/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/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:16:38,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:16:38,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:16:38,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:16:38,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:16:38,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:16:38,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:16:38,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:16:38,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:16:38,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:16:38,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:16:38,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:16:38,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:16:38,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:16:38,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:16:38,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:16:38,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:16:38,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:16:38,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:16:38,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:16:38,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:16:38,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:16:38,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:16:38,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:16:38,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:16:38,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:16:38,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:16:38,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:16:38,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:16:38,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:16:38,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:16:38,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:16:38,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:16:38,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:16:38,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:16:38,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:16:38,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:16:38,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:16:38,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:16:38,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:16:38,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:16:38,817 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 05:16:38,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:16:38,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:16:38,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:16:38,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:16:38,840 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:16:38,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:16:38,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:16:38,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:16:38,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:16:38,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:16:38,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:16:38,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:16:38,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:16:38,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:16:38,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:16:38,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:16:38,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:16:38,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:16:38,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:16:38,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:16:38,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:16:38,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:16:38,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:16:38,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:16:38,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:16:38,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:16:38,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:16:38,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:16:38,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:16:38,845 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 05:16:39,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:16:39,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:16:39,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:16:39,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:16:39,139 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:16:39,140 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-14 05:16:39,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8a747083/1358893f24c1450a97fe0f1c650233a5/FLAG16038cc04 [2020-10-14 05:16:39,636 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:16:39,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-14 05:16:39,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8a747083/1358893f24c1450a97fe0f1c650233a5/FLAG16038cc04 [2020-10-14 05:16:40,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8a747083/1358893f24c1450a97fe0f1c650233a5 [2020-10-14 05:16:40,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:16:40,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:16:40,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:16:40,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:16:40,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:16:40,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c857ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40, skipping insertion in model container [2020-10-14 05:16:40,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:16:40,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:16:40,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:16:40,333 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:16:40,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:16:40,359 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:16:40,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40 WrapperNode [2020-10-14 05:16:40,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:16:40,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:16:40,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:16:40,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:16:40,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (1/1) ... [2020-10-14 05:16:40,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:16:40,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:16:40,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:16:40,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:16:40,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (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 05:16:40,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:16:40,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:16:40,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:16:40,528 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:16:40,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:16:40,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:16:40,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:16:40,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:16:40,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:16:40,674 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:16:40,674 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:16:40,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:16:40 BoogieIcfgContainer [2020-10-14 05:16:40,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:16:40,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:16:40,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:16:40,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:16:40,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:16:40" (1/3) ... [2020-10-14 05:16:40,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30131b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:16:40, skipping insertion in model container [2020-10-14 05:16:40,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:16:40" (2/3) ... [2020-10-14 05:16:40,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30131b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:16:40, skipping insertion in model container [2020-10-14 05:16:40,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:16:40" (3/3) ... [2020-10-14 05:16:40,686 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-10-14 05:16:40,695 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:16:40,702 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:16:40,715 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:16:40,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:16:40,738 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:16:40,738 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:16:40,738 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:16:40,738 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:16:40,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:16:40,738 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:16:40,739 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:16:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-14 05:16:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:16:40,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:40,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:40,758 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-14 05:16:40,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:40,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824525115] [2020-10-14 05:16:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:40,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:41,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:16:41,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:41,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 05:16:41,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:41,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:41,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:16:41,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:41,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:16:41,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:16:41,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:41,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:41,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:41,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:41,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:16:41,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:41,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:41,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:41,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:41,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:41,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:41,133 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 05:16:41,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824525115] [2020-10-14 05:16:41,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:16:41,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:16:41,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333894529] [2020-10-14 05:16:41,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:16:41,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:41,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:16:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:16:41,161 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-14 05:16:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:41,248 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-14 05:16:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:16:41,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:16:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:41,259 INFO L225 Difference]: With dead ends: 29 [2020-10-14 05:16:41,259 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:16:41,262 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 05:16:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:16:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:16:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:16:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-14 05:16:41,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-14 05:16:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:41,301 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-14 05:16:41,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:16:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-14 05:16:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:16:41,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:41,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:41,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:16:41,305 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-14 05:16:41,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:41,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147185740] [2020-10-14 05:16:41,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:41,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:41,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:16:41,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:41,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-14 05:16:41,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:41,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:41,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:16:41,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:41,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:16:41,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:16:41,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:41,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:41,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:41,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:41,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:16:41,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:41,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:41,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:41,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:16:41,689 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 05:16:41,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147185740] [2020-10-14 05:16:41,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:41,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:16:41,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938179332] [2020-10-14 05:16:41,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:16:41,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:41,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:16:41,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:16:41,697 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-14 05:16:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:41,723 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-14 05:16:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:16:41,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-14 05:16:41,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:41,726 INFO L225 Difference]: With dead ends: 18 [2020-10-14 05:16:41,727 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 05:16:41,728 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 05:16:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 05:16:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 05:16:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 05:16:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-14 05:16:41,735 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-14 05:16:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:41,735 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-14 05:16:41,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:16:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-14 05:16:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:16:41,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:41,736 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:41,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:16:41,737 