./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a88b43a3 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash e0f1c45558152fd199606f2551fe8da5ad92b45c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 64bit --witnessprinter.graph.data.programhash e0f1c45558152fd199606f2551fe8da5ad92b45c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-a88b43a [2019-11-20 12:10:08,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 12:10:08,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 12:10:08,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 12:10:08,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 12:10:08,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 12:10:08,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 12:10:08,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 12:10:08,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 12:10:08,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 12:10:08,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 12:10:08,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 12:10:08,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 12:10:08,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 12:10:08,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 12:10:08,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 12:10:08,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 12:10:08,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 12:10:08,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 12:10:08,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 12:10:08,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 12:10:08,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 12:10:08,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 12:10:08,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 12:10:08,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 12:10:08,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 12:10:08,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 12:10:08,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 12:10:08,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 12:10:08,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 12:10:08,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 12:10:08,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 12:10:08,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 12:10:08,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 12:10:08,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 12:10:08,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 12:10:08,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 12:10:08,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 12:10:08,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 12:10:08,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 12:10:08,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 12:10:08,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2019-11-20 12:10:08,858 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 12:10:08,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 12:10:08,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 12:10:08,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 12:10:08,861 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 12:10:08,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 12:10:08,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 12:10:08,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 12:10:08,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 12:10:08,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 12:10:08,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 12:10:08,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 12:10:08,863 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 12:10:08,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 12:10:08,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 12:10:08,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 12:10:08,864 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 12:10:08,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 12:10:08,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 12:10:08,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 12:10:08,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 12:10:08,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 12:10:08,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 12:10:08,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 12:10:08,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 12:10:08,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 12:10:08,867 INFO L138 SettingsManager]: * To the following directory=dump/ 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0f1c45558152fd199606f2551fe8da5ad92b45c [2019-11-20 12:10:09,219 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 12:10:09,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 12:10:09,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 12:10:09,239 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 12:10:09,240 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 12:10:09,241 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 12:10:09,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0387e1e5d/bef45f8ac03a4363b4a59463db3ce57a/FLAG14ecf21a1 [2019-11-20 12:10:09,793 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 12:10:09,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 12:10:09,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0387e1e5d/bef45f8ac03a4363b4a59463db3ce57a/FLAG14ecf21a1 [2019-11-20 12:10:10,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0387e1e5d/bef45f8ac03a4363b4a59463db3ce57a [2019-11-20 12:10:10,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 12:10:10,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 12:10:10,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 12:10:10,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 12:10:10,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 12:10:10,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@636c301f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10, skipping insertion in model container [2019-11-20 12:10:10,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,181 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 12:10:10,206 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 12:10:10,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 12:10:10,418 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 12:10:10,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 12:10:10,453 INFO L192 MainTranslator]: Completed translation [2019-11-20 12:10:10,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10 WrapperNode [2019-11-20 12:10:10,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 12:10:10,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 12:10:10,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 12:10:10,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 12:10:10,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 12:10:10,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 12:10:10,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 12:10:10,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 12:10:10,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (1/1) ... [2019-11-20 12:10:10,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 12:10:10,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 12:10:10,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 12:10:10,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 12:10:10,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (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 [2019-11-20 12:10:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 12:10:10,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 12:10:10,972 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 12:10:10,972 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-20 12:10:10,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:10:10 BoogieIcfgContainer [2019-11-20 12:10:10,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 12:10:10,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 12:10:10,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 12:10:10,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 12:10:10,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:10:10" (1/3) ... [2019-11-20 12:10:10,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263cf673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:10:10, skipping insertion in model container [2019-11-20 12:10:10,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:10:10" (2/3) ... [2019-11-20 12:10:10,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263cf673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:10:10, skipping insertion in model container [2019-11-20 12:10:10,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:10:10" (3/3) ... [2019-11-20 12:10:10,987 INFO L109 eAbstractionObserver]: Analyzing ICFG hard.c [2019-11-20 12:10:10,995 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 12:10:11,000 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-20 12:10:11,013 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-20 12:10:11,039 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 12:10:11,040 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 12:10:11,040 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 12:10:11,040 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 12:10:11,040 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 12:10:11,041 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 12:10:11,041 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 12:10:11,041 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 12:10:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-20 12:10:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-20 12:10:11,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:11,067 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-20 12:10:11,067 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:11,074 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-20 12:10:11,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:11,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492381980] [2019-11-20 12:10:11,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:11,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492381980] [2019-11-20 12:10:11,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:10:11,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 12:10:11,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729471819] [2019-11-20 12:10:11,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 12:10:11,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:11,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 12:10:11,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 12:10:11,271 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2019-11-20 12:10:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:11,413 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2019-11-20 12:10:11,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 12:10:11,415 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-20 12:10:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:11,427 INFO L225 Difference]: With dead ends: 92 [2019-11-20 12:10:11,427 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 12:10:11,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:10:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 