/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:31:19,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:31:19,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:31:19,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:31:19,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:31:19,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:31:19,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:31:19,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:31:19,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:31:19,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:31:19,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:31:19,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:31:19,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:31:19,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:31:19,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:31:19,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:31:19,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:31:19,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:31:19,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:31:19,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:31:19,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:31:19,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:31:19,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:31:19,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:31:19,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:31:19,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:31:19,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:31:19,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:31:19,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:31:19,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:31:19,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:31:19,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:31:19,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:31:19,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:31:19,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:31:19,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:31:19,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:31:19,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:31:19,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:31:19,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:31:19,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:31:19,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 18:31:19,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:31:19,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:31:19,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:31:19,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:31:19,319 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:31:19,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:31:19,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:31:19,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:31:19,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:31:19,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:31:19,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:31:19,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:31:19,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:31:19,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:31:19,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:31:19,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:31:19,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:31:19,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:31:19,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:31:19,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:31:19,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:31:19,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:31:19,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:31:19,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:31:19,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:31:19,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:31:19,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:31:19,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:31:19,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:31:19,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 18:31:19,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:31:19,672 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:31:19,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:31:19,678 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:31:19,678 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:31:19,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-10-14 18:31:19,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c615def3d/63a685b107a740c0b6fa296d83890c43/FLAG38171a154 [2020-10-14 18:31:20,206 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:31:20,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/skippedu.c [2020-10-14 18:31:20,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c615def3d/63a685b107a740c0b6fa296d83890c43/FLAG38171a154 [2020-10-14 18:31:20,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c615def3d/63a685b107a740c0b6fa296d83890c43 [2020-10-14 18:31:20,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:31:20,557 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:31:20,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:31:20,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:31:20,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:31:20,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5badac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20, skipping insertion in model container [2020-10-14 18:31:20,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:31:20,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:31:20,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:31:20,783 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:31:20,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:31:20,818 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:31:20,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20 WrapperNode [2020-10-14 18:31:20,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:31:20,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:31:20,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:31:20,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:31:20,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... [2020-10-14 18:31:20,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:31:20,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:31:20,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:31:20,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:31:20,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-14 18:31:21,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:31:21,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:31:21,013 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:31:21,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:31:21,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:31:21,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:31:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:31:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:31:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:31:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:31:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:31:21,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:31:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:31:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:31:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:31:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:31:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:31:21,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:31:21,293 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:31:21,293 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 18:31:21,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:31:21 BoogieIcfgContainer [2020-10-14 18:31:21,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:31:21,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:31:21,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:31:21,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:31:21,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:31:20" (1/3) ... [2020-10-14 18:31:21,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1871c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:31:21, skipping insertion in model container [2020-10-14 18:31:21,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:31:20" (2/3) ... [2020-10-14 18:31:21,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1871c3b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:31:21, skipping insertion in model container [2020-10-14 18:31:21,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:31:21" (3/3) ... [2020-10-14 18:31:21,308 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-10-14 18:31:21,325 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:31:21,334 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:31:21,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:31:21,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:31:21,379 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:31:21,379 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:31:21,379 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:31:21,379 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:31:21,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:31:21,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:31:21,380 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:31:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-14 18:31:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 18:31:21,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:31:21,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:31:21,410 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:31:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:31:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash -978746934, now seen corresponding path program 1 times [2020-10-14 18:31:21,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:31:21,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724976989] [2020-10-14 18:31:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:31:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:21,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:22,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:22,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:22,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 18:31:22,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:31:22,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-14 18:31:22,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:22,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:31:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:31:22,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:31:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:31:22,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:31:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:22,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:22,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:22,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:31:22,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:31:22,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:31:22,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:22,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:22,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:31:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:31:22,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:31:22,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:22,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-14 18:31:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:22,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:22,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:22,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:22,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:31:22,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:31:22,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 18:31:22,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:22,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:22,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:31:22,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:31:22,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:31:22,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:31:22,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724976989] [2020-10-14 18:31:22,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:31:22,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:31:22,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326975744] [2020-10-14 18:31:22,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:31:22,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:31:22,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:31:22,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:31:22,392 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-10-14 18:31:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:31:22,645 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2020-10-14 18:31:22,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:31:22,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 18:31:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:31:22,657 INFO L225 Difference]: With dead ends: 77 [2020-10-14 18:31:22,658 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 