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-14 05:16:41,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:41,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066635193] [2020-10-14 05:16:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:41,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:41,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:16:41,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:41,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-14 05:16:41,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:41,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:41,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:16:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:16:41,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:41,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:41,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:41,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:41,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:41,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:41,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:16:41,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:41,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:41,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:41,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:42,002 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 05:16:42,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066635193] [2020-10-14 05:16:42,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:42,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:16:42,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355258744] [2020-10-14 05:16:42,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:16:42,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:16:42,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:16:42,006 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-14 05:16:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:42,035 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-14 05:16:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:16:42,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-14 05:16:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:42,037 INFO L225 Difference]: With dead ends: 19 [2020-10-14 05:16:42,037 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:16:42,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:16:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:16:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:16:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:16:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 05:16:42,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 05:16:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:42,046 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 05:16:42,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:16:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 05:16:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 05:16:42,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:42,047 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:42,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:16:42,048 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-14 05:16:42,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:42,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175138842] [2020-10-14 05:16:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:42,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:42,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 05:16:42,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:42,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-14 05:16:42,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:42,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:42,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:16:42,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:42,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:16:42,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:42,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:42,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:42,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:42,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:42,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:42,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:42,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:42,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:42,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:42,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:16:42,349 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 05:16:42,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175138842] [2020-10-14 05:16:42,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:42,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:16:42,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881493538] [2020-10-14 05:16:42,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:16:42,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:42,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:16:42,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:16:42,357 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-10-14 05:16:42,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:42,410 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-14 05:16:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:16:42,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-14 05:16:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:42,412 INFO L225 Difference]: With dead ends: 20 [2020-10-14 05:16:42,412 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 05:16:42,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:16:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 05:16:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 05:16:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:16:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 05:16:42,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-14 05:16:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:42,427 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 05:16:42,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:16:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 05:16:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:16:42,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:42,428 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:42,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:16:42,429 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:42,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:42,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-14 05:16:42,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:42,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273176132] [2020-10-14 05:16:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:42,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:16:42,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:42,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-14 05:16:42,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:42,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:16:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:16:42,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:42,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:42,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:42,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:42,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:42,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:42,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:42,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:42,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:42,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:42,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:42,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:42,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273176132] [2020-10-14 05:16:42,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:42,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:16:42,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005570448] [2020-10-14 05:16:42,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:16:42,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:42,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:16:42,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:16:42,682 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-10-14 05:16:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:42,729 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-14 05:16:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:16:42,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-14 05:16:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:42,730 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:16:42,730 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:16:42,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:16:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:16:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:16:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:16:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-14 05:16:42,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-14 05:16:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:42,736 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-14 05:16:42,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:16:42,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-14 05:16:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:16:42,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:42,737 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:42,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:16:42,738 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:42,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-14 05:16:42,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:42,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700660627] [2020-10-14 05:16:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:42,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:42,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:42,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 05:16:42,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:16:42,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-14 05:16:42,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:42,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:42,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:16:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:16:42,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:16:42,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:43,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:16:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:16:43,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:16:43,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:16:43,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:16:43,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:16:43,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:16:43,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:16:43,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:16:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:16:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:16:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:16:43,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:16:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:16:43,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700660627] [2020-10-14 05:16:43,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:16:43,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:16:43,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332291005] [2020-10-14 05:16:43,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:16:43,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:16:43,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:16:43,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:16:43,061 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-10-14 05:16:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:16:43,113 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 05:16:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:16:43,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-14 05:16:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:16:43,114 INFO L225 Difference]: With dead ends: 22 [2020-10-14 05:16:43,114 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:16:43,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:16:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:16:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:16:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:16:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 05:16:43,120 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-14 05:16:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:16:43,120 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 05:16:43,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:16:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 05:16:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:16:43,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:16:43,121 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:16:43,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:16:43,121 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:16:43,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:16:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-14 05:16:43,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:16:43,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531224498] [2020-10-14 05:16:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:16:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 05:16:43,130 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 05:16:43,130 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 05:16:43,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:16:43,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:16:43 BoogieIcfgContainer [2020-10-14 05:16:43,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:16:43,151 INFO L168 Benchmark]: Toolchain (without parser) took 3043.96 ms. Allocated memory was 147.3 MB in the beginning and 241.7 MB in the end (delta: 94.4 MB). Free memory was 103.7 MB in the beginning and 195.8 MB in the end (delta: -92.1 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-10-14 05:16:43,152 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-14 05:16:43,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.10 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:16:43,154 INFO L168 Benchmark]: Boogie Preprocessor took 113.63 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.9 MB in the beginning and 181.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:16:43,155 INFO L168 Benchmark]: RCFGBuilder took 203.43 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:16:43,156 INFO L168 Benchmark]: TraceAbstraction took 2469.91 ms. Allocated memory was 202.9 MB in the beginning and 241.7 MB in the end (delta: 38.8 MB). Free memory was 169.9 MB in the beginning and 195.8 MB in the end (delta: -25.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-14 05:16:43,160 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.10 ms. Allocated memory is still 147.3 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.63 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 93.9 MB in the beginning and 181.3 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 203.43 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 169.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2469.91 ms. Allocated memory was 202.9 MB in the beginning and 241.7 MB in the end (delta: 38.8 MB). Free memory was 169.9 MB in the beginning and 195.8 MB in the end (delta: -25.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(x != 6) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 198 SDs, 0 SdLazy, 131 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 3175 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...