/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:15:50,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:15:50,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:15:50,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:15:50,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:15:50,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:15:50,680 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:15:50,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:15:50,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:15:50,685 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:15:50,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:15:50,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:15:50,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:15:50,689 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:15:50,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:15:50,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:15:50,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:15:50,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:15:50,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:15:50,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:15:50,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:15:50,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:15:50,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:15:50,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:15:50,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:15:50,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:15:50,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:15:50,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:15:50,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:15:50,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:15:50,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:15:50,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:15:50,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:15:50,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:15:50,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:15:50,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:15:50,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:15:50,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:15:50,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:15:50,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:15:50,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:15:50,718 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 05:15:50,741 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:15:50,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:15:50,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:15:50,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:15:50,743 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:15:50,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:15:50,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:15:50,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:15:50,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:15:50,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:15:50,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:15:50,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:15:50,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:15:50,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:15:50,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:15:50,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:15:50,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:15:50,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:15:50,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:15:50,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:15:50,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:15:50,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:15:50,747 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:15:50,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:15:50,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:15:50,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:15:50,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:15:50,748 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:15:50,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:15:50,748 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:15:51,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:15:51,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:15:51,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:15:51,106 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:15:51,107 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:15:51,108 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-2.c [2020-10-14 05:15:51,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81dd7587/629d583f8bd74809a068ae2c9c08a046/FLAGc95313452 [2020-10-14 05:15:51,696 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:15:51,697 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_1-2.c [2020-10-14 05:15:51,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81dd7587/629d583f8bd74809a068ae2c9c08a046/FLAGc95313452 [2020-10-14 05:15:52,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81dd7587/629d583f8bd74809a068ae2c9c08a046 [2020-10-14 05:15:52,084 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:15:52,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:15:52,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:15:52,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:15:52,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:15:52,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337988d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52, skipping insertion in model container [2020-10-14 05:15:52,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:15:52,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:15:52,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:15:52,328 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:15:52,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:15:52,361 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:15:52,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52 WrapperNode [2020-10-14 05:15:52,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:15:52,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:15:52,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:15:52,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:15:52,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... [2020-10-14 05:15:52,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:15:52,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:15:52,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:15:52,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:15:52,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:15:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:15:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:15:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:15:52,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:15:52,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:15:52,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:15:52,563 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:15:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:15:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:15:52,740 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:15:52,740 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:15:52,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:15:52 BoogieIcfgContainer [2020-10-14 05:15:52,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:15:52,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:15:52,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:15:52,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:15:52,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:15:52" (1/3) ... [2020-10-14 05:15:52,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2eb578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:15:52, skipping insertion in model container [2020-10-14 05:15:52,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:15:52" (2/3) ... [2020-10-14 05:15:52,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2eb578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:15:52, skipping insertion in model container [2020-10-14 05:15:52,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:15:52" (3/3) ... [2020-10-14 05:15:52,753 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_1-2.c [2020-10-14 05:15:52,764 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:15:52,772 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:15:52,787 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:15:52,811 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:15:52,812 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:15:52,812 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:15:52,812 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:15:52,812 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:15:52,812 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:15:52,812 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:15:52,813 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:15:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-14 05:15:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:15:52,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:52,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:52,840 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-14 05:15:52,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:52,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916010296] [2020-10-14 05:15:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:52,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:53,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:53,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:15:53,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:53,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-14 05:15:53,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:53,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:53,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:15:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:53,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:15:53,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:15:53,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:53,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:53,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:53,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:53,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:53,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:15:53,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:53,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:53,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:53,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916010296] [2020-10-14 05:15:53,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:15:53,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:15:53,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418675802] [2020-10-14 05:15:53,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:15:53,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:15:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:53,393 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-14 05:15:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:53,429 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-14 05:15:53,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:15:53,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:15:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:53,441 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:15:53,441 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:15:53,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:15:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:15:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:15:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:15:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-14 05:15:53,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-14 05:15:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:53,484 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-14 05:15:53,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:15:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-14 05:15:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:15:53,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:53,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:53,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:15:53,486 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-14 05:15:53,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:53,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584909926] [2020-10-14 05:15:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:53,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:53,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:53,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:15:53,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:53,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-14 