/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 SingleStatement --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=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-c90d42b [2020-09-25 05:42:15,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:42:15,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:42:15,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:42:15,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:42:15,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:42:15,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:42:15,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:42:15,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:42:15,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:42:15,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:42:15,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:42:15,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:42:15,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:42:15,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:42:15,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:42:15,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:42:15,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:42:15,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:42:15,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:42:15,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:42:15,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:42:15,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:42:15,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:42:15,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:42:15,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:42:15,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:42:15,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:42:15,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:42:15,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:42:15,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:42:15,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:42:15,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:42:15,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:42:15,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:42:15,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:42:15,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:42:15,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:42:15,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:42:15,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:42:15,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:42:15,874 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 [2020-09-25 05:42:15,924 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:42:15,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:42:15,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:42:15,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:42:15,928 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:42:15,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:42:15,928 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:42:15,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:42:15,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:42:15,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:42:15,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:42:15,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:42:15,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:42:15,931 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:42:15,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:42:15,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:42:15,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:42:15,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:42:15,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:42:15,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:42:15,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:42:15,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:42:15,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:42:15,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:42:15,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:42:15,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:42:15,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:42:15,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:42:15,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:42:15,934 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 -> SingleStatement 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:42:16,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:42:16,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:42:16,506 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:42:16,508 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:42:16,508 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:42:16,510 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-25 05:42:16,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e9f2975b/763df3c68f9c4214839ebebce8f6f6bc/FLAGe73dc2b43 [2020-09-25 05:42:17,188 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:42:17,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-25 05:42:17,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e9f2975b/763df3c68f9c4214839ebebce8f6f6bc/FLAGe73dc2b43 [2020-09-25 05:42:17,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3e9f2975b/763df3c68f9c4214839ebebce8f6f6bc [2020-09-25 05:42:17,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:42:17,533 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:42:17,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:42:17,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:42:17,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:42:17,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccc0ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17, skipping insertion in model container [2020-09-25 05:42:17,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:17,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:42:17,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:42:17,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:42:17,879 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:42:17,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:42:17,923 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:42:17,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17 WrapperNode [2020-09-25 05:42:17,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:42:17,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:42:17,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:42:17,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:42:18,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:18,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:18,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:18,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:18,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:18,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:18,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (1/1) ... [2020-09-25 05:42:18,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:42:18,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:42:18,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:42:18,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:42:18,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (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 [2020-09-25 05:42:18,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:42:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:42:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:42:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 05:42:18,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:42:18,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:42:18,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:42:18,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:42:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 05:42:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:42:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 05:42:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:42:18,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 05:42:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 05:42:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 05:42:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:42:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:42:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 05:42:18,523 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:42:18,524 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 05:42:18,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:42:18 BoogieIcfgContainer [2020-09-25 05:42:18,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:42:18,531 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:42:18,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:42:18,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:42:18,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:42:17" (1/3) ... [2020-09-25 05:42:18,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222d80fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:42:18, skipping insertion in model container [2020-09-25 05:42:18,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:42:17" (2/3) ... [2020-09-25 05:42:18,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222d80fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:42:18, skipping insertion in model container [2020-09-25 05:42:18,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:42:18" (3/3) ... [2020-09-25 05:42:18,540 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-09-25 05:42:18,553 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:42:18,564 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:42:18,585 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:42:18,613 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:42:18,613 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:42:18,613 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:42:18,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:42:18,614 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:42:18,614 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:42:18,614 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:42:18,614 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:42:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 05:42:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 05:42:18,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:18,649 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, 1, 1, 1, 1] [2020-09-25 05:42:18,649 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:18,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1270765896, now seen corresponding path program 1 times [2020-09-25 05:42:18,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:18,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640951960] [2020-09-25 05:42:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:18,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:18,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:19,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:20,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 05:42:20,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 05:42:20,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-09-25 05:42:20,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:20,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:20,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 05:42:20,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:20,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:42:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:20,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:20,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:42:20,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:20,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 05:42:20,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:20,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:20,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:20,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:20,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:20,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:20,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 05:42:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:20,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:20,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:42:20,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:20,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 05:42:20,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:20,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:20,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:20,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 05:42:20,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:20,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:42:20,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640951960] [2020-09-25 05:42:20,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:42:20,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 05:42:20,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882782482] [2020-09-25 05:42:20,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 05:42:20,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 05:42:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:42:20,335 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 3 states. [2020-09-25 05:42:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:20,559 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-09-25 05:42:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 05:42:20,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-09-25 