./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f6fb2bb1 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/array-fpi/eqn2f.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c6e78e9875ea4d3aa8cd80df3425a04d4efa8e7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-f6fb2bb [2019-11-19 18:24:58,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 18:24:58,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 18:24:58,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 18:24:58,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 18:24:58,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 18:24:58,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 18:24:58,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 18:24:58,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 18:24:58,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 18:24:58,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 18:24:58,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 18:24:58,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 18:24:58,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 18:24:58,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 18:24:58,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 18:24:58,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 18:24:58,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 18:24:58,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 18:24:58,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 18:24:58,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 18:24:58,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 18:24:58,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 18:24:58,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 18:24:58,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 18:24:58,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 18:24:58,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 18:24:58,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 18:24:58,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 18:24:58,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 18:24:58,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 18:24:58,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 18:24:58,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 18:24:58,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 18:24:58,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 18:24:58,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 18:24:58,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 18:24:58,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 18:24:58,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 18:24:58,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 18:24:58,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 18:24:58,386 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 18:24:58,409 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 18:24:58,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 18:24:58,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 18:24:58,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 18:24:58,413 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 18:24:58,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 18:24:58,414 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 18:24:58,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 18:24:58,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 18:24:58,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 18:24:58,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 18:24:58,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 18:24:58,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 18:24:58,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 18:24:58,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 18:24:58,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 18:24:58,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 18:24:58,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 18:24:58,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 18:24:58,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 18:24:58,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 18:24:58,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 18:24:58,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 18:24:58,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 18:24:58,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 18:24:58,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 18:24:58,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 18:24:58,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 18:24:58,422 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 -> 2c6e78e9875ea4d3aa8cd80df3425a04d4efa8e7 [2019-11-19 18:24:58,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 18:24:58,754 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 18:24:58,758 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 18:24:58,759 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 18:24:58,760 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 18:24:58,761 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2f.c [2019-11-19 18:24:58,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423b3176d/f211749e3e894732afad98eca8641494/FLAG33bed2bfd [2019-11-19 18:24:59,274 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 18:24:59,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2019-11-19 18:24:59,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423b3176d/f211749e3e894732afad98eca8641494/FLAG33bed2bfd [2019-11-19 18:24:59,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/423b3176d/f211749e3e894732afad98eca8641494 [2019-11-19 18:24:59,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 18:24:59,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 18:24:59,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 18:24:59,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 18:24:59,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 18:24:59,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:24:59" (1/1) ... [2019-11-19 18:24:59,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429fe01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:24:59, skipping insertion in model container [2019-11-19 18:24:59,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:24:59" (1/1) ... [2019-11-19 18:24:59,708 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 18:24:59,732 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 18:24:59,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:25:00,001 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 18:25:00,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 18:25:00,041 INFO L192 MainTranslator]: Completed translation [2019-11-19 18:25:00,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00 WrapperNode [2019-11-19 18:25:00,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 18:25:00,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 18:25:00,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 18:25:00,044 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 18:25:00,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,145 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 18:25:00,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 18:25:00,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 18:25:00,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 18:25:00,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (1/1) ... [2019-11-19 18:25:00,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 18:25:00,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 18:25:00,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 18:25:00,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 18:25:00,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (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 18:25:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 18:25:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 18:25:00,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 18:25:00,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 18:25:00,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 18:25:00,530 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 18:25:00,531 INFO L285 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-19 18:25:00,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:25:00 BoogieIcfgContainer [2019-11-19 18:25:00,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 18:25:00,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 18:25:00,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 18:25:00,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 18:25:00,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:24:59" (1/3) ... [2019-11-19 18:25:00,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f0c150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:25:00, skipping insertion in model container [2019-11-19 18:25:00,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:25:00" (2/3) ... [2019-11-19 18:25:00,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f0c150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:25:00, skipping insertion in model container [2019-11-19 18:25:00,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:25:00" (3/3) ... [2019-11-19 18:25:00,543 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2019-11-19 18:25:00,555 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 18:25:00,567 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 18:25:00,587 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 18:25:00,612 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 18:25:00,613 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 18:25:00,613 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 18:25:00,613 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 18:25:00,613 