/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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-fpi/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:33:21,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:33:21,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:33:21,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:33:21,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:33:21,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:33:21,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:33:21,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:33:21,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:33:21,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:33:21,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:33:21,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:33:21,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:33:21,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:33:21,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:33:21,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:33:21,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:33:21,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:33:21,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:33:21,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:33:21,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:33:21,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:33:21,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:33:21,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:33:21,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:33:21,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:33:21,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:33:21,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:33:21,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:33:21,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:33:21,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:33:21,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:33:21,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:33:21,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:33:21,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:33:21,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:33:21,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:33:21,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:33:21,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:33:21,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:33:21,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:33:21,673 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 [2020-09-24 19:33:21,701 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:33:21,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:33:21,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:33:21,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:33:21,703 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:33:21,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:33:21,706 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:33:21,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:33:21,706 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:33:21,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:33:21,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:33:21,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:33:21,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:33:21,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:33:21,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:33:21,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:33:21,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:33:21,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:33:21,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:33:21,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:33:21,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:33:21,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:33:21,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:33:21,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:33:21,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:33:21,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:33:21,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:33:21,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:33:21,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:33:21,713 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:33:22,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:33:22,213 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:33:22,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:33:22,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:33:22,222 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:33:22,223 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-09-24 19:33:22,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e037cedff/bf9aef9f167b4b83984abde54484647d/FLAG6b8e9bc9b [2020-09-24 19:33:22,864 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:33:22,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s2iff.c [2020-09-24 19:33:22,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e037cedff/bf9aef9f167b4b83984abde54484647d/FLAG6b8e9bc9b [2020-09-24 19:33:23,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e037cedff/bf9aef9f167b4b83984abde54484647d [2020-09-24 19:33:23,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:33:23,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:33:23,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:23,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:33:23,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:33:23,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3add5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23, skipping insertion in model container [2020-09-24 19:33:23,237 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:33:23,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:33:23,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:23,529 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:33:23,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:33:23,569 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:33:23,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23 WrapperNode [2020-09-24 19:33:23,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:33:23,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:33:23,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:33:23,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:33:23,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (1/1) ... [2020-09-24 19:33:23,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:33:23,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:33:23,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:33:23,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:33:23,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (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 [2020-09-24 19:33:23,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:33:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:33:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 19:33:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 19:33:23,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:33:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:33:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 19:33:23,788 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 19:33:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 19:33:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 19:33:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-24 19:33:23,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:33:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 19:33:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-24 19:33:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 19:33:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 19:33:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 19:33:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:33:23,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:33:24,178 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:33:24,178 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 19:33:24,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:24 BoogieIcfgContainer [2020-09-24 19:33:24,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:33:24,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:33:24,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:33:24,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:33:24,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:33:23" (1/3) ... [2020-09-24 19:33:24,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f40bbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:24, skipping insertion in model container [2020-09-24 19:33:24,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:33:23" (2/3) ... [2020-09-24 19:33:24,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f40bbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:33:24, skipping insertion in model container [2020-09-24 19:33:24,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:33:24" (3/3) ... [2020-09-24 19:33:24,194 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-09-24 19:33:24,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:33:24,215 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:33:24,238 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:33:24,268 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:33:24,269 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:33:24,269 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:33:24,269 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:33:24,269 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:33:24,269 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:33:24,269 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:33:24,270 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:33:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-09-24 19:33:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 19:33:24,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:24,304 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] [2020-09-24 19:33:24,305 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:24,311 INFO L82 PathProgramCache]: Analyzing trace with hash 171473808, now seen corresponding path program 1 times [2020-09-24 19:33:24,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:24,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498520966] [2020-09-24 19:33:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:24,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:24,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:24,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:24,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 19:33:24,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:24,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-09-24 19:33:24,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:24,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-24 19:33:24,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:33:24,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:24,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:24,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:24,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:33:24,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:24,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:33:24,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:24,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:24,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:24,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:33:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:24,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:24,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:24,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:24,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:33:24,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:24,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:24,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:24,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:24,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:24,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498520966] [2020-09-24 19:33:24,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:24,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 19:33:24,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289053920] [2020-09-24 19:33:24,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 19:33:24,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 19:33:24,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 19:33:24,892 