12:10:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2019-11-20 12:10:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 12:10:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-20 12:10:11,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2019-11-20 12:10:11,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:11,475 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-20 12:10:11,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 12:10:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-20 12:10:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 12:10:11,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:11,475 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 12:10:11,476 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:11,477 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-11-20 12:10:11,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:11,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070507528] [2019-11-20 12:10:11,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:11,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070507528] [2019-11-20 12:10:11,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:10:11,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 12:10:11,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349780029] [2019-11-20 12:10:11,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 12:10:11,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:11,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 12:10:11,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 12:10:11,537 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 4 states. [2019-11-20 12:10:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:11,621 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-11-20 12:10:11,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 12:10:11,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-20 12:10:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:11,624 INFO L225 Difference]: With dead ends: 49 [2019-11-20 12:10:11,624 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 12:10:11,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:10:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 12:10:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-20 12:10:11,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 12:10:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-20 12:10:11,634 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 6 [2019-11-20 12:10:11,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:11,634 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-20 12:10:11,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 12:10:11,634 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-20 12:10:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 12:10:11,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:11,635 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:10:11,636 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:11,636 INFO L82 PathProgramCache]: Analyzing trace with hash 756072562, now seen corresponding path program 1 times [2019-11-20 12:10:11,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:11,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935562072] [2019-11-20 12:10:11,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:11,648 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:11,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025233665] [2019-11-20 12:10:11,649 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 [2019-11-20 12:10:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:11,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 12:10:11,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:11,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935562072] [2019-11-20 12:10:11,764 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:11,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025233665] [2019-11-20 12:10:11,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:10:11,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 12:10:11,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583168283] [2019-11-20 12:10:11,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 12:10:11,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 12:10:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 12:10:11,768 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 4 states. [2019-11-20 12:10:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:11,904 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2019-11-20 12:10:11,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 12:10:11,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-20 12:10:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:11,907 INFO L225 Difference]: With dead ends: 69 [2019-11-20 12:10:11,907 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 12:10:11,908 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:10:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 12:10:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2019-11-20 12:10:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 12:10:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-20 12:10:11,936 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 8 [2019-11-20 12:10:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:11,937 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-20 12:10:11,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 12:10:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-20 12:10:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 12:10:11,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:11,939 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:10:12,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:12,143 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1354107943, now seen corresponding path program 1 times [2019-11-20 12:10:12,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:12,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552340613] [2019-11-20 12:10:12,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:12,155 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:12,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817113135] [2019-11-20 12:10:12,155 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) [2019-11-20 12:10:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:12,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 12:10:12,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:12,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:12,221 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552340613] [2019-11-20 12:10:12,221 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:12,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817113135] [2019-11-20 12:10:12,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:10:12,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 12:10:12,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267143168] [2019-11-20 12:10:12,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 12:10:12,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:12,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 12:10:12,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 12:10:12,225 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 4 states. [2019-11-20 12:10:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:12,325 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-11-20 12:10:12,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 12:10:12,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 12:10:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:12,327 INFO L225 Difference]: With dead ends: 60 [2019-11-20 12:10:12,327 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 12:10:12,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:10:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 12:10:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2019-11-20 12:10:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 12:10:12,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-11-20 12:10:12,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2019-11-20 12:10:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:12,346 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-11-20 12:10:12,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 12:10:12,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-11-20 12:10:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 12:10:12,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:12,349 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 12:10:12,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:12,553 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1240091547, now seen corresponding path program 1 times [2019-11-20 12:10:12,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:12,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351561390] [2019-11-20 12:10:12,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:12,565 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:12,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339192709] [2019-11-20 12:10:12,566 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 [2019-11-20 12:10:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:12,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 12:10:12,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:12,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:12,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351561390] [2019-11-20 12:10:12,653 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:12,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339192709] [2019-11-20 12:10:12,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:12,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-20 12:10:12,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895796968] [2019-11-20 12:10:12,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 12:10:12,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:12,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 12:10:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:10:12,656 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 5 states. [2019-11-20 12:10:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:12,815 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2019-11-20 12:10:12,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 12:10:12,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-20 12:10:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:12,817 INFO L225 Difference]: With dead ends: 105 [2019-11-20 12:10:12,817 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 12:10:12,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 12:10:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 12:10:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2019-11-20 12:10:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-20 12:10:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-11-20 12:10:12,840 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 15 [2019-11-20 12:10:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:12,841 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-11-20 12:10:12,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 12:10:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-11-20 12:10:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 12:10:12,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:12,842 