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 18:25:00,614 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 18:25:00,614 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 18:25:00,614 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 18:25:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-19 18:25:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 18:25:00,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:00,635 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:00,635 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-11-19 18:25:00,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:00,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90382653] [2019-11-19 18:25:00,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:25:00,796 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 18:25:00,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90382653] [2019-11-19 18:25:00,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:25:00,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 18:25:00,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034128830] [2019-11-19 18:25:00,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 18:25:00,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:00,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 18:25:00,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 18:25:00,817 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-19 18:25:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:00,832 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-19 18:25:00,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 18:25:00,834 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-19 18:25:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:00,844 INFO L225 Difference]: With dead ends: 33 [2019-11-19 18:25:00,845 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 18:25:00,848 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 18:25:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 18:25:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-19 18:25:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-19 18:25:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-19 18:25:00,885 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-19 18:25:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:00,885 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-19 18:25:00,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 18:25:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-19 18:25:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 18:25:00,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:00,887 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:00,887 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:00,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:00,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-11-19 18:25:00,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:00,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313391893] [2019-11-19 18:25:00,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:00,908 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:00,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656275011] [2019-11-19 18:25:00,909 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 18:25:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:25:00,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 18:25:00,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:25:01,134 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 18:25:01,135 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2019-11-19 18:25:01,136 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 18:25:01,176 INFO L567 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2019-11-19 18:25:01,179 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 18:25:01,179 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2019-11-19 18:25:01,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:01,221 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 18:25:01,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313391893] [2019-11-19 18:25:01,222 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:25:01,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656275011] [2019-11-19 18:25:01,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:25:01,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 18:25:01,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308847537] [2019-11-19 18:25:01,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 18:25:01,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 18:25:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:25:01,227 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-19 18:25:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:01,333 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-19 18:25:01,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 18:25:01,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-19 18:25:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:01,334 INFO L225 Difference]: With dead ends: 32 [2019-11-19 18:25:01,335 INFO L226 Difference]: Without dead ends: 30 [2019-11-19 18:25:01,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:25:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-19 18:25:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2019-11-19 18:25:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 18:25:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-19 18:25:01,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2019-11-19 18:25:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:01,343 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-19 18:25:01,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 18:25:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-19 18:25:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 18:25:01,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:01,346 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:01,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:01,552 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash 130601367, now seen corresponding path program 1 times [2019-11-19 18:25:01,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:01,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550832678] [2019-11-19 18:25:01,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:01,580 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:01,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236325924] [2019-11-19 18:25:01,582 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 18:25:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:25:01,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 18:25:01,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:25:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:25:01,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550832678] [2019-11-19 18:25:01,694 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:25:01,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236325924] [2019-11-19 18:25:01,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:25:01,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 18:25:01,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003077500] [2019-11-19 18:25:01,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 18:25:01,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 18:25:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:25:01,698 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-11-19 18:25:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:01,812 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-19 18:25:01,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 18:25:01,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 18:25:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:01,815 INFO L225 Difference]: With dead ends: 47 [2019-11-19 18:25:01,815 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 18:25:01,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:25:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 18:25:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-11-19 18:25:01,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 18:25:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-19 18:25:01,830 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-19 18:25:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:01,830 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-19 18:25:01,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 18:25:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-19 18:25:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 18:25:01,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:01,834 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:02,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:02,041 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash 827904471, now seen corresponding path program 1 times [2019-11-19 18:25:02,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:02,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949636612] [2019-11-19 18:25:02,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:02,061 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:02,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132019781] [2019-11-19 18:25:02,062 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 18:25:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:25:02,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 18:25:02,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:25:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:25:02,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949636612] [2019-11-19 18:25:02,150 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:25:02,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132019781] [2019-11-19 18:25:02,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:25:02,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 