./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-token-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c 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/forester-heap/dll-token-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 35a5ccff58935eefedf723cd2243fac7c8b8e61b .......................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-11-28 16:58:49,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:58:49,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:58:49,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:58:49,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:58:49,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:58:49,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:58:49,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:58:49,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:58:49,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:58:49,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:58:49,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:58:49,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:58:49,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:58:49,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:58:49,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:58:49,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:58:49,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:58:49,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:58:49,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:58:49,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:58:49,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:58:49,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:58:49,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:58:49,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:58:49,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:58:49,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:58:49,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:58:49,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:58:49,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:58:49,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:58:49,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:58:49,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:58:49,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:58:49,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:58:49,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:58:49,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:58:49,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:58:49,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:58:49,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:58:49,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:58:49,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:58:49,843 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:58:49,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:58:49,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:58:49,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:58:49,845 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:58:49,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:58:49,846 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:58:49,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:58:49,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:58:49,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:58:49,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:58:49,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:58:49,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:58:49,847 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:58:49,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:58:49,848 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:58:49,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:58:49,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:58:49,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:58:49,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:58:49,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:58:49,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:58:49,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:58:49,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:58:49,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:58:49,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:58:49,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:58:49,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:58:49,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:58:49,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35a5ccff58935eefedf723cd2243fac7c8b8e61b [2019-11-28 16:58:50,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:58:50,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:58:50,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:58:50,175 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:58:50,176 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:58:50,177 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-token-2.i [2019-11-28 16:58:50,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b89cb176/37f375f05d0d45a2854236d6a787da0a/FLAG5c5e2e064 [2019-11-28 16:58:50,719 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:58:50,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-token-2.i [2019-11-28 16:58:50,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b89cb176/37f375f05d0d45a2854236d6a787da0a/FLAG5c5e2e064 [2019-11-28 16:58:51,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b89cb176/37f375f05d0d45a2854236d6a787da0a [2019-11-28 16:58:51,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:58:51,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:58:51,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:58:51,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:58:51,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:58:51,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ad889a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51, skipping insertion in model container [2019-11-28 16:58:51,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:58:51,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:58:51,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:58:51,551 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:58:51,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:58:51,670 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:58:51,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51 WrapperNode [2019-11-28 16:58:51,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:58:51,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:58:51,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:58:51,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:58:51,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:58:51,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:58:51,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:58:51,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:58:51,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (1/1) ... [2019-11-28 16:58:51,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:58:51,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:58:51,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:58:51,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:58:51,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (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 [2019-11-28 16:58:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:58:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:58:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 16:58:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 16:58:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 16:58:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:58:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:58:51,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:58:52,323 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:58:52,323 INFO L287 CfgBuilder]: Removed 19 assume(true) statements. [2019-11-28 16:58:52,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:58:52 BoogieIcfgContainer [2019-11-28 16:58:52,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:58:52,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:58:52,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:58:52,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:58:52,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:58:51" (1/3) ... [2019-11-28 16:58:52,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43966b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:58:52, skipping insertion in model container [2019-11-28 16:58:52,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:58:51" (2/3) ... [2019-11-28 16:58:52,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43966b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:58:52, skipping insertion in model container [2019-11-28 16:58:52,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:58:52" (3/3) ... [2019-11-28 16:58:52,333 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2019-11-28 16:58:52,343 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:58:52,351 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-28 16:58:52,362 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-28 16:58:52,382 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:58:52,383 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:58:52,383 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:58:52,383 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:58:52,383 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:58:52,383 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:58:52,384 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:58:52,384 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:58:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-28 16:58:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 16:58:52,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:52,405 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 16:58:52,405 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 890337990, now seen corresponding path program 1 times [2019-11-28 16:58:52,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:58:52,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265254767] [2019-11-28 16:58:52,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:58:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:58:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:58:52,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265254767] [2019-11-28 16:58:52,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:58:52,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:58:52,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688555259] [2019-11-28 16:58:52,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:58:52,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:58:52,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:58:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:58:52,581 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2019-11-28 16:58:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:58:52,602 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2019-11-28 16:58:52,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:58:52,604 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-28 16:58:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:58:52,614 INFO L225 Difference]: With dead ends: 86 [2019-11-28 16:58:52,614 INFO L226 Difference]: Without dead ends: 39 [2019-11-28 16:58:52,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:58:52,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-28 16:58:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-28 16:58:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 16:58:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-28 16:58:52,656 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 6 [2019-11-28 16:58:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:58:52,656 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-28 16:58:52,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:58:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-28 16:58:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 16:58:52,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:52,657 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 16:58:52,658 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:52,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash 889571369, now seen corresponding path program 1 times [2019-11-28 16:58:52,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:58:52,659 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053200033] [2019-11-28 16:58:52,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:58:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:58:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:58:52,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053200033] [2019-11-28 