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 3 states. [2020-09-24 19:33:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:25,084 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2020-09-24 19:33:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 19:33:25,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-24 19:33:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:25,098 INFO L225 Difference]: With dead ends: 113 [2020-09-24 19:33:25,099 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 19:33:25,103 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 [2020-09-24 19:33:25,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 19:33:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-24 19:33:25,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 19:33:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-09-24 19:33:25,151 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 31 [2020-09-24 19:33:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:25,152 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-09-24 19:33:25,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 19:33:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-09-24 19:33:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 19:33:25,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:25,154 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] [2020-09-24 19:33:25,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:33:25,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash 921692051, now seen corresponding path program 1 times [2020-09-24 19:33:25,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:25,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929104126] [2020-09-24 19:33:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:25,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:25,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:25,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:25,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-24 19:33:25,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 19:33:25,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 449 [2020-09-24 19:33:25,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:33:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:33:25,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 19:33:25,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:25,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:25,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:25,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:25,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:33:25,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:25,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 19:33:25,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:25,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:25,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:25,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:33:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:25,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:25,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:25,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:25,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:25,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-24 19:33:25,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:25,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 19:33:25,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:25,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:33:25,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:25,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929104126] [2020-09-24 19:33:25,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:33:25,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:33:25,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125799585] [2020-09-24 19:33:25,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:33:25,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:25,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:33:25,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:33:25,722 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 5 states. [2020-09-24 19:33:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:25,886 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2020-09-24 19:33:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:33:25,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-24 19:33:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:25,889 INFO L225 Difference]: With dead ends: 80 [2020-09-24 19:33:25,889 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 19:33:25,890 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 [2020-09-24 19:33:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 19:33:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-24 19:33:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 19:33:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-09-24 19:33:25,901 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 31 [2020-09-24 19:33:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:25,902 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-09-24 19:33:25,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:33:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-09-24 19:33:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 19:33:25,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:25,904 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] [2020-09-24 19:33:25,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:33:25,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash -827220298, now seen corresponding path program 1 times [2020-09-24 19:33:25,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:25,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943704902] [2020-09-24 19:33:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:25,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:26,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:26,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:26,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:26,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 19:33:26,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 19:33:26,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-09-24 19:33:26,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:26,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 19:33:26,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-24 19:33:26,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 19:33:26,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:27,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:33:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:27,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:27,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:27,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 19:33:27,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:27,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 19:33:27,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:27,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:27,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:27,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:27,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:33:27,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 19:33:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:33:27,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:33:27,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:33:27,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:33:27,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:33:27,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:33:27,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:33:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:33:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:33:27,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:33:27,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:33:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:33:27,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943704902] [2020-09-24 19:33:27,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:33:27,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 19:33:27,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952129337] [2020-09-24 19:33:27,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 19:33:27,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:33:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 19:33:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-09-24 19:33:27,824 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 20 states. [2020-09-24 19:33:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:33:29,408 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2020-09-24 19:33:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 19:33:29,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-09-24 19:33:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:33:29,413 INFO L225 Difference]: With dead ends: 107 [2020-09-24 19:33:29,414 INFO L226 Difference]: Without dead ends: 101 [2020-09-24 19:33:29,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 19:33:29,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-24 19:33:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-09-24 19:33:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 19:33:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-09-24 19:33:29,429 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 48 [2020-09-24 19:33:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:33:29,430 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-09-24 19:33:29,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 19:33:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-09-24 19:33:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 19:33:29,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:33:29,432 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] [2020-09-24 19:33:29,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:33:29,432 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:33:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:33:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1272927570, now seen corresponding path program 1 times [2020-09-24 19:33:29,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:33:29,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353757640] [2020-09-24 19:33:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:33:29,449 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-09-24 19:33:29,449 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-09-24 19:33:29,450 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:33:29,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:33:29,477 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-09-24 19:33:29,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:33:29 BoogieIcfgContainer [2020-09-24 19:33:29,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:33:29,482 INFO L168 Benchmark]: Toolchain (without parser) took 6261.67 ms. Allocated memory was 140.5 MB in the beginning and 276.8 MB in the end (delta: 136.3 MB). Free memory was 104.1 MB in the beginning and 222.6 MB in the end (delta: -118.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:29,483 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:33:29,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.48 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 92.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:29,485 INFO L168 Benchmark]: Boogie Preprocessor took 128.65 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 180.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:29,486 INFO L168 Benchmark]: RCFGBuilder took 484.30 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 160.7 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:29,487 INFO L168 Benchmark]: TraceAbstraction took 5292.91 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 160.1 MB in the beginning and 222.6 MB in the end (delta: -62.5 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:33:29,491 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 346.48 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 92.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.65 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 92.5 MB in the beginning and 180.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 484.30 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 160.7 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5292.91 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 160.1 MB in the beginning and 222.6 MB in the end (delta: -62.5 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 [L30] COND TRUE i