/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:41:57,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:41:57,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:41:57,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:41:57,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:41:57,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:41:57,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:41:57,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:41:57,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:41:57,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:41:57,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:41:57,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:41:57,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:41:57,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:41:57,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:41:57,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:41:57,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:41:57,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:41:57,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:41:57,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:41:57,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:41:57,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:41:57,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:41:57,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:41:57,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:41:57,797 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:41:57,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:41:57,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:41:57,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:41:57,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:41:57,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:41:57,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:41:57,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:41:57,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:41:57,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:41:57,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:41:57,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:41:57,806 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:41:57,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:41:57,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:41:57,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:41:57,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 20:41:57,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:41:57,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:41:57,837 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:41:57,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:41:57,838 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:41:57,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:41:57,838 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:41:57,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:41:57,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:41:57,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:41:57,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:41:57,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:41:57,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:41:57,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:41:57,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:41:57,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:41:57,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:41:57,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:41:57,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:41:57,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:41:57,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:41:57,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:41:57,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:41:57,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:41:57,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:41:57,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:41:57,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:41:57,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:41:57,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:41:57,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:41:58,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:41:58,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:41:58,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:41:58,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:41:58,327 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:41:58,328 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 20:41:58,419 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dc282b9a/3778440fb0d04ed7b2a678f436a80516/FLAG542c9cd9f [2020-09-24 20:41:58,960 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:41:58,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-24 20:41:58,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dc282b9a/3778440fb0d04ed7b2a678f436a80516/FLAG542c9cd9f [2020-09-24 20:41:59,305 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dc282b9a/3778440fb0d04ed7b2a678f436a80516 [2020-09-24 20:41:59,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:41:59,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:41:59,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:59,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:41:59,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:41:59,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3155a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59, skipping insertion in model container [2020-09-24 20:41:59,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:41:59,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:41:59,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:59,580 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:41:59,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:41:59,617 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:41:59,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59 WrapperNode [2020-09-24 20:41:59,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:41:59,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:41:59,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:41:59,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:41:59,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... [2020-09-24 20:41:59,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:41:59,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:41:59,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:41:59,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:41:59,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:41:59,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:41:59,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:41:59,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:41:59,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:41:59,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:41:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:41:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:41:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:41:59,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:42:00,017 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:42:00,017 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:42:00,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:00 BoogieIcfgContainer [2020-09-24 20:42:00,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:42:00,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:42:00,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:42:00,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:42:00,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:41:59" (1/3) ... [2020-09-24 20:42:00,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1693389f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:00, skipping insertion in model container [2020-09-24 20:42:00,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:41:59" (2/3) ... [2020-09-24 20:42:00,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1693389f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:00, skipping insertion in model container [2020-09-24 20:42:00,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:00" (3/3) ... [2020-09-24 20:42:00,038 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-24 20:42:00,055 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:42:00,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:42:00,110 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:42:00,164 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:42:00,164 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:42:00,164 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:42:00,165 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:42:00,165 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:42:00,165 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:42:00,165 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:42:00,165 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:42:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 20:42:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 20:42:00,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:00,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:00,193 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-24 20:42:00,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:00,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059636919] [2020-09-24 20:42:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 20:42:00,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:00,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-09-24 20:42:00,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:00,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 20:42:00,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:42:00,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 20:42:00,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:00,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:00,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 20:42:00,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:00,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:00,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:00,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059636919] [2020-09-24 20:42:00,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:00,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 20:42:00,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677214552] [2020-09-24 20:42:00,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:42:00,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:42:00,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:42:00,575 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-24 20:42:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:00,674 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-09-24 20:42:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 20:42:00,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-24 20:42:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:00,686 INFO L225 Difference]: With dead ends: 48 [2020-09-24 20:42:00,687 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 20:42:00,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 20:42:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 20:42:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-24 20:42:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-24 20:42:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-24 20:42:00,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2020-09-24 20:42:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:00,732 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-24 20:42:00,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:42:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-24 20:42:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 20:42:00,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:00,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:00,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:42:00,734 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:00,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-24 20:42:00,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:00,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8100293] [2020-09-24 20:42:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 20:42:00,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:00,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-24 20:42:00,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:42:00,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:42:00,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 20:42:00,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:00,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:00,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:00,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:00,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:00,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:00,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:42:00,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:00,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:00,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:00,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:00,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:00,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8100293] [2020-09-24 20:42:00,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:00,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 20:42:00,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344669453] [2020-09-24 20:42:00,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 20:42:00,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:00,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 20:42:00,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 20:42:00,925 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-09-24 20:42:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:00,997 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-09-24 20:42:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 20:42:00,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-24 20:42:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:00,999 INFO L225 Difference]: With dead ends: 45 [2020-09-24 20:42:00,999 INFO L226 Difference]: Without dead ends: 29 [2020-09-24 20:42:01,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:42:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-24 20:42:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-24 20:42:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 20:42:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-24 20:42:01,007 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-24 20:42:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:01,008 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-24 20:42:01,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 20:42:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-24 20:42:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 20:42:01,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:01,009 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:01,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:42:01,010 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:01,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:01,010 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-24 20:42:01,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:01,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627432389] [2020-09-24 20:42:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 