05:42:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:20,578 INFO L225 Difference]: With dead ends: 108 [2020-09-25 05:42:20,578 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 05:42:20,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 05:42:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 05:42:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-09-25 05:42:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-25 05:42:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-09-25 05:42:20,655 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 33 [2020-09-25 05:42:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:20,657 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-09-25 05:42:20,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 05:42:20,658 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-09-25 05:42:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 05:42:20,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:20,662 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, 1, 1, 1, 1] [2020-09-25 05:42:20,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:42:20,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash 50142755, now seen corresponding path program 1 times [2020-09-25 05:42:20,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:20,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404466554] [2020-09-25 05:42:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:20,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:20,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:21,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 05:42:21,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 05:42:21,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1110 [2020-09-25 05:42:21,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:21,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:42:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 05:42:21,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:42:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:21,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:21,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:21,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:42:21,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:21,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 05:42:21,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:21,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:21,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:21,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:21,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:21,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:21,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-25 05:42:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:21,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:21,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:21,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:42:21,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:21,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 05:42:21,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:21,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:21,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:42:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:42:21,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:42:21,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404466554] [2020-09-25 05:42:21,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:42:21,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:42:21,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545929495] [2020-09-25 05:42:21,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:42:21,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:21,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:42:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:42:21,943 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 5 states. [2020-09-25 05:42:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:22,171 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2020-09-25 05:42:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:42:22,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-25 05:42:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:22,175 INFO L225 Difference]: With dead ends: 107 [2020-09-25 05:42:22,176 INFO L226 Difference]: Without dead ends: 72 [2020-09-25 05:42:22,177 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 [2020-09-25 05:42:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-25 05:42:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-09-25 05:42:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-25 05:42:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-09-25 05:42:22,196 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 33 [2020-09-25 05:42:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:22,196 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-09-25 05:42:22,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:42:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-09-25 05:42:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 05:42:22,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:22,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:22,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:42:22,199 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:22,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:22,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1492535423, now seen corresponding path program 1 times [2020-09-25 05:42:22,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:22,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030945675] [2020-09-25 05:42:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:22,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:22,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:22,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:22,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:23,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:23,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:25,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 05:42:25,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 05:42:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2929 [2020-09-25 05:42:25,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:25,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:42:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 05:42:25,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 05:42:25,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:25,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:42:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:25,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:25,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:25,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 05:42:25,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:25,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 05:42:25,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:25,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:25,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:42:25,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:25,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:42:25,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:25,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-25 05:42:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:42:25,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:42:25,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:42:25,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 05:42:25,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:42:25,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 05:42:25,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:42:25,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:42:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:42:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:42:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:42:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:42:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 05:42:25,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030945675] [2020-09-25 05:42:25,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:42:25,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 05:42:25,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810229595] [2020-09-25 05:42:25,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:42:25,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:42:25,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:42:25,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:42:25,333 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 9 states. [2020-09-25 05:42:25,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:42:25,828 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2020-09-25 05:42:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 05:42:25,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-09-25 05:42:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:42:25,831 INFO L225 Difference]: With dead ends: 140 [2020-09-25 05:42:25,831 INFO L226 Difference]: Without dead ends: 91 [2020-09-25 05:42:25,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-25 05:42:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-25 05:42:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-25 05:42:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 05:42:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-09-25 05:42:25,852 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 50 [2020-09-25 05:42:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:42:25,852 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-09-25 05:42:25,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:42:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-09-25 05:42:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 05:42:25,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:42:25,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:42:25,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:42:25,857 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:42:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:42:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash -153041457, now seen corresponding path program 2 times [2020-09-25 05:42:25,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:42:25,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424225630] [2020-09-25 05:42:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:42:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:42:25,895 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:42:25,895 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:42:25,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:42:25,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:42:25 BoogieIcfgContainer [2020-09-25 05:42:25,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:42:25,941 INFO L168 Benchmark]: Toolchain (without parser) took 8409.88 ms. Allocated memory was 143.1 MB in the beginning and 272.1 MB in the end (delta: 129.0 MB). Free memory was 105.3 MB in the beginning and 173.2 MB in the end (delta: -67.9 MB). Peak memory consumption was 61.1 MB. Max. memory is 7.1 GB. [2020-09-25 05:42:25,943 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory was 123.4 MB in the beginning and 123.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 05:42:25,943 INFO L168 Benchmark]: CACSL2BoogieTranslator took 390.09 ms. Allocated memory is still 143.1 MB. Free memory was 104.7 MB in the beginning and 94.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 05:42:25,945 INFO L168 Benchmark]: Boogie Preprocessor took 124.20 ms. Allocated memory was 143.1 MB in the beginning and 203.9 MB in the end (delta: 60.8 MB). Free memory was 94.3 MB in the beginning and 181.6 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:42:25,947 INFO L168 Benchmark]: RCFGBuilder took 480.69 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 161.8 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. [2020-09-25 05:42:25,953 INFO L168 Benchmark]: TraceAbstraction took 7405.21 ms. Allocated memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: 68.2 MB). Free memory was 161.8 MB in the beginning and 173.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-09-25 05:42:25,965 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 143.1 MB. Free memory was 123.4 MB in the beginning and 123.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 390.09 ms. Allocated memory is still 143.1 MB. Free memory was 104.7 MB in the beginning and 94.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.20 ms. Allocated memory was 143.1 MB in the beginning and 203.9 MB in the end (delta: 60.8 MB). Free memory was 94.3 MB in the beginning and 181.6 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 480.69 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 161.8 MB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7405.21 ms. Allocated memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: 68.2 MB). Free memory was 161.8 MB in the beginning and 173.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 56.7 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 FALSE !(a[2*i-1] > i) [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, 66 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 156 SDtfs, 235 SDslu, 146 SDs, 0 SdLazy, 402 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred 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, 34 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 173 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 113 ConstructedInterpolants, 0 QuantifiedInterpolants, 10214 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 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...