/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:46:37,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:46:37,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:46:37,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:46:37,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:46:37,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:46:37,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:46:37,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:46:37,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:46:37,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:46:37,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:46:37,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:46:37,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:46:37,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:46:37,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:46:37,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:46:37,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:46:37,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:46:37,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:46:37,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:46:37,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:46:37,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:46:37,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:46:37,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:46:37,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:46:37,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:46:37,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:46:37,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:46:37,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:46:37,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:46:37,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:46:37,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:46:37,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:46:37,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:46:37,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:46:37,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:46:37,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:46:37,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:46:37,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:46:37,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:46:37,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:46:37,792 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 14:46:37,837 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:46:37,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:46:37,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:46:37,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:46:37,839 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:46:37,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:46:37,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:46:37,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:46:37,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:46:37,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:46:37,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:46:37,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:46:37,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:46:37,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:46:37,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:46:37,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:46:37,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:46:37,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:46:37,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:46:37,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:46:37,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:46:37,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:46:37,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:46:37,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:46:37,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:46:37,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:46:37,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:46:37,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:46:37,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:46:37,846 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:46:38,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:46:38,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:46:38,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:46:38,381 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:46:38,382 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:46:38,383 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 14:46:38,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ff081d43/b3582543b35840c18804b75de23c6d75/FLAGe7b67aba6 [2020-09-25 14:46:39,020 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:46:39,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 14:46:39,030 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ff081d43/b3582543b35840c18804b75de23c6d75/FLAGe7b67aba6 [2020-09-25 14:46:39,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ff081d43/b3582543b35840c18804b75de23c6d75 [2020-09-25 14:46:39,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:46:39,375 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:46:39,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:46:39,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:46:39,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:46:39,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe12ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39, skipping insertion in model container [2020-09-25 14:46:39,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:46:39,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:46:39,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:46:39,649 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:46:39,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:46:39,685 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:46:39,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39 WrapperNode [2020-09-25 14:46:39,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:46:39,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:46:39,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:46:39,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:46:39,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (1/1) ... [2020-09-25 14:46:39,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:46:39,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:46:39,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:46:39,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:46:39,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (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 14:46:39,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:46:39,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:46:39,890 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 14:46:39,890 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 14:46:39,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:46:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:46:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 14:46:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 14:46:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 14:46:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:46:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:46:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:46:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:46:40,131 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:46:40,132 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:46:40,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:46:40 BoogieIcfgContainer [2020-09-25 14:46:40,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:46:40,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:46:40,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:46:40,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:46:40,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:46:39" (1/3) ... [2020-09-25 14:46:40,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed1a867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:46:40, skipping insertion in model container [2020-09-25 14:46:40,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:46:39" (2/3) ... [2020-09-25 14:46:40,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ed1a867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:46:40, skipping insertion in model container [2020-09-25 14:46:40,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:46:40" (3/3) ... [2020-09-25 14:46:40,149 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-25 14:46:40,168 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:46:40,178 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:46:40,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:46:40,250 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:46:40,251 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:46:40,251 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:46:40,251 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:46:40,251 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:46:40,252 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:46:40,252 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:46:40,252 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:46:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-25 14:46:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 14:46:40,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:40,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:40,317 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-25 14:46:40,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:40,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817714444] [2020-09-25 14:46:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:40,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:40,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:40,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:40,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 14:46:40,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:40,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-25 14:46:40,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:40,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:46:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 14:46:40,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 14:46:40,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 14:46:40,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:40,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:40,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:46:40,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:40,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:46:40,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:40,701 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:40,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:40,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:40,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:40,710 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 14:46:40,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817714444] [2020-09-25 14:46:40,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:46:40,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 14:46:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255581169] [2020-09-25 14:46:40,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:46:40,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:46:40,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:46:40,744 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-09-25 14:46:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:40,854 