20:42:01,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:01,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-09-24 20:42:01,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 20:42:01,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:01,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 20:42:01,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:01,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:01,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:01,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:01,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:42:01,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:01,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:01,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:01,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:01,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:01,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627432389] [2020-09-24 20:42:01,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:01,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 20:42:01,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485432890] [2020-09-24 20:42:01,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:42:01,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:42:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:42:01,439 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-09-24 20:42:01,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:01,563 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-09-24 20:42:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 20:42:01,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-24 20:42:01,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:01,567 INFO L225 Difference]: With dead ends: 43 [2020-09-24 20:42:01,568 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 20:42:01,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:42:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 20:42:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-09-24 20:42:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-24 20:42:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-24 20:42:01,577 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2020-09-24 20:42:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:01,577 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-24 20:42:01,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:42:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-24 20:42:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 20:42:01,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:01,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:01,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 20:42:01,579 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1311034243, now seen corresponding path program 1 times [2020-09-24 20:42:01,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:01,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997573968] [2020-09-24 20:42:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:01,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:01,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:02,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 20:42:02,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 20:42:02,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-09-24 20:42:02,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 20:42:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:42:02,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 20:42:02,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:02,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:02,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:02,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:02,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:02,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:42:02,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:02,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:02,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:42:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:02,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997573968] [2020-09-24 20:42:02,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:02,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 20:42:02,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371902155] [2020-09-24 20:42:02,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 20:42:02,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:02,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 20:42:02,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 20:42:02,525 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-09-24 20:42:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:02,710 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-09-24 20:42:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 20:42:02,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-09-24 20:42:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:02,712 INFO L225 Difference]: With dead ends: 53 [2020-09-24 20:42:02,713 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 20:42:02,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 20:42:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 20:42:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-24 20:42:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 20:42:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-09-24 20:42:02,722 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 34 [2020-09-24 20:42:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:02,722 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-09-24 20:42:02,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 20:42:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-09-24 20:42:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 20:42:02,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:02,724 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:02,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 20:42:02,725 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1019958301, now seen corresponding path program 2 times [2020-09-24 20:42:02,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:02,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548801387] [2020-09-24 20:42:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:02,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:02,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 20:42:03,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:42:03,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-09-24 20:42:03,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:42:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:42:03,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 20:42:03,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:03,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:03,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:03,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:03,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:03,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:03,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 20:42:03,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:03,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:03,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:03,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:03,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:03,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548801387] [2020-09-24 20:42:03,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:03,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 20:42:03,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881454461] [2020-09-24 20:42:03,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:42:03,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:03,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:42:03,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:42:03,853 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2020-09-24 20:42:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:04,191 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-09-24 20:42:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 20:42:04,192 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-09-24 20:42:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:04,193 INFO L225 Difference]: With dead ends: 84 [2020-09-24 20:42:04,193 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 20:42:04,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:42:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 20:42:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-24 20:42:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 20:42:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-24 20:42:04,202 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2020-09-24 20:42:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:04,203 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-24 20:42:04,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:42:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-24 20:42:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 20:42:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:04,205 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:04,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 20:42:04,205 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 3 times [2020-09-24 20:42:04,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:04,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236582448] [2020-09-24 20:42:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:04,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:04,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:04,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:04,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 20:42:04,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:42:04,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-09-24 20:42:04,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 20:42:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 20:42:04,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 20:42:04,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:04,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:04,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:04,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:04,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:04,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 20:42:04,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:04,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:04,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:04,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:04,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:04,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236582448] [2020-09-24 20:42:04,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:42:04,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 20:42:04,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142490001] [2020-09-24 20:42:04,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 20:42:04,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:04,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 20:42:04,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 20:42:04,926 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-09-24 20:42:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:05,261 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-24 20:42:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 20:42:05,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-09-24 20:42:05,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:05,263 INFO L225 Difference]: With dead ends: 61 [2020-09-24 20:42:05,263 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 20:42:05,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 20:42:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 20:42:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-24 20:42:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 20:42:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-24 20:42:05,271 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-24 20:42:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:05,272 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-24 20:42:05,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 20:42:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-24 20:42:05,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 20:42:05,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:05,273 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:05,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 20:42:05,273 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:05,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:05,274 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 4 times [2020-09-24 20:42:05,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:05,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111130571] [2020-09-24 20:42:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:42:05,287 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:42:05,287 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:42:05,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 20:42:05,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:42:05 BoogieIcfgContainer [2020-09-24 20:42:05,311 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:42:05,315 INFO L168 Benchmark]: Toolchain (without parser) took 5992.20 ms. Allocated memory was 145.8 MB in the beginning and 276.8 MB in the end (delta: 131.1 MB). Free memory was 102.1 MB in the beginning and 223.8 MB in the end (delta: -121.7 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,316 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,316 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.84 ms. Allocated memory is still 145.8 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,317 INFO L168 Benchmark]: Boogie Preprocessor took 124.18 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.2 MB in the beginning and 182.4 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,318 INFO L168 Benchmark]: RCFGBuilder took 279.97 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 169.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,319 INFO L168 Benchmark]: TraceAbstraction took 5284.82 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 169.7 MB in the beginning and 223.8 MB in the end (delta: -54.1 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:05,323 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.84 ms. Allocated memory is still 145.8 MB. Free memory was 101.4 MB in the beginning and 92.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.18 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 92.2 MB in the beginning and 182.4 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.97 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 169.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5284.82 ms. Allocated memory was 202.4 MB in the beginning and 276.8 MB in the end (delta: 74.4 MB). Free memory was 169.7 MB in the beginning and 223.8 MB in the end (delta: -54.1 MB). Peak memory consumption was 20.3 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: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 102 SDslu, 549 SDs, 0 SdLazy, 302 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, 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, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 176 ConstructedInterpolants, 0 QuantifiedInterpolants, 15178 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 10/241 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...