05:15:53,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:53,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:53,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:15:53,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:53,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:15:53,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:53,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:53,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:53,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:53,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:53,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:53,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:15:53,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:53,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:53,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:53,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:53,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:53,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584909926] [2020-10-14 05:15:53,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:53,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:15:53,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390638973] [2020-10-14 05:15:53,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:15:53,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:15:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:15:53,827 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-14 05:15:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:53,852 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-14 05:15:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:15:53,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-14 05:15:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:53,854 INFO L225 Difference]: With dead ends: 18 [2020-10-14 05:15:53,855 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 05:15:53,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:15:53,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 05:15:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 05:15:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 05:15:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-14 05:15:53,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-14 05:15:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:53,862 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-14 05:15:53,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:15:53,863 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-14 05:15:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:15:53,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:53,864 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:53,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:15:53,865 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-14 05:15:53,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:53,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162174092] [2020-10-14 05:15:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:53,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:53,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:54,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:15:54,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:54,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-14 05:15:54,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:54,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:54,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:15:54,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:54,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:15:54,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:54,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:54,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:54,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:15:54,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:54,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:54,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:54,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:54,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162174092] [2020-10-14 05:15:54,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:54,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:15:54,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495147669] [2020-10-14 05:15:54,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:15:54,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:15:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:15:54,212 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-14 05:15:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:54,251 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-14 05:15:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:15:54,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-14 05:15:54,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:54,253 INFO L225 Difference]: With dead ends: 19 [2020-10-14 05:15:54,254 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:15:54,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:15:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:15:54,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:15:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:15:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 05:15:54,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 05:15:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:54,265 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 05:15:54,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:15:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 05:15:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 05:15:54,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:15:54,267 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:15:54,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:15:54,267 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:15:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:15:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-14 05:15:54,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:15:54,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081359434] [2020-10-14 05:15:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:15:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:54,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:54,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:15:54,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:15:54,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-14 05:15:54,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:54,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:15:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:15:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:15:54,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:15:54,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:15:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:15:54,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:15:54,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:15:54,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:15:54,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:15:54,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:15:54,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:15:54,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:15:54,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:15:54,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:15:54,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:15:54,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:15:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:15:54,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081359434] [2020-10-14 05:15:54,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:15:54,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:15:54,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662526092] [2020-10-14 05:15:54,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:15:54,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:15:54,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:15:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:15:54,781 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-10-14 05:15:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:15:54,833 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-10-14 05:15:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:15:54,834 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-14 05:15:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:15:54,835 INFO L225 Difference]: With dead ends: 14 [2020-10-14 05:15:54,835 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:15:54,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:15:54,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:15:54,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:15:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:15:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:15:54,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-10-14 05:15:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:15:54,837 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:15:54,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:15:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:15:54,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:15:54,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:15:54,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:15:54,889 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 05:15:54,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:15:54,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:15:54,890 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:15:54,890 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:15:54,890 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:15:54,891 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 18) the Hoare annotation is: true [2020-10-14 05:15:54,891 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 18) no Hoare annotation was computed. [2020-10-14 05:15:54,891 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 18) no Hoare annotation was computed. [2020-10-14 05:15:54,891 INFO L264 CegarLoopResult]: At program point L13-2(lines 13 15) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296))))) [2020-10-14 05:15:54,891 INFO L264 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 2))) (+ (* 2 .cse0) (* 4294967296 (div (+ (* .cse0 (- 2)) main_~x~0) 4294967296))))) [2020-10-14 05:15:54,892 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-14 05:15:54,892 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:15:54,892 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-14 05:15:54,892 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-14 05:15:54,892 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-14 05:15:54,893 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-14 05:15:54,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:15:54 BoogieIcfgContainer [2020-10-14 05:15:54,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:15:54,915 INFO L168 Benchmark]: Toolchain (without parser) took 2828.79 ms. Allocated memory was 145.8 MB in the beginning and 234.9 MB in the end (delta: 89.1 MB). Free memory was 102.4 MB in the beginning and 151.6 MB in the end (delta: -49.2 MB). Peak memory consumption was 39.9 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:54,916 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 05:15:54,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.13 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:54,919 INFO L168 Benchmark]: Boogie Preprocessor took 121.62 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 92.6 MB in the beginning and 180.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:54,919 INFO L168 Benchmark]: RCFGBuilder took 257.92 ms. Allocated memory is still 201.3 MB. Free memory was 180.3 MB in the beginning and 169.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:54,921 INFO L168 Benchmark]: TraceAbstraction took 2167.16 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 168.5 MB in the beginning and 151.6 MB in the end (delta: 16.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:15:54,925 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.13 ms. Allocated memory is still 145.8 MB. Free memory was 102.2 MB in the beginning and 92.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.62 ms. Allocated memory was 145.8 MB in the beginning and 201.3 MB in the end (delta: 55.6 MB). Free memory was 92.6 MB in the beginning and 180.3 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 257.92 ms. Allocated memory is still 201.3 MB. Free memory was 180.3 MB in the beginning and 169.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2167.16 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 168.5 MB in the beginning and 151.6 MB in the end (delta: 16.9 MB). Peak memory consumption was 50.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) + 4294967296 * ((x / 2 * -2 + x) / 4294967296) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 1 SDslu, 80 SDs, 0 SdLazy, 46 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 43 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 36 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1622 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...