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2019-11-20 12:10:13,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:13,050 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:13,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1654747054, now seen corresponding path program 2 times [2019-11-20 12:10:13,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:13,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392168388] [2019-11-20 12:10:13,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:13,061 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:13,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935727975] [2019-11-20 12:10:13,061 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 [2019-11-20 12:10:13,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 12:10:13,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 12:10:13,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 12:10:13,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:13,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:13,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392168388] [2019-11-20 12:10:13,181 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:13,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935727975] [2019-11-20 12:10:13,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:13,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-20 12:10:13,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596985401] [2019-11-20 12:10:13,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 12:10:13,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:13,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 12:10:13,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 12:10:13,185 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 6 states. [2019-11-20 12:10:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:13,404 INFO L93 Difference]: Finished difference Result 139 states and 164 transitions. [2019-11-20 12:10:13,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 12:10:13,406 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-20 12:10:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:13,408 INFO L225 Difference]: With dead ends: 139 [2019-11-20 12:10:13,408 INFO L226 Difference]: Without dead ends: 102 [2019-11-20 12:10:13,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-20 12:10:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-20 12:10:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2019-11-20 12:10:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 12:10:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-11-20 12:10:13,433 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 22 [2019-11-20 12:10:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:13,434 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-11-20 12:10:13,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 12:10:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-11-20 12:10:13,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 12:10:13,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:13,437 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:10:13,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:13,640 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1585354123, now seen corresponding path program 1 times [2019-11-20 12:10:13,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:13,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088095423] [2019-11-20 12:10:13,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:13,652 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:13,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278956693] [2019-11-20 12:10:13,653 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 [2019-11-20 12:10:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:13,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 12:10:13,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:13,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:13,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088095423] [2019-11-20 12:10:13,788 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:13,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278956693] [2019-11-20 12:10:13,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:13,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-20 12:10:13,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578107299] [2019-11-20 12:10:13,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 12:10:13,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 12:10:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 12:10:13,790 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 6 states. [2019-11-20 12:10:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:13,978 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2019-11-20 12:10:13,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 12:10:13,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-20 12:10:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:13,980 INFO L225 Difference]: With dead ends: 99 [2019-11-20 12:10:13,980 INFO L226 Difference]: Without dead ends: 97 [2019-11-20 12:10:13,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-20 12:10:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-20 12:10:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 90. [2019-11-20 12:10:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-20 12:10:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2019-11-20 12:10:13,993 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 24 [2019-11-20 12:10:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:13,994 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2019-11-20 12:10:13,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 12:10:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2019-11-20 12:10:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 12:10:13,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:13,995 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:10:14,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:14,205 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1185426063, now seen corresponding path program 1 times [2019-11-20 12:10:14,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:14,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407009342] [2019-11-20 12:10:14,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:14,217 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:14,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276446889] [2019-11-20 12:10:14,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-20 12:10:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:14,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 12:10:14,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 12:10:14,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407009342] [2019-11-20 12:10:14,302 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:14,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276446889] [2019-11-20 12:10:14,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:14,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-20 12:10:14,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724972493] [2019-11-20 12:10:14,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 12:10:14,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 12:10:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 12:10:14,304 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 6 states. [2019-11-20 12:10:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:14,457 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2019-11-20 12:10:14,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 12:10:14,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-20 12:10:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:14,459 INFO L225 Difference]: With dead ends: 120 [2019-11-20 12:10:14,459 INFO L226 Difference]: Without dead ends: 105 [2019-11-20 12:10:14,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-20 12:10:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-20 12:10:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2019-11-20 12:10:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 12:10:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2019-11-20 12:10:14,473 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 29 [2019-11-20 12:10:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:14,473 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2019-11-20 12:10:14,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 12:10:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2019-11-20 12:10:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 12:10:14,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:14,475 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1] [2019-11-20 12:10:14,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:14,684 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1363992507, now seen corresponding path program 3 times [2019-11-20 12:10:14,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:14,685 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986489554] [2019-11-20 12:10:14,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:14,699 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:14,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945256198] [2019-11-20 12:10:14,700 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 [2019-11-20 12:10:14,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-20 12:10:14,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 12:10:14,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 12:10:14,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:14,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:14,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 12:10:14,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986489554] [2019-11-20 12:10:14,924 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:14,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945256198] [2019-11-20 12:10:14,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:14,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-20 12:10:14,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702603435] [2019-11-20 12:10:14,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 12:10:14,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 12:10:14,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 12:10:14,926 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand 7 states. [2019-11-20 12:10:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:15,263 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2019-11-20 12:10:15,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 12:10:15,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-20 12:10:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:15,267 INFO L225 Difference]: With dead ends: 113 [2019-11-20 12:10:15,267 INFO L226 Difference]: Without dead ends: 103 [2019-11-20 12:10:15,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-20 12:10:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-20 12:10:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-20 12:10:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-20 12:10:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2019-11-20 12:10:15,280 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 29 [2019-11-20 12:10:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:15,281 