18:25:02,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841984709] [2019-11-19 18:25:02,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 18:25:02,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 18:25:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 18:25:02,157 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-11-19 18:25:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:02,280 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-19 18:25:02,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 18:25:02,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 18:25:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:02,282 INFO L225 Difference]: With dead ends: 42 [2019-11-19 18:25:02,283 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 18:25:02,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:25:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 18:25:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2019-11-19 18:25:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 18:25:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-19 18:25:02,293 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-19 18:25:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:02,294 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-19 18:25:02,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 18:25:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-19 18:25:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 18:25:02,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:02,296 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:02,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:02,500 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash 437833903, now seen corresponding path program 1 times [2019-11-19 18:25:02,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:02,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435766927] [2019-11-19 18:25:02,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:02,525 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:02,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312988788] [2019-11-19 18:25:02,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:25:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:25:02,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 18:25:02,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:25:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:25:02,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435766927] [2019-11-19 18:25:02,639 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:25:02,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312988788] [2019-11-19 18:25:02,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 18:25:02,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-19 18:25:02,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278801368] [2019-11-19 18:25:02,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 18:25:02,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 18:25:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-19 18:25:02,643 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-19 18:25:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:02,774 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-19 18:25:02,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 18:25:02,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-19 18:25:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:02,779 INFO L225 Difference]: With dead ends: 39 [2019-11-19 18:25:02,779 INFO L226 Difference]: Without dead ends: 25 [2019-11-19 18:25:02,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-19 18:25:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-19 18:25:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2019-11-19 18:25:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 18:25:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-19 18:25:02,784 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-19 18:25:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:02,784 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-19 18:25:02,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 18:25:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-19 18:25:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 18:25:02,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:02,785 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:02,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:02,986 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:02,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:02,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1602337035, now seen corresponding path program 1 times [2019-11-19 18:25:02,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:02,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599650452] [2019-11-19 18:25:02,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:03,003 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:03,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796652477] [2019-11-19 18:25:03,004 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 18:25:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 18:25:03,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 18:25:03,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:25:03,081 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-19 18:25:03,082 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 18:25:03,090 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 18:25:03,096 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2019-11-19 18:25:03,096 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 18:25:03,104 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 18:25:03,105 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 18:25:03,105 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2019-11-19 18:25:03,184 INFO L343 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-11-19 18:25:03,185 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2019-11-19 18:25:03,187 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 18:25:03,218 INFO L567 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2019-11-19 18:25:03,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:03,222 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 18:25:03,222 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2019-11-19 18:25:03,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:03,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:03,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:03,292 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:03,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:03,363 INFO L392 ElimStorePlain]: Different costs {12=[v_prenex_4], 20=[|v_#memory_int_12|]} [2019-11-19 18:25:03,371 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 18:25:03,374 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-19 18:25:03,375 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2019-11-19 18:25:03,376 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 18:25:03,410 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 18:25:03,416 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 18:25:03,444 INFO L343 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-11-19 18:25:03,444 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 89 [2019-11-19 18:25:03,447 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 18:25:03,508 INFO L567 ElimStorePlain]: treesize reduction 51, result has 66.9 percent of original size [2019-11-19 18:25:03,510 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-11-19 18:25:03,510 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:103 [2019-11-19 18:25:03,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 18:25:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:25:03,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599650452] [2019-11-19 18:25:03,669 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:25:03,670 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796652477] [2019-11-19 18:25:03,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:25:03,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-19 18:25:03,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648991728] [2019-11-19 18:25:03,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 18:25:03,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:03,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 18:25:03,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-19 18:25:03,672 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2019-11-19 18:25:04,076 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-11-19 18:25:04,380 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2019-11-19 18:25:04,609 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-11-19 18:25:04,818 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-11-19 18:25:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:04,881 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-19 18:25:04,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 18:25:04,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-19 18:25:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:04,883 INFO L225 Difference]: With dead ends: 42 [2019-11-19 18:25:04,883 INFO L226 Difference]: Without dead ends: 40 [2019-11-19 18:25:04,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-19 18:25:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-19 18:25:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2019-11-19 18:25:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 18:25:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-19 18:25:04,891 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2019-11-19 18:25:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:04,891 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-19 18:25:04,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 