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-09-25 14:46:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:46:40,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 14:46:40,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:40,870 INFO L225 Difference]: With dead ends: 70 [2020-09-25 14:46:40,870 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 14:46:40,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:46:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 14:46:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 14:46:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 14:46:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 14:46:40,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-25 14:46:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:40,930 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 14:46:40,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:46:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 14:46:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 14:46:40,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:40,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:46:40,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:46:40,933 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:40,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:40,934 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-25 14:46:40,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:40,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506306994] [2020-09-25 14:46:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:40,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:41,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:41,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 14:46:41,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:41,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-25 14:46:41,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:41,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:41,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:46:41,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 14:46:41,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 14:46:41,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:41,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:41,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:41,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:41,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:46:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:41,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 14:46:41,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:41,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:41,217 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 14:46:41,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506306994] [2020-09-25 14:46:41,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:46:41,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 14:46:41,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569294957] [2020-09-25 14:46:41,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 14:46:41,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:41,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 14:46:41,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:46:41,222 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-25 14:46:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:41,319 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 14:46:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 14:46:41,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-25 14:46:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:41,322 INFO L225 Difference]: With dead ends: 42 [2020-09-25 14:46:41,322 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 14:46:41,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:46:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 14:46:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 14:46:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 14:46:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 14:46:41,336 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-25 14:46:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:41,337 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 14:46:41,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 14:46:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 14:46:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 14:46:41,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:41,338 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 14:46:41,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:46:41,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:41,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-25 14:46:41,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:41,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025692152] [2020-09-25 14:46:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:41,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:42,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:42,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 14:46:42,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:46:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-09-25 14:46:42,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:42,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 14:46:42,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 14:46:42,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 14:46:42,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:42,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:46:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:42,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:42,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 14:46:42,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:42,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 14:46:42,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:42,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:46:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:42,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:46:42,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:42,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 14:46:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:46:42,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:46:42,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:46:42,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 14:46:42,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:46:42,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 14:46:42,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:46:42,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:46:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:46:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:46:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 14:46:42,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:46:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:46:42,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025692152] [2020-09-25 14:46:42,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:46:42,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 14:46:42,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680304076] [2020-09-25 14:46:42,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 14:46:42,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:46:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 14:46:42,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 14:46:42,296 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-25 14:46:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:46:42,442 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-09-25 14:46:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 14:46:42,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 14:46:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:46:42,444 INFO L225 Difference]: With dead ends: 41 [2020-09-25 14:46:42,444 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 14:46:42,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 14:46:42,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 14:46:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-09-25 14:46:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 14:46:42,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-25 14:46:42,463 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 28 [2020-09-25 14:46:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:46:42,463 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-25 14:46:42,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 14:46:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-25 14:46:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 14:46:42,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:46:42,469 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-25 14:46:42,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:46:42,469 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:46:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:46:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-25 14:46:42,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:46:42,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430003356] [2020-09-25 14:46:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:46:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 14:46:42,491 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 14:46:42,491 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 14:46:42,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:46:42,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 02:46:42 BoogieIcfgContainer [2020-09-25 14:46:42,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 14:46:42,530 INFO L168 Benchmark]: Toolchain (without parser) took 3156.11 ms. Allocated memory was 147.3 MB in the beginning and 235.4 MB in the end (delta: 88.1 MB). Free memory was 104.1 MB in the beginning and 151.3 MB in the end (delta: -47.2 MB). Peak memory consumption was 40.9 MB. Max. memory is 7.1 GB. [2020-09-25 14:46:42,535 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 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. [2020-09-25 14:46:42,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.64 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-25 14:46:42,540 INFO L168 Benchmark]: Boogie Preprocessor took 119.61 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.5 MB in the beginning and 183.8 MB in the end (delta: -90.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-25 14:46:42,541 INFO L168 Benchmark]: RCFGBuilder took 331.58 ms. Allocated memory is still 203.9 MB. Free memory was 183.8 MB in the beginning and 168.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-09-25 14:46:42,548 INFO L168 Benchmark]: TraceAbstraction took 2384.82 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 168.2 MB in the beginning and 151.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. [2020-09-25 14:46:42,559 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 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 310.64 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.61 ms. Allocated memory was 147.3 MB in the beginning and 203.9 MB in the end (delta: 56.6 MB). Free memory was 93.5 MB in the beginning and 183.8 MB in the end (delta: -90.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.58 ms. Allocated memory is still 203.9 MB. Free memory was 183.8 MB in the beginning and 168.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2384.82 ms. Allocated memory was 203.9 MB in the beginning and 235.4 MB in the end (delta: 31.5 MB). Free memory was 168.2 MB in the beginning and 151.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 48.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i