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2019-11-20 12:10:15,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 12:10:15,281 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2019-11-20 12:10:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 12:10:15,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:15,282 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:10:15,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:15,494 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -803819852, now seen corresponding path program 2 times [2019-11-20 12:10:15,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:15,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619784291] [2019-11-20 12:10:15,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:15,511 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:15,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085881932] [2019-11-20 12:10:15,512 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 [2019-11-20 12:10:15,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 12:10:15,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 12:10:15,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-20 12:10:15,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:15,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:15,636 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619784291] [2019-11-20 12:10:15,636 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:15,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085881932] [2019-11-20 12:10:15,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:15,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-20 12:10:15,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659160357] [2019-11-20 12:10:15,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 12:10:15,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 12:10:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 12:10:15,639 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 7 states. [2019-11-20 12:10:15,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:15,885 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2019-11-20 12:10:15,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 12:10:15,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-11-20 12:10:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:15,887 INFO L225 Difference]: With dead ends: 113 [2019-11-20 12:10:15,887 INFO L226 Difference]: Without dead ends: 111 [2019-11-20 12:10:15,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 12:10:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-20 12:10:15,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2019-11-20 12:10:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-20 12:10:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2019-11-20 12:10:15,900 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 31 [2019-11-20 12:10:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:15,901 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2019-11-20 12:10:15,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 12:10:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2019-11-20 12:10:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 12:10:15,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:15,903 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-20 12:10:16,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:16,111 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:16,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1656121185, now seen corresponding path program 3 times [2019-11-20 12:10:16,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:16,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102681694] [2019-11-20 12:10:16,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:16,121 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:16,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834433202] [2019-11-20 12:10:16,121 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:16,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 12:10:16,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 12:10:16,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-20 12:10:16,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:16,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:16,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102681694] [2019-11-20 12:10:16,531 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:16,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834433202] [2019-11-20 12:10:16,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:16,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-20 12:10:16,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447872122] [2019-11-20 12:10:16,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 12:10:16,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:16,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 12:10:16,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-20 12:10:16,533 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 9 states. [2019-11-20 12:10:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:16,951 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2019-11-20 12:10:16,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 12:10:16,952 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-20 12:10:16,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:16,953 INFO L225 Difference]: With dead ends: 115 [2019-11-20 12:10:16,953 INFO L226 Difference]: Without dead ends: 104 [2019-11-20 12:10:16,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-11-20 12:10:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-20 12:10:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-11-20 12:10:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-20 12:10:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2019-11-20 12:10:16,963 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 37 [2019-11-20 12:10:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:16,963 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2019-11-20 12:10:16,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 12:10:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2019-11-20 12:10:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 12:10:16,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:16,965 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 12:10:17,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:17,168 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1263094175, now seen corresponding path program 1 times [2019-11-20 12:10:17,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:17,169 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746227434] [2019-11-20 12:10:17,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:17,176 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:17,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678659] [2019-11-20 12:10:17,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-20 12:10:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:10:17,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 12:10:17,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:17,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:17,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 12:10:17,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746227434] [2019-11-20 12:10:17,330 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:17,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678659] [2019-11-20 12:10:17,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:10:17,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 12:10:17,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930498245] [2019-11-20 12:10:17,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 12:10:17,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:17,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 12:10:17,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-20 12:10:17,332 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 6 states. [2019-11-20 12:10:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:10:28,165 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2019-11-20 12:10:28,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 12:10:28,165 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-20 12:10:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:10:28,167 INFO L225 Difference]: With dead ends: 146 [2019-11-20 12:10:28,167 INFO L226 Difference]: Without dead ends: 103 [2019-11-20 12:10:28,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-20 12:10:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-20 12:10:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2019-11-20 12:10:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 12:10:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2019-11-20 12:10:28,176 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 37 [2019-11-20 12:10:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:10:28,177 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2019-11-20 12:10:28,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 12:10:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2019-11-20 12:10:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 12:10:28,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:10:28,178 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:10:28,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:10:28,389 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:10:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:10:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2081381013, now seen corresponding path program 4 times [2019-11-20 12:10:28,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 12:10:28,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651078991] [2019-11-20 12:10:28,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 12:10:28,399 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-20 12:10:28,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823277541] [2019-11-20 12:10:28,408 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-20 12:10:28,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 12:10:28,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 12:10:28,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-20 12:10:28,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:10:28,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:28,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:28,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:29,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:48,353 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-20 12:10:59,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:10:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:10:59,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651078991] [2019-11-20 12:10:59,726 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-20 12:10:59,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823277541] [2019-11-20 12:10:59,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-20 12:10:59,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-20 12:10:59,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354556453] [2019-11-20 12:10:59,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 12:10:59,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 12:10:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 12:10:59,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=142, Unknown=15, NotChecked=0, Total=210 [2019-11-20 12:10:59,729 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 15 states. [2019-11-20 12:11:29,753 WARN L192 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2019-11-20 12:11:44,799 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2019-11-20 12:12:12,836 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2019-11-20 12:12:13,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 12:12:13,038 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:100) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.pop(ManagedScript.java:130) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:660) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:264) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:279) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:161) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:714) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:627) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:454) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 30 more [2019-11-20 12:12:13,051 INFO L168 Benchmark]: Toolchain (without parser) took 122883.