:17,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:46:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:17,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 20:46:17,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-19 20:46:17,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857647839] [2019-11-19 20:46:17,483 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:17,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613693988] [2019-11-19 20:46:17,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:17,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-19 20:46:17,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481846617] [2019-11-19 20:46:17,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 20:46:17,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 20:46:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-19 20:46:17,485 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 8 states. [2019-11-19 20:46:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:17,586 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2019-11-19 20:46:17,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 20:46:17,587 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-19 20:46:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:17,588 INFO L225 Difference]: With dead ends: 138 [2019-11-19 20:46:17,588 INFO L226 Difference]: Without dead ends: 105 [2019-11-19 20:46:17,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-11-19 20:46:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-19 20:46:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-19 20:46:17,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-19 20:46:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2019-11-19 20:46:17,596 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 53 [2019-11-19 20:46:17,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:17,597 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2019-11-19 20:46:17,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 20:46:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2019-11-19 20:46:17,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-19 20:46:17,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:17,598 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:17,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:17,809 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:17,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1685231241, now seen corresponding path program 2 times [2019-11-19 20:46:17,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:17,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429534224] [2019-11-19 20:46:17,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:17,826 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:17,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910413366] [2019-11-19 20:46:17,827 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 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 20:46:17,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 20:46:17,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:17,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 20:46:17,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-19 20:46:17,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429534224] [2019-11-19 20:46:17,993 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:17,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910413366] [2019-11-19 20:46:17,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:17,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-19 20:46:17,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730150785] [2019-11-19 20:46:17,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 20:46:17,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:17,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 20:46:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-19 20:46:17,995 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 10 states. [2019-11-19 20:46:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:18,243 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2019-11-19 20:46:18,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 20:46:18,244 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-11-19 20:46:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:18,245 INFO L225 Difference]: With dead ends: 272 [2019-11-19 20:46:18,245 INFO L226 Difference]: Without dead ends: 187 [2019-11-19 20:46:18,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-19 20:46:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-19 20:46:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2019-11-19 20:46:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-19 20:46:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-11-19 20:46:18,258 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 55 [2019-11-19 20:46:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:18,258 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-11-19 20:46:18,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 20:46:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-11-19 20:46:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-19 20:46:18,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:18,260 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:18,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:18,464 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2019-11-19 20:46:18,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:18,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025218207] [2019-11-19 20:46:18,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:18,476 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:18,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120599142] [2019-11-19 20:46:18,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 20:46:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 20:46:18,652 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 20:46:18,652 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 20:46:18,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:18,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:46:18 BoogieIcfgContainer [2019-11-19 20:46:18,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 20:46:18,933 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 20:46:18,933 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 20:46:18,934 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 20:46:18,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:46:12" (3/4) ... [2019-11-19 20:46:18,936 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 20:46:19,022 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 20:46:19,022 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 20:46:19,025 INFO L168 Benchmark]: Toolchain (without parser) took 7249.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 215.5 MB). Free memory was 949.6 MB in the beginning and 1.0 GB in the end (delta: -66.1 MB). Peak memory consumption was 149.4 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:19,025 INFO L168 Benchmark]: CDTParser took 0.28 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 20:46:19,026 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.33 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 938.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:19,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 108.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:19,027 INFO L168 Benchmark]: Boogie Preprocessor took 33.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 20:46:19,027 INFO L168 Benchmark]: RCFGBuilder took 476.71 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: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:19,028 INFO L168 Benchmark]: TraceAbstraction took 6265.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 90.6 MB). Peak memory consumption was 156.7 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:19,029 INFO L168 Benchmark]: Witness Printer took 88.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:19,031 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 272.33 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 938.9 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 108.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 938.9 MB in the beginning and 1.1 GB in the end (delta: -200.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 476.71 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: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6265.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 90.6 MB). Peak memory consumption was 156.7 MB. Max. memory is 11.5 GB. * Witness Printer took 88.93 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L6] int i; [L7] i = 0 VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND FALSE !(i < N) VAL [N=3] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [N=3] [L46] COND TRUE i N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L53] __VERIFIER_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.2s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 579 SDslu, 411 SDs, 0 SdLazy, 718 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 455 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 37966 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1412 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 168/199 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 incorrect! Received shutdown request...