18:31:22,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:31:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 18:31:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-14 18:31:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 18:31:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-14 18:31:22,712 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-14 18:31:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:31:22,713 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-14 18:31:22,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:31:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-14 18:31:22,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:31:22,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:31:22,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:31:22,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:31:22,715 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:31:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:31:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash 657216618, now seen corresponding path program 1 times [2020-10-14 18:31:22,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:31:22,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390168413] [2020-10-14 18:31:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:31:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:22,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:22,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:23,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:23,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:31:23,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:31:23,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-14 18:31:23,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:23,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:31:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 18:31:23,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:31:23,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:23,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:31:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:23,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:23,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:23,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:31:23,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:31:23,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:31:23,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:23,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:31:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:31:23,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:31:23,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:23,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 18:31:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:23,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:23,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:23,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:31:23,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:31:23,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:31:23,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:23,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:23,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:31:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:31:23,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:31:23,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:31:23,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390168413] [2020-10-14 18:31:23,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:31:23,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:31:23,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28455932] [2020-10-14 18:31:23,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:31:23,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:31:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:31:23,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:31:23,353 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 10 states. [2020-10-14 18:31:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:31:23,762 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-14 18:31:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:31:23,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-14 18:31:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:31:23,765 INFO L225 Difference]: With dead ends: 63 [2020-10-14 18:31:23,765 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 18:31:23,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:31:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 18:31:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-14 18:31:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:31:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-14 18:31:23,778 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 29 [2020-10-14 18:31:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:31:23,779 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-14 18:31:23,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:31:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-14 18:31:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:31:23,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:31:23,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:31:23,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:31:23,781 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:31:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:31:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1358281196, now seen corresponding path program 1 times [2020-10-14 18:31:23,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:31:23,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593873156] [2020-10-14 18:31:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:31:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:23,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:23,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:23,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 18:31:23,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:31:23,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-14 18:31:23,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:23,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:23,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:31:23,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:31:23,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 18:31:23,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:23,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:31:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:23,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:23,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:23,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:31:23,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:31:23,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:31:23,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:23,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:31:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:31:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:31:23,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:23,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-14 18:31:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:31:23,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:31:23,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:31:23,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:31:23,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:31:23,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:31:23,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:31:23,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:31:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:31:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:31:23,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:31:23,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:31:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:31:23,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593873156] [2020-10-14 18:31:23,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:31:23,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 18:31:23,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101349446] [2020-10-14 18:31:23,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:31:23,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:31:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:31:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:31:23,946 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-10-14 18:31:24,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:31:24,083 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-10-14 18:31:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:31:24,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-14 18:31:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:31:24,088 INFO L225 Difference]: With dead ends: 86 [2020-10-14 18:31:24,088 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 18:31:24,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:31:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 18:31:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 18:31:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:31:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-14 18:31:24,107 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 29 [2020-10-14 18:31:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:31:24,107 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-14 18:31:24,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:31:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-14 18:31:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 18:31:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:31:24,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:31:24,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:31:24,115 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:31:24,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:31:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash -8765042, now seen corresponding path program 2 times [2020-10-14 18:31:24,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:31:24,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403049403] [2020-10-14 18:31:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:31:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 18:31:24,142 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 18:31:24,142 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 18:31:24,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:31:24,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 06:31:24 BoogieIcfgContainer [2020-10-14 18:31:24,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 18:31:24,177 INFO L168 Benchmark]: Toolchain (without parser) took 3619.27 ms. Allocated memory was 147.3 MB in the beginning and 243.8 MB in the end (delta: 96.5 MB). Free memory was 103.3 MB in the beginning and 144.0 MB in the end (delta: -40.7 MB). Peak memory consumption was 55.8 MB. Max. memory is 7.1 GB. [2020-10-14 18:31:24,179 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-14 18:31:24,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.51 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 18:31:24,182 INFO L168 Benchmark]: Boogie Preprocessor took 123.95 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 92.9 MB in the beginning and 181.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-10-14 18:31:24,184 INFO L168 Benchmark]: RCFGBuilder took 356.73 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 163.4 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-10-14 18:31:24,190 INFO L168 Benchmark]: TraceAbstraction took 2872.09 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 163.4 MB in the beginning and 144.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 59.2 MB. Max. memory is 7.1 GB. [2020-10-14 18:31:24,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.51 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.95 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 92.9 MB in the beginning and 181.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 356.73 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 163.4 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2872.09 ms. Allocated memory was 203.9 MB in the beginning and 243.8 MB in the end (delta: 39.8 MB). Free memory was 163.4 MB in the beginning and 144.0 MB in the end (delta: 19.4 MB). Peak memory consumption was 59.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int SIZE; [L12] const int MAX = 100000; [L16] SIZE = __VERIFIER_nondet_int() [L17] COND TRUE SIZE > 1 && SIZE < MAX [L19] int i; [L20] int *a = malloc(sizeof(int)*SIZE); [L22] i = 0 [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ [L22] COND FALSE !(i < SIZE) [L27] COND FALSE !(SIZE % 2 != 0) [L29] CALL assume_abort_if_not(SIZE % 2 == 0) [L4] COND FALSE !(!cond) [L29] RET assume_abort_if_not(SIZE % 2 == 0) [L30] i = 1 [L30] COND TRUE i <= SIZE/2 [L32] EXPR a[2*i-2] [L32] COND FALSE !(a[2*i-2] > i) [L36] EXPR a[2*i-1] [L36] COND TRUE a[2*i-1] > i [L38] a[2*i-1] = 2*i-1 [L30] i++ [L30] COND FALSE !(i <= SIZE/2) [L42] i = 0 [L42] COND TRUE i < SIZE [L44] EXPR a[i] [L44] CALL __VERIFIER_assert( a[i] <= i ) [L6] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 99 SDslu, 123 SDs, 0 SdLazy, 366 SolverSat, 36 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=3, 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, 3 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 6944 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...