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 206.6 MB). Free memory was 955.0 MB in the beginning and 846.9 MB in the end (delta: 108.1 MB). Peak memory consumption was 314.7 MB. Max. memory is 11.5 GB. [2019-11-20 12:12:13,052 INFO L168 Benchmark]: CDTParser took 0.26 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. [2019-11-20 12:12:13,052 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.45 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 942.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-20 12:12:13,053 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.31 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 12:12:13,053 INFO L168 Benchmark]: Boogie Preprocessor took 90.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -195.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-20 12:12:13,056 INFO L168 Benchmark]: RCFGBuilder took 391.43 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: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. [2019-11-20 12:12:13,057 INFO L168 Benchmark]: TraceAbstraction took 122068.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 846.9 MB in the end (delta: 267.9 MB). Peak memory consumption was 326.1 MB. Max. memory is 11.5 GB. [2019-11-20 12:12:13,066 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 289.45 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 942.9 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 37.31 ms. Allocated memory is still 1.0 GB. Free memory is still 942.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 90.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 942.9 MB in the beginning and 1.1 GB in the end (delta: -195.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 391.43 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: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 122068.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.2 MB). Free memory was 1.1 GB in the beginning and 846.9 MB in the end (delta: 267.9 MB). Peak memory consumption was 326.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-a88b43a [2019-11-20 12:12:14,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 12:12:14,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 12:12:14,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 12:12:14,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 12:12:14,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 12:12:14,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 12:12:14,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 12:12:14,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 12:12:14,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 12:12:14,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 12:12:14,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 12:12:14,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 12:12:14,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 12:12:14,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 12:12:14,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 12:12:14,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 12:12:14,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 12:12:14,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 12:12:14,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 12:12:14,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 12:12:14,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 12:12:14,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 12:12:15,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 12:12:15,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 12:12:15,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 12:12:15,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 12:12:15,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 12:12:15,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 12:12:15,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 12:12:15,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 12:12:15,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 12:12:15,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 12:12:15,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 12:12:15,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 12:12:15,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 12:12:15,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 12:12:15,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 12:12:15,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 12:12:15,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 12:12:15,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 12:12:15,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2019-11-20 12:12:15,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 12:12:15,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 12:12:15,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 12:12:15,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 12:12:15,058 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 12:12:15,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 12:12:15,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 12:12:15,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 12:12:15,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 12:12:15,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 12:12:15,061 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 12:12:15,061 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 12:12:15,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 12:12:15,062 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 12:12:15,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 12:12:15,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 12:12:15,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 12:12:15,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 12:12:15,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 12:12:15,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 12:12:15,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 12:12:15,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 12:12:15,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 12:12:15,065 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 12:12:15,065 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 12:12:15,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 12:12:15,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 12:12:15,066 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2019-11-20 12:12:15,066 INFO L138 SettingsManager]: * To the following directory=dump/ 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0f1c45558152fd199606f2551fe8da5ad92b45c [2019-11-20 12:12:15,381 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 12:12:15,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 12:12:15,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 12:12:15,404 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 12:12:15,404 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 12:12:15,405 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 12:12:15,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ceb787d8/ac5292bbffb344b2a1ebb3403d4a6eb7/FLAGcbfe39373 [2019-11-20 12:12:15,967 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 12:12:15,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard.c [2019-11-20 12:12:15,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ceb787d8/ac5292bbffb344b2a1ebb3403d4a6eb7/FLAGcbfe39373 [2019-11-20 12:12:16,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ceb787d8/ac5292bbffb344b2a1ebb3403d4a6eb7 [2019-11-20 12:12:16,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 12:12:16,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 12:12:16,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 12:12:16,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 12:12:16,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 12:12:16,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441e2110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16, skipping insertion in model container [2019-11-20 12:12:16,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,347 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 12:12:16,369 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 12:12:16,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 12:12:16,543 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 12:12:16,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 12:12:16,580 INFO L192 MainTranslator]: Completed translation [2019-11-20 12:12:16,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16 WrapperNode [2019-11-20 12:12:16,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 12:12:16,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 12:12:16,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 12:12:16,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 12:12:16,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 12:12:16,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 12:12:16,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 12:12:16,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 12:12:16,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (1/1) ... [2019-11-20 12:12:16,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 12:12:16,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 12:12:16,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 12:12:16,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 12:12:16,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (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 [2019-11-20 12:12:16,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 12:12:16,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 12:12:17,138 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 12:12:17,138 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-20 12:12:17,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:12:17 BoogieIcfgContainer [2019-11-20 12:12:17,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 12:12:17,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 12:12:17,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 12:12:17,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 12:12:17,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:12:16" (1/3) ... [2019-11-20 12:12:17,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6292d790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:12:17, skipping insertion in model container [2019-11-20 12:12:17,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:12:16" (2/3) ... [2019-11-20 12:12:17,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6292d790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:12:17, skipping insertion in model container [2019-11-20 12:12:17,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:12:17" (3/3) ... [2019-11-20 12:12:17,148 INFO L109 eAbstractionObserver]: Analyzing ICFG hard.c [2019-11-20 12:12:17,157 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 12:12:17,165 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-20 12:12:17,176 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-20 12:12:17,202 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 12:12:17,202 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 12:12:17,203 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 12:12:17,203 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 12:12:17,203 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 12:12:17,203 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 12:12:17,203 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 12:12:17,203 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 12:12:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-20 12:12:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-20 12:12:17,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:12:17,228 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-20 12:12:17,228 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:12:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:12:17,235 INFO L82 PathProgramCache]: Analyzing trace with hash 963340, now seen corresponding path program 1 times [2019-11-20 12:12:17,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:12:17,246 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [999022996] [2019-11-20 12:12:17,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:12:17,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 12:12:17,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:12:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:17,367 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:12:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:17,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [999022996] [2019-11-20 12:12:17,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:12:17,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 12:12:17,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496545093] [2019-11-20 12:12:17,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 12:12:17,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:12:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 12:12:17,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:12:17,411 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2019-11-20 12:12:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:12:17,667 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2019-11-20 12:12:17,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 12:12:17,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2019-11-20 12:12:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:12:17,680 INFO L225 Difference]: With dead ends: 92 [2019-11-20 12:12:17,680 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 12:12:17,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 12:12:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 12:12:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2019-11-20 12:12:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 12:12:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-11-20 12:12:17,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 4 [2019-11-20 12:12:17,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:12:17,728 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-11-20 12:12:17,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 12:12:17,728 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-11-20 12:12:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-20 12:12:17,729 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:12:17,729 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-20 12:12:17,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:17,932 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:12:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:12:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash 925925231, now seen corresponding path program 1 times [2019-11-20 12:12:17,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:12:17,934 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1545069689] [2019-11-20 12:12:17,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:12:18,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 12:12:18,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:12:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:18,022 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:12:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:18,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545069689] [2019-11-20 12:12:18,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:12:18,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 12:12:18,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447313538] [2019-11-20 12:12:18,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 12:12:18,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:12:18,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 12:12:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:12:18,038 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2019-11-20 12:12:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:12:18,251 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-11-20 12:12:18,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 12:12:18,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-20 12:12:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:12:18,253 INFO L225 Difference]: With dead ends: 49 [2019-11-20 12:12:18,253 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 12:12:18,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 12:12:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 12:12:18,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-20 12:12:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 12:12:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-20 12:12:18,263 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 6 [2019-11-20 12:12:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:12:18,263 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-20 12:12:18,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 12:12:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-20 12:12:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 12:12:18,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:12:18,264 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:12:18,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:18,470 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:12:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:12:18,471 INFO L82 PathProgramCache]: Analyzing trace with hash 756072562, now seen corresponding path program 1 times [2019-11-20 12:12:18,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:12:18,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1243056569] [2019-11-20 12:12:18,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:12:18,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 12:12:18,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:12:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:18,581 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:12:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:18,660 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1243056569] [2019-11-20 12:12:18,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:12:18,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 12:12:18,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76029825] [2019-11-20 12:12:18,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 12:12:18,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:12:18,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 12:12:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 12:12:18,662 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2019-11-20 12:12:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:12:21,595 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-20 12:12:21,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 12:12:21,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2019-11-20 12:12:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:12:21,598 INFO L225 Difference]: With dead ends: 85 [2019-11-20 12:12:21,598 INFO L226 Difference]: Without dead ends: 63 [2019-11-20 12:12:21,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 12:12:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-20 12:12:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2019-11-20 12:12:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 12:12:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-20 12:12:21,615 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 8 [2019-11-20 12:12:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:12:21,615 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-20 12:12:21,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 12:12:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-20 12:12:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 12:12:21,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:12:21,616 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:12:21,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:21,822 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:12:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:12:21,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1354107943, now seen corresponding path program 1 times [2019-11-20 12:12:21,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:12:21,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1702200862] [2019-11-20 12:12:21,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:12:21,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 12:12:21,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:12:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:21,989 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:12:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:22,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1702200862] [2019-11-20 12:12:22,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 12:12:22,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 12:12:22,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923522910] [2019-11-20 12:12:22,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 12:12:22,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:12:22,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 12:12:22,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 12:12:22,036 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 5 states. [2019-11-20 12:12:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:12:22,277 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-11-20 12:12:22,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 12:12:22,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 12:12:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:12:22,278 INFO L225 Difference]: With dead ends: 72 [2019-11-20 12:12:22,279 INFO L226 Difference]: Without dead ends: 61 [2019-11-20 12:12:22,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 12:12:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-20 12:12:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2019-11-20 12:12:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-20 12:12:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2019-11-20 12:12:22,290 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2019-11-20 12:12:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:12:22,291 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2019-11-20 12:12:22,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 12:12:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2019-11-20 12:12:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 12:12:22,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:12:22,292 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2019-11-20 12:12:22,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:22,505 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:12:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:12:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1654747054, now seen corresponding path program 1 times [2019-11-20 12:12:22,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:12:22,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1318912867] [2019-11-20 12:12:22,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:12:22,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 12:12:22,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:12:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:22,746 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:12:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 2 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:25,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1318912867] [2019-11-20 12:12:25,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 12:12:25,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 12:12:25,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227855351] [2019-11-20 12:12:25,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 12:12:25,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:12:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 12:12:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=60, Unknown=1, NotChecked=0, Total=90 [2019-11-20 12:12:25,197 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 10 states. [2019-11-20 12:12:28,629 WARN L192 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 12:12:30,943 WARN L192 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 14 [2019-11-20 12:12:33,376 WARN L192 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 18 [2019-11-20 12:12:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:12:37,372 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2019-11-20 12:12:37,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 12:12:37,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-20 12:12:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:12:37,375 INFO L225 Difference]: With dead ends: 112 [2019-11-20 12:12:37,375 INFO L226 Difference]: Without dead ends: 98 [2019-11-20 12:12:37,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=142, Invalid=277, Unknown=1, NotChecked=0, Total=420 [2019-11-20 12:12:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-20 12:12:37,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 46. [2019-11-20 12:12:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-20 12:12:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-11-20 12:12:37,388 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2019-11-20 12:12:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:12:37,388 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-11-20 12:12:37,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 12:12:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-11-20 12:12:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 12:12:37,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:12:37,390 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:12:37,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:37,591 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:12:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:12:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1585354123, now seen corresponding path program 1 times [2019-11-20 12:12:37,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:12:37,593 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [788048417] [2019-11-20 12:12:37,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:12:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:12:37,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 12:12:37,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:12:38,244 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 12:12:38,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:12:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:38,746 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:12:41,101 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2019-11-20 12:12:42,657 WARN L192 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 12:12:44,468 WARN L192 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 12:12:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:12:44,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [788048417] [2019-11-20 12:12:44,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 12:12:44,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-20 12:12:44,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943585097] [2019-11-20 12:12:44,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 12:12:44,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:12:44,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 12:12:44,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-20 12:12:44,477 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 14 states. [2019-11-20 12:12:48,555 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 12:12:50,500 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2019-11-20 12:12:52,103 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 12:12:53,257 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-11-20 12:12:59,829 WARN L192 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 12:13:05,482 WARN L192 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 34 [2019-11-20 12:13:17,513 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 12:13:24,147 WARN L192 SmtUtils]: Spent 3.25 s on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 12:13:26,785 WARN L192 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 12:13:32,906 WARN L192 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-20 12:13:37,079 WARN L192 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-11-20 12:13:44,824 WARN L192 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-20 12:13:47,989 WARN L192 SmtUtils]: Spent 994.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 12:13:53,563 WARN L192 SmtUtils]: Spent 950.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-20 12:13:55,551 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-20 12:13:57,381 WARN L192 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 12:13:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:13:59,714 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2019-11-20 12:13:59,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 12:13:59,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2019-11-20 12:13:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:13:59,743 INFO L225 Difference]: With dead ends: 153 [2019-11-20 12:13:59,743 INFO L226 Difference]: Without dead ends: 127 [2019-11-20 12:13:59,745 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 12:13:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-20 12:13:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 69. [2019-11-20 12:13:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-20 12:13:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-11-20 12:13:59,759 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 24 [2019-11-20 12:13:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:13:59,760 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-11-20 12:13:59,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 12:13:59,760 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-11-20 12:13:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 12:13:59,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:13:59,761 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:13:59,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:13:59,974 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:13:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:13:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1185426063, now seen corresponding path program 1 times [2019-11-20 12:13:59,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:13:59,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [811129610] [2019-11-20 12:13:59,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:14:00,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 12:14:00,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:14:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 12:14:00,331 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:14:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 12:14:00,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [811129610] [2019-11-20 12:14:00,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 12:14:00,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-20 12:14:00,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375373932] [2019-11-20 12:14:00,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 12:14:00,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:14:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 12:14:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 12:14:00,848 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 9 states. [2019-11-20 12:14:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:14:01,689 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2019-11-20 12:14:01,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 12:14:01,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-11-20 12:14:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:14:01,693 INFO L225 Difference]: With dead ends: 93 [2019-11-20 12:14:01,693 INFO L226 Difference]: Without dead ends: 91 [2019-11-20 12:14:01,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2019-11-20 12:14:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-20 12:14:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2019-11-20 12:14:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 12:14:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2019-11-20 12:14:01,708 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 29 [2019-11-20 12:14:01,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:14:01,708 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2019-11-20 12:14:01,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 12:14:01,709 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2019-11-20 12:14:01,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 12:14:01,710 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:14:01,710 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2019-11-20 12:14:01,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:01,921 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:14:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:14:01,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1904897800, now seen corresponding path program 2 times [2019-11-20 12:14:01,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:14:01,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [458928952] [2019-11-20 12:14:01,924 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:02,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 12:14:02,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 12:14:02,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 12:14:02,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:14:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:14:02,250 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:14:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:14:02,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458928952] [2019-11-20 12:14:02,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 12:14:02,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 5 [2019-11-20 12:14:02,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900641645] [2019-11-20 12:14:02,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 12:14:02,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:14:02,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 12:14:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 12:14:02,530 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 6 states. [2019-11-20 12:14:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:14:02,845 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2019-11-20 12:14:02,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 12:14:02,846 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-20 12:14:02,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:14:02,847 INFO L225 Difference]: With dead ends: 93 [2019-11-20 12:14:02,847 INFO L226 Difference]: Without dead ends: 69 [2019-11-20 12:14:02,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 12:14:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-20 12:14:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-20 12:14:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-20 12:14:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2019-11-20 12:14:02,860 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 30 [2019-11-20 12:14:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:14:02,861 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2019-11-20 12:14:02,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 12:14:02,861 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2019-11-20 12:14:02,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 12:14:02,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:14:02,863 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:14:03,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:03,067 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:14:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:14:03,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1028271282, now seen corresponding path program 1 times [2019-11-20 12:14:03,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:14:03,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1381986969] [2019-11-20 12:14:03,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 12:14:03,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 12:14:03,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 12:14:03,986 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2019-11-20 12:14:03,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 12:14:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:14:04,322 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 12:14:06,820 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2019-11-20 12:14:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 12:14:06,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1381986969] [2019-11-20 12:14:06,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 12:14:06,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 12:14:06,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132956841] [2019-11-20 12:14:06,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 12:14:06,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 12:14:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 12:14:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-20 12:14:06,830 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 12 states. [2019-11-20 12:14:10,805 WARN L192 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2019-11-20 12:14:12,084 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2019-11-20 12:14:16,417 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2019-11-20 12:14:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 12:14:16,492 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-20 12:14:16,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 12:14:16,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-11-20 12:14:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 12:14:16,493 INFO L225 Difference]: With dead ends: 75 [2019-11-20 12:14:16,493 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 12:14:16,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2019-11-20 12:14:16,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 12:14:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-20 12:14:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-20 12:14:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-20 12:14:16,503 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 31 [2019-11-20 12:14:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 12:14:16,503 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-20 12:14:16,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 12:14:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-20 12:14:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 12:14:16,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 12:14:16,505 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 12:14:16,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:16,709 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 12:14:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 12:14:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash -803819852, now seen corresponding path program 3 times [2019-11-20 12:14:16,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 12:14:16,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [882278996] [2019-11-20 12:14:16,716 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:17,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 12:14:17,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-20 12:14:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 12:14:17,447 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 12:14:17,447 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 12:14:17,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 12:14:17,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:14:17 BoogieIcfgContainer [2019-11-20 12:14:17,677 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 12:14:17,677 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 12:14:17,677 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 12:14:17,677 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 12:14:17,678 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:12:17" (3/4) ... [2019-11-20 12:14:17,680 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 12:14:17,734 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-20 12:14:17,734 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 12:14:17,735 INFO L168 Benchmark]: Toolchain (without parser) took 121405.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 198.2 MB). Free memory was 957.7 MB in the beginning and 924.1 MB in the end (delta: 33.6 MB). Peak memory consumption was 231.8 MB. Max. memory is 11.5 GB. [2019-11-20 12:14:17,737 INFO L168 Benchmark]: CDTParser took 0.29 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. [2019-11-20 12:14:17,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.77 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 945.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-20 12:14:17,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-20 12:14:17,745 INFO L168 Benchmark]: Boogie Preprocessor took 25.91 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-20 12:14:17,745 INFO L168 Benchmark]: RCFGBuilder took 426.82 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-11-20 12:14:17,746 INFO L168 Benchmark]: TraceAbstraction took 120535.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.7 MB). Free memory was 1.1 GB in the beginning and 924.1 MB in the end (delta: 186.1 MB). Peak memory consumption was 244.8 MB. Max. memory is 11.5 GB. [2019-11-20 12:14:17,746 INFO L168 Benchmark]: Witness Printer took 56.84 ms. Allocated memory is still 1.2 GB. Free memory is still 924.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 12:14:17,749 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 249.77 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 945.6 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 104.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -190.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.91 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 426.82 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: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 120535.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 58.7 MB). Free memory was 1.1 GB in the beginning and 924.1 MB in the end (delta: 186.1 MB). Peak memory consumption was 244.8 MB. Max. memory is 11.5 GB. * Witness Printer took 56.84 ms. Allocated memory is still 1.2 GB. Free memory is still 924.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int A, B; [L19] int r, d, p, q; [L20] A = __VERIFIER_nondet_int() [L21] B = __VERIFIER_nondet_int() [L24] r = A [L25] d = B [L26] p = 1 [L27] q = 0 [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND FALSE !(!(r >= d)) [L35] d = 2 * d [L36] p = 2 * p [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND FALSE !(!(r >= d)) [L35] d = 2 * d [L36] p = 2 * p [L29] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L33] COND TRUE !(r >= d) [L39] COND TRUE 1 [L10] COND FALSE !(!(cond)) [L10] COND FALSE !(!(cond)) [L43] COND FALSE !(!(p != 1)) [L45] d = d / 2 [L46] p = p / 2 [L47] COND TRUE r >= d [L48] r = r - d [L49] q = q + p [L39] COND TRUE 1 [L10] COND TRUE !(cond) [L12] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 7 error locations. Result: UNSAFE, OverallTime: 120.4s, OverallIterations: 10, TraceHistogramMax: 3, AutomataDifference: 101.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 217 SDtfs, 504 SDslu, 557 SDs, 0 SdLazy, 831 SolverSat, 356 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 44.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 67.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, 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, 9 MinimizatonAttempts, 179 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 13.9s InterpolantComputationTime, 196 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 312 ConstructedInterpolants, 21 QuantifiedInterpolants, 68288 SizeOfPredicates, 47 NumberOfNonLiveVariables, 331 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 34/138 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...