16:58:52,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:58:52,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 16:58:52,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179076366] [2019-11-28 16:58:52,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 16:58:52,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:58:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 16:58:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:58:52,798 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2019-11-28 16:58:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:58:52,908 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-28 16:58:52,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:58:52,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-28 16:58:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:58:52,910 INFO L225 Difference]: With dead ends: 39 [2019-11-28 16:58:52,910 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 16:58:52,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:58:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 16:58:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-28 16:58:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-28 16:58:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-28 16:58:52,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2019-11-28 16:58:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:58:52,919 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-28 16:58:52,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 16:58:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-28 16:58:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 16:58:52,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:52,920 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:58:52,921 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1806865149, now seen corresponding path program 1 times [2019-11-28 16:58:52,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:58:52,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791954517] [2019-11-28 16:58:52,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:58:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:58:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:58:52,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791954517] [2019-11-28 16:58:52,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:58:52,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 16:58:52,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244846672] [2019-11-28 16:58:52,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 16:58:52,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:58:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 16:58:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:58:52,997 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2019-11-28 16:58:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:58:53,088 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2019-11-28 16:58:53,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 16:58:53,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-28 16:58:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:58:53,090 INFO L225 Difference]: With dead ends: 63 [2019-11-28 16:58:53,090 INFO L226 Difference]: Without dead ends: 61 [2019-11-28 16:58:53,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:58:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-28 16:58:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2019-11-28 16:58:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 16:58:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-28 16:58:53,098 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2019-11-28 16:58:53,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:58:53,099 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-28 16:58:53,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 16:58:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-28 16:58:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 16:58:53,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:53,100 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:58:53,100 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:53,101 INFO L82 PathProgramCache]: Analyzing trace with hash -913382283, now seen corresponding path program 1 times [2019-11-28 16:58:53,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:58:53,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906462973] [2019-11-28 16:58:53,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:58:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:58:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:58:53,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906462973] [2019-11-28 16:58:53,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:58:53,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 16:58:53,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883322854] [2019-11-28 16:58:53,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:58:53,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:58:53,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:58:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:58:53,205 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2019-11-28 16:58:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:58:53,332 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-28 16:58:53,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:58:53,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-28 16:58:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:58:53,333 INFO L225 Difference]: With dead ends: 35 [2019-11-28 16:58:53,333 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 16:58:53,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:58:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 16:58:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-28 16:58:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 16:58:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-28 16:58:53,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 12 [2019-11-28 16:58:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:58:53,341 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-28 16:58:53,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:58:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-28 16:58:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 16:58:53,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:53,342 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:58:53,343 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash -913344547, now seen corresponding path program 1 times [2019-11-28 16:58:53,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:58:53,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381250909] [2019-11-28 16:58:53,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:58:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:58:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:58:53,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381250909] [2019-11-28 16:58:53,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:58:53,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 16:58:53,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128795101] [2019-11-28 16:58:53,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:58:53,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:58:53,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:58:53,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:58:53,504 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 5 states. [2019-11-28 16:58:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:58:53,670 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-11-28 16:58:53,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:58:53,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-28 16:58:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:58:53,671 INFO L225 Difference]: With dead ends: 68 [2019-11-28 16:58:53,671 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 16:58:53,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:58:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 16:58:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2019-11-28 16:58:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-28 16:58:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-28 16:58:53,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 12 [2019-11-28 16:58:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:58:53,680 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-28 16:58:53,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:58:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-28 16:58:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 16:58:53,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:53,681 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:58:53,681 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:53,682 INFO L82 PathProgramCache]: Analyzing trace with hash -313255267, now seen corresponding path program 1 times [2019-11-28 16:58:53,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:58:53,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393984184] [2019-11-28 16:58:53,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:58:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:58:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:58:53,798 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:58:53,798 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:58:53,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:58:53 BoogieIcfgContainer [2019-11-28 16:58:53,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:58:53,848 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:58:53,848 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:58:53,848 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:58:53,849 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:58:52" (3/4) ... [2019-11-28 16:58:53,852 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:58:53,936 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:58:53,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:58:53,939 INFO L168 Benchmark]: Toolchain (without parser) took 2851.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 956.3 MB in the beginning and 975.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 107.0 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:53,940 INFO L168 Benchmark]: CDTParser took 0.79 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. [2019-11-28 16:58:53,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 584.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:53,944 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:53,944 INFO L168 Benchmark]: Boogie Preprocessor took 35.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:58:53,945 INFO L168 Benchmark]: RCFGBuilder took 556.82 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: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:53,947 INFO L168 Benchmark]: TraceAbstraction took 1521.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.2 MB in the end (delta: 100.5 MB). Peak memory consumption was 100.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:53,948 INFO L168 Benchmark]: Witness Printer took 88.05 ms. Allocated memory is still 1.2 GB. Free memory is still 975.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:58:53,954 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 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 584.13 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 61.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 556.82 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: 24.6 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1521.32 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.2 MB in the end (delta: 100.5 MB). Peak memory consumption was 100.5 MB. Max. memory is 11.5 GB. * Witness Printer took 88.05 ms. Allocated memory is still 1.2 GB. Free memory is still 975.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1026]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L993] SLL* head = malloc(sizeof(SLL)); [L994] head->next = ((void*)0) [L995] head->prev = ((void*)0) [L996] head->data = 0 [L998] SLL* x = head; [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1010] x->data = 1 [L1011] x->next = malloc(sizeof(SLL)) [L1012] EXPR x->next [L1012] x->next->prev = x [L1013] EXPR x->next [L1013] x->next->data = 2 [L1015] x = head [L1017] COND FALSE !(!(((void*)0) != x)) [L1019] EXPR x->data [L1019] COND FALSE !(1 != x->data) [L1024] EXPR x->data [L1024] COND FALSE !(!(1 == x->data)) [L1025] EXPR x->next [L1025] x = x->next [L1026] EXPR x->data [L1026] COND TRUE !(2 != x->data) [L1026] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 6 error locations. Result: UNSAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 91 SDslu, 190 SDs, 0 SdLazy, 141 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1401 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 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...