18:25:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-19 18:25:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 18:25:04,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:04,892 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:05,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:05,100 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:05,101 INFO L82 PathProgramCache]: Analyzing trace with hash -602215277, now seen corresponding path program 2 times [2019-11-19 18:25:05,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:05,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814128733] [2019-11-19 18:25:05,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:05,123 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:05,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496729777] [2019-11-19 18:25:05,123 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 18:25:05,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 18:25:05,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:25:05,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 18:25:05,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:25:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:25:05,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814128733] [2019-11-19 18:25:05,229 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:25:05,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496729777] [2019-11-19 18:25:05,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:25:05,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 18:25:05,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767588038] [2019-11-19 18:25:05,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 18:25:05,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:05,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 18:25:05,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:25:05,231 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-19 18:25:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:05,347 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2019-11-19 18:25:05,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 18:25:05,349 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-19 18:25:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:05,349 INFO L225 Difference]: With dead ends: 59 [2019-11-19 18:25:05,350 INFO L226 Difference]: Without dead ends: 50 [2019-11-19 18:25:05,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-19 18:25:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-19 18:25:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2019-11-19 18:25:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 18:25:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-19 18:25:05,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2019-11-19 18:25:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:05,359 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-19 18:25:05,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 18:25:05,359 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-19 18:25:05,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 18:25:05,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:05,360 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:05,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:05,563 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash -508830509, now seen corresponding path program 3 times [2019-11-19 18:25:05,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:05,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924575647] [2019-11-19 18:25:05,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:05,577 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:05,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285734997] [2019-11-19 18:25:05,578 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:25:05,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 18:25:05,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 18:25:05,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 18:25:05,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 18:25:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 18:25:05,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924575647] [2019-11-19 18:25:05,661 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 18:25:05,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285734997] [2019-11-19 18:25:05,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 18:25:05,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 18:25:05,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004961857] [2019-11-19 18:25:05,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 18:25:05,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 18:25:05,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 18:25:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 18:25:05,663 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-11-19 18:25:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 18:25:05,760 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-19 18:25:05,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 18:25:05,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-19 18:25:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 18:25:05,761 INFO L225 Difference]: With dead ends: 54 [2019-11-19 18:25:05,761 INFO L226 Difference]: Without dead ends: 47 [2019-11-19 18:25:05,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-19 18:25:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-19 18:25:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-19 18:25:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 18:25:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-19 18:25:05,767 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2019-11-19 18:25:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 18:25:05,768 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-19 18:25:05,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 18:25:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-19 18:25:05,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 18:25:05,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 18:25:05,769 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 18:25:05,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:05,976 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 18:25:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 18:25:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash 575675563, now seen corresponding path program 1 times [2019-11-19 18:25:05,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 18:25:05,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639772774] [2019-11-19 18:25:05,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 18:25:05,989 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 18:25:05,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679129828] [2019-11-19 18:25:05,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:25:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 18:25:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 18:25:06,095 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 18:25:06,096 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 18:25:06,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 18:25:06,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:25:06 BoogieIcfgContainer [2019-11-19 18:25:06,358 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 18:25:06,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 18:25:06,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 18:25:06,359 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 18:25:06,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:25:00" (3/4) ... [2019-11-19 18:25:06,365 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 18:25:06,430 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 18:25:06,431 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 18:25:06,432 INFO L168 Benchmark]: Toolchain (without parser) took 6744.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.5 MB). Free memory was 963.1 MB in the beginning and 1.1 GB in the end (delta: -148.9 MB). Peak memory consumption was 45.6 MB. Max. memory is 11.5 GB. [2019-11-19 18:25:06,433 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 18:25:06,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.60 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 951.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-19 18:25:06,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -168.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 18:25:06,437 INFO L168 Benchmark]: Boogie Preprocessor took 25.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:25:06,438 INFO L168 Benchmark]: RCFGBuilder took 361.36 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: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-11-19 18:25:06,440 INFO L168 Benchmark]: TraceAbstraction took 5823.76 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -18.2 MB). Peak memory consumption was 52.0 MB. Max. memory is 11.5 GB. [2019-11-19 18:25:06,441 INFO L168 Benchmark]: Witness Printer took 72.10 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 18:25:06,448 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 352.60 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 951.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 102.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -168.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 361.36 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: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5823.76 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -18.2 MB). Peak memory consumption was 52.0 MB. Max. memory is 11.5 GB. * Witness Printer took 72.10 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] a[0] = 8 [L27] b[0] = 1 [L29] i=1 VAL [